Name: Oasly Home — Tankless Reverse Osmosis with Remineralization | Oasly
Brand: Oasly
SKU: H600-RE01
Price: 24.90 EUR
Availability: InStock

Question 1

When is a bottled water delivery service the better choice?

Accepted Answer

If you can't drill a hole for a second tap and your landlord won't allow a 3-way faucet; if there's no cold water connection near where you want to drink; if you want 90 °C water on tap without boiling a kettle; or if you're outside Barcelona, where we don't install. If any of those describe you, a delivery service is probably the better fit. We'd rather tell you now.

Question 2

Is bottled water delivery or a filter cheaper?

Accepted Answer

It depends on how much you drink and on the quote you are given. Delivery pricing is usually arranged after a sales visit rather than published, so compare the total yearly figure. Our prices are published: €24.90 per month, €249 per year, or €629 to €699 to buy the unit outright.

Question 3

How much space does a water dispenser take up?

Accepted Answer

A floor-standing dispenser occupies roughly the footprint of a small bin, and you also need somewhere to keep full bottles waiting to be used and empty ones waiting for collection. A point-of-use filter sits inside the sink cabinet instead, so nothing stands on the kitchen floor.

Question 4

Do water dispensers use a lot of electricity?

Accepted Answer

They heat and cool water continuously, so they draw power around the clock. Spanish consumer organisation OCU measured units of this type drawing roughly twice as much as a fridge (OCU, June 2025). Our system uses about 85 W, and only while it is actually producing water.

Question 5

What happens if I run out of bottled water?

Accepted Answer

You wait for the next delivery cycle, or you buy bottles at the supermarket to bridge the gap. Deliveries are typically monthly, so a heavier week can leave you short. Water filtered at the tap draws from your mains supply, so there is no cycle to run out of.

Question 6

Can I install a water filter in a rented flat in Barcelona?

Accepted Answer

Often yes, but ask your landlord first. Installation means connecting to the cold-water feed and drain under the sink, and usually a dedicated faucet, which needs a hole in the worktop or sink. If drilling is not allowed, a delivery service is likely the better option for you.

Question 7

What type of water filtration system does Oasly use?

Accepted Answer

Oasly uses an advanced 600 GPD (Gallons Per Day) tankless reverse osmosis (RO) water filtration system with alkaline remineralization. Unlike traditional RO systems with bulky storage tanks, our tankless design is compact, prevents secondary contamination, and delivers fresh filtered water on demand. The system takes about 10 seconds to fill a 330 ml glass, and is rated at 600 GPD — up to 2,270 litres a day.

Question 8

What is reverse osmosis and how does it work?

Accepted Answer

Reverse osmosis is the technology used where water purity matters most, from laboratories to bottling plants. Pressure pushes tap water through a semi-permeable membrane with a pore size of 0.0001 micron — small enough to block dissolved solids, while water molecules pass through. Our system then remineralises the water, adding back calcium, magnesium and potassium at pH 7.5-9.5.

Question 9

What is the 7-stage filtration process?

Accepted Answer

The Oasly Home system uses 7 stages of filtration across 3 filter cartridges:  Stages 1-2: Composite Pre-Filter (Pre-filtration) - Stage 1: PP cotton sediment layer - a mechanical pre-filter rated to 5 microns - Stage 2: Activated carbon block - carbon media that addresses chlorine taste and odour  Stages 3-5: Reverse Osmosis Membrane - Stage 3: Pre-RO carbon compound layer - final preparation before the membrane - Stage 4: 600 GPD reverse osmosis membrane - a semi-permeable membrane with a pore size of 0.0001 micron, small enough to block dissolved solids - Stage 5: Post-RO flow regulator - optimises water pressure and efficiency  Stages 6-7: Remineralization Filter (Enhancement) - Stage 6: Alkaline Particles - Raises water pH to 7.5-9.5 - Stage 7: Mineral + Carbon Block - Adds calcium, magnesium and potassium; polishes taste

Question 10

What does the remineralization filter do?

Accepted Answer

The remineralization filter is a 3-in-1 compounded filtration system that solves the main drawbacks of traditional reverse osmosis:  1. Alkaline Particles: Standard RO water is slightly acidic (pH ~6.0-6.5). It raises the pH to 7.5-9.5 - highest on a fresh cartridge and settling toward 7.5 over the year - which is alkaline and consistent with your body's natural pH of 7.4. Drinking alkaline water may support hydration and overall wellbeing.  2. Mineral Restoration: Reverse osmosis produces very low-mineral water. This filter adds back calcium, magnesium and potassium through ionically activated elements, which also improves taste.  3. Carbon Block Polish: A final activated carbon layer polishes taste and odour before the water reaches the tap.  Note: The added minerals raise the finished-water TDS. Typical measured output is 50-80 ppm, and most of that is the minerals the filter adds back.

Question 11

What is TDS and what should my reading be?

Accepted Answer

TDS stands for Total Dissolved Solids - the combined content of all inorganic and organic substances dissolved in water, measured in parts per million (ppm) or milligrams per liter (mg/L).  What we measure in your kitchen: - Barcelona tap water input: typically 400-800 ppm - Finished water from the new tap: typically 50-80 ppm  We take both readings, before installation and afterwards, and show you both numbers. Most of the finished-water figure is the calcium and magnesium the remineralisation filter adds back, so a reading slightly above the membrane output is expected.

Question 12

Why is there no water tank? What are the benefits of tankless design?

Accepted Answer

Traditional RO systems store filtered water in a pressurised tank: - The water sits in the tank between uses - The tank takes up significant under-sink space - Water can taste stale if not used frequently - Tanks eventually need replacement  The Oasly tankless design: - Filtered on demand: every drop is filtered when you open the tap - Nothing stored: no tank, no standing water - Compact footprint: saves under-sink space - Lower maintenance: no tank to clean or replace

Question 13

What is the drain ratio and why does it matter?

Accepted Answer

Drain ratio refers to how much water is 'wasted' (sent to drain) during the RO process compared to filtered water produced. Traditional RO systems often have ratios of 4:1 or higher (4 liters wasted per 1 liter produced).  The Oasly system has an industry-leading 2:1 drain ratio, meaning for every 1.5 liters sent to drain, you get 1 litre of filtered water. That sends roughly 6× less water to the drain than a conventional 1:3 system, making it both economical and environmentally responsible. Over the system's lifetime, this efficiency can save thousands of liters of water.

Question 14

How fast does water come out?

Accepted Answer

The Oasly system delivers water on demand: - About 10 seconds to fill a 330 ml glass - Rated at 600 GPD — up to 2,270 litres a day - Enough for a large household  This is significantly faster than many traditional RO systems due to the powerful internal pump and tankless direct-flow design.

Question 15

What do you measure, and what can you show me?

Accepted Answer

We measure the total dissolved solids (TDS) in your tap water before installation, and again from the new tap afterwards. You see both numbers, taken in your own kitchen.  Typical Barcelona mains water reads 400-800 ppm. Finished water from the Oasly tap is typically 50-80 ppm, and most of that figure is the calcium and magnesium the remineralisation filter adds back.  Independent laboratory testing of our specific unit is in progress with a Spanish accredited laboratory. We would rather publish real numbers than estimates, so we do not make claims about individual substances until that testing is complete.

Question 16

What is reverse osmosis and why is it used?

Accepted Answer

Reverse osmosis is the same process used to bottle drinking water and to turn seawater into fresh water. It separates by scale.  An RO membrane is not a sieve with holes. It is a dense polymer film, rated at approximately 0.0001 micron. Water molecules cross it readily. Dissolved salts, metals and larger molecules cross far less readily — they are both physically larger and chemically less able to pass through the film.  For reference, typical published particle sizes are: human hair 70 µm; cysts such as Giardia and Cryptosporidium 3-15 µm; bacteria and microplastic fragments 0.5-5 µm; viruses 0.02-0.4 µm; dissolved salts and metal ions around 0.001 µm; RO membrane rating 0.0001 µm.  How much any individual system reduces a given substance depends on the unit, the incoming water and the age of the membrane. Independent testing of our own unit is in progress with a Spanish accredited laboratory, and we would rather publish those numbers than estimate.  Because reverse osmosis also leaves very low-mineral water, our system remineralises it afterwards, adding back calcium, magnesium and potassium at pH 7.5-9.5.

Question 17

Is Barcelona tap water safe to drink? Why would I filter it?

Accepted Answer

Barcelona tap water meets EU drinking water standards and is safe to drink. People filter it for other reasons:  Taste and hardness: - Barcelona water is hard, which gives it a distinct taste and leaves limescale - Chlorine used for disinfection affects smell and flavour - Many residents simply prefer the taste of filtered water  Convenience: - Unlimited drinking water at the tap, with no bottles to buy, carry or store  We do not claim your tap water is unsafe. If you are happy with the taste, you may not need us.

Question 18

How does this compare to bottled or delivered water?

Accepted Answer

The difference is architecture. Bottled and delivered water is treated elsewhere, stored in plastic, and transported to you, so it can run out and it needs floor space. Water filtered at the tap comes from your mains supply and is filtered the moment you open the tap, with nothing stored.  On cost, our published prices are €24.90 per month, €249 per year, or €629-€699 to buy the unit outright, for unlimited water.

Question 19

Why might my TDS reading be higher at first, then settle?

Accepted Answer

When the system has not been used for several hours, you may notice the TDS reading starts higher and drops after 30-60 seconds of flow. This is called osmotic creep and is normal in all RO systems.  What happens: when the pump stops, natural osmosis occurs across the membrane in the opposite direction, so a small amount of dissolved solids migrates to the pure side. The first water you dispense is that water.  Key points: - The reading settles within about a minute of continuous flow - This is normal physics, not a defect - All RO systems behave this way

Question 20

Why does my TDS pen read higher than the membrane output?

Accepted Answer

A handheld TDS pen measures the water after all seven stages, including remineralisation. The remineralisation filter adds calcium, magnesium and potassium back into the water, and a TDS pen counts those minerals along with everything else.  A typical finished-water reading is 50-80 ppm. If the system has been idle for a while, the filter may release slightly more minerals at first, so the reading can start higher and settle with use.

Question 21

What do I need for installation?

Accepted Answer

Essential requirements: - 230V power outlet under or near the sink (within reach of power cable) - Cold water supply line (standard kitchen connection) - Minimum under-sink space: 38 x 14 x 40 cm (width x depth x height) - Drain connection for waste water  Faucet options: 1. Standard filtered water faucet - Requires drilling a ~1.3cm (13mm) hole in countertop or sink 2. 3-way faucet upgrade (€79.90) - Replaces your existing faucet, delivers both filtered and regular water from one tap, no additional drilling needed

Question 22

What if I don't have a power outlet under my sink?

Accepted Answer

Most Barcelona kitchens have an outlet under the sink (often used for dishwashers or garbage disposals). If yours is occupied: - We bring a double adapter/splitter so both appliances can connect - Extension cords can reach outlets inside nearby cabinets  If there's truly no outlet accessible: - An electrician would need to install one (not included in our service) - We can recommend trusted electricians in Barcelona

Question 23

Do you drill a hole in my countertop?

Accepted Answer

For the standard faucet option: Yes, we drill a small hole approximately 1.3cm (13mm) in diameter. The hole location is chosen together with you, typically near the existing faucet.  Concerned about drilling? We offer two solutions: 1. Hole cover plate: When service ends, we seal the hole with a matching cover plate 2. 3-way faucet (€79.90): Replaces your existing tap entirely - no additional holes needed and the faucet is yours to keep

Question 24

What if my countertop is thicker than standard?

Accepted Answer

Standard faucet mounting hardware fits countertops up to approximately 3.8cm (1.5 inches). If your countertop is thicker (common with granite or composite materials), contact us at support@oasly.es and we'll provide an extended threaded shaft at no extra charge.

Question 25

How long does installation take?

Accepted Answer

Professional installation typically takes 45-90 minutes depending on your kitchen configuration. Our technician will: - Assess the installation site - Connect the water supply line - Connect the drain line - Install the faucet - Power on and test the system - Run initial flush cycle (15-30 minutes) - Show you how to use the system - Measure the TDS from the new tap and show you the reading

Question 26

Can I install the system myself?

Accepted Answer

For the 'Machine Only' purchase option (€629, installation not included), yes - self-installation is required. We provide: - Detailed installation manual - Video tutorial access - WhatsApp support if you have questions  Self-installation requires: - Basic plumbing comfort (connecting water lines) - Ability to drill a hole for the faucet (if not using 3-way option) - Tools: adjustable wrench, drill, 13mm drill bit (for faucet)  €699 with installation in Barcelona is recommended if you're not confident with plumbing.

Question 27

I rent my apartment. Will my landlord approve this?

Accepted Answer

Many renters successfully use Oasly. Here's what to know:  What the installation involves: - Small hole (~1.3cm) in countertop OR 3-way faucet replacement - Connection to water supply (reversible) - Drain connection (reversible) - Power outlet usage  Options for renters: 1. 3-way faucet (no hole needed): Keep your original faucet, we reinstall it when you leave 2. Standard faucet with hole cover: We seal the hole with a matching cover plate when service ends 3. Get written approval: Some landlords readily approve when they understand it's professional, reversible, and adds value  When you move within Barcelona: We relocate your system free of charge as part of your subscription.

Question 28

What's included in the subscription?

Accepted Answer

Monthly subscription (€24.90/month) includes: - Oasly RO unit (remains Oasly property) - Remineralization filter - Professional installation in Barcelona - Standard filtered water faucet - All maintenance and support - Annual filter replacement (we come to you) - Free relocation within Barcelona if you move - Cancel anytime after initial period  Annual subscription (€249/year) includes: - Everything above - Save €50 compared to monthly - No deposit required

Question 29

Is there a deposit?

Accepted Answer

Monthly subscription: €75 deposit required at signup - Automatically refunded after 6 consecutive monthly payments in good standing - Also refunded when subscription ends (equipment returned in good condition)  Annual subscription: No deposit required  One-time purchase: No deposit (you own the equipment)

Question 30

What happens if I cancel?

Accepted Answer

- Within 14 days of delivery: EU cooling-off period applies, full refund minus any service already provided - Within first 12 months: €75 service fee for equipment removal - After 12 months: No cancellation fee, free equipment removal - Notice period: 2 months written notice required for cancellation  We'll arrange equipment pickup at your convenience. If you paid a deposit, it's returned after equipment inspection confirms good condition.

Question 31

Can I switch between monthly and annual plans?

Accepted Answer

Yes. Contact us via WhatsApp to switch: - Monthly → Annual: Pays out the yearly rate, get monthly payments stopped - Annual → Monthly: Continues at monthly rate after current year ends

Question 32

What's the difference between subscription and one-time purchase?

Accepted Answer

Subscription (Monthly €24.90 or Annual €249): - No large upfront cost - Installation included - All filters included forever - Maintenance included - Free relocation within Barcelona - Equipment belongs to Oasly - Cancel anytime (with notice)  One-time purchase (€629 machine only, self-installed / €699 with installation in Barcelona): - Own the equipment outright - €699 with installation in Barcelona (€629 machine only, self-installed) - You purchase replacement filters (€30-90 each, annually) - You handle maintenance or pay for service visits - 3-year EU statutory conformity warranty - Ships nationwide in Spain

Question 33

Do you offer business/office pricing?

Accepted Answer

Yes. Water consumption varies significantly between businesses, which may require more frequent filter changes. Contact us for a custom quote based on: - Estimated daily water consumption - Number of employees/users - Multiple unit needs - Specific requirements

Question 34

How much do replacement filters cost?

Accepted Answer

For one-time purchase customers:  | Filter | Replacement Interval | Estimated Cost | |--------|---------------------|----------------| | Composite pre-filter (1st stage) | Every 12 months | ~€35-40 | | Reverse osmosis membrane (2nd stage) | Every 24 months | ~€90-100 | | Remineralization filter (3rd stage) | Every 12 months | ~€40-45 |  Annual filter cost estimate: €75-85/year (stages 1 and 3) Every 2 years: Add ~€90-100 for stage 2  Subscription customers: All filters included, we handle replacements.

Question 35

How often do filters need changing?

Accepted Answer

Each cartridge has its own replacement interval:  | Filter | Lifespan | What It Does | |--------|----------|---------------| | Stage 1 (composite pre-filter) | 12 months | Pre-filtration, sediment, chlorine | | Stage 2 (RO membrane) | 24 months | Reverse osmosis membrane, 0.0001 micron | | Stage 3 (remineralization) | 12 months | Remineralization, pH balance |  For subscribers: We proactively schedule filter changes - you don't need to track anything.  For purchase customers: Order replacements based on the intervals above, counting from your installation date.  Actual lifespan depends on your water quality and usage. Heavy users or areas with poorer input water may need more frequent changes.

Question 36

How do I change the filters myself?

Accepted Answer

Filter changes are designed to be tool-free and simple:  Stages 1 & 2: 1. Turn off power 2. Turn off water supply 3. Twist filter counterclockwise to remove 4. Insert new filter, twist clockwise until locked 5. Restore water and power 6. Run for 15 minutes before drinking  Stage 3 (remineralization filter): 1. You don't even need to turn off water or power 2. Built-in shut-off valve handles water automatically 3. Simply twist out old filter, twist in new one 4. Run for 2-3 minutes to flush  Detailed video tutorials available on request.

Question 37

What if something goes wrong with my machine?

Accepted Answer

Subscription customers: - WhatsApp us immediately at +34 689 44 85 08 - We diagnose remotely if possible - If needed, we schedule a service visit (included free) - Replacement equipment provided if repair isn't possible  Purchase customers: - WhatsApp support available for troubleshooting - 3-year EU statutory conformity warranty covers defects - Service visits available (charged separately after warranty)

Question 38

Why are there white bubbles in my water?

Accepted Answer

Completely normal and safe! When the RO pump pressurizes water, air becomes dissolved under pressure (like carbonated water). When dispensed, pressure releases and tiny air bubbles appear.  What to do: Nothing! Let the glass sit for 30-60 seconds and bubbles will dissipate completely. The water is perfectly safe to drink immediately - it's just dissolved air.

Question 39

My water flow seems slow. What should I check?

Accepted Answer

Possible causes and solutions:  1. Pre-filter clogged: If Stage 1 filter is past due, it restricts flow. Replace the composite pre-filter.  2. Low water pressure: System requires minimum 20 PSI (1.4 bar). Check if other taps have normal pressure.  3. Kinked tubing: Ensure tubes under sink aren't bent or crushed.  4. RO membrane exhausted: If Stage 2 is past due (24 months), efficiency drops. Replace the RO membrane.  5. Cold weather: Very cold input water can slow membrane performance slightly.  For subscribers: Contact us via WhatsApp and we'll diagnose and resolve.

Question 40

Can I use the filtered water for my coffee machine/kettle/humidifier?

Accepted Answer

Absolutely! Oasly water is ideal for: - Coffee machines: Prevents limescale, improves taste - Kettles: No more white deposits, faster boiling - Humidifiers: Prevents mineral buildup, cleaner mist - Steam irons: Extends appliance life - Aquariums: Remineralized version is better than pure RO (fish need some minerals) - Plants: Most plants thrive with remineralized RO water - Pet drinking water: suitable for dogs, cats and other pets

Question 41

Where do you offer subscription service?

Accepted Answer

Subscription service (with installation, maintenance, and filter changes) is available only within Barcelona city limits, including:  - Ciutat Vella (Gothic Quarter, Born, Barceloneta, Raval) - Eixample (Dreta, Esquerra, Sant Antoni) - Sants-Montjuïc - Les Corts - Sarrià-Sant Gervasi - Gràcia - Horta-Guinardó - Nou Barris - Sant Andreu - Sant Martí (Poblenou, Diagonal Mar, etc.)  Not sure if your address qualifies? Send us your postal code via WhatsApp and we'll confirm.

Question 42

Can I buy the machine if I'm outside Barcelona?

Accepted Answer

Yes! The 'Machine Only' purchase option (€629, self-installed, no installation included) ships throughout mainland Spain and the Balearic Islands.  - Shipping is handled by standard courier - Self-installation required - WhatsApp support available for installation questions - You purchase replacement filters directly from oasly.shop

Question 43

What if I move to a new apartment in Barcelona?

Accepted Answer

For subscribers: Relocation is free as part of your subscription. Simply: 1. WhatsApp us with your move date and new address 2. We schedule pickup at old location 3. We reinstall at new location 4. Same equipment, no interruption in service  For purchase customers: You can move the equipment yourself or hire a plumber. We can recommend professionals if needed.

Question 44

How quickly can you install?

Accepted Answer

Typical lead time is 3-7 days from signup, depending on our current schedule. We offer: - Morning slots: 9:00-13:00 - Afternoon slots: 15:00-19:00 - Some Saturday availability  Urgent installations may be possible - ask via WhatsApp.

Question 45

Is remineralized RO water healthy to drink?

Accepted Answer

Why remineralisation matters: - Reverse osmosis on its own produces very low-mineral water - Our filter adds back calcium, magnesium and potassium - These are minerals also found in mineral water - Finished pH is 7.5-9.5, highest on a fresh cartridge and settling toward 7.5 over the year  Context: - The World Health Organization notes that demineralised water may be less desirable to drink long term, which is why the remineralisation stage exists - Typical measured output is 50-80 ppm TDS, most of it those added minerals

Question 46

Can I use the water for babies and formula?

Accepted Answer

The water is reverse osmosis filtered and remineralised with calcium, magnesium and potassium, and it can be boiled normally.  Note: always follow your formula manufacturer's instructions, and your paediatrician's advice, on preparing feeds. Many recommend boiling water even when it has been filtered. We do not make health claims about our water for infants.

Question 47

Is the water safe for pets?

Accepted Answer

Yes. Dogs, cats and other pets can drink Oasly water, and the remineralisation stage means it is not mineral-free. Many pet owners notice their animals prefer the taste of filtered water.  For aquariums: The remineralized water works well for most freshwater fish. For sensitive species or saltwater tanks, you may want pure RO water before remineralization (contact us about options).

Question 48

Can I cook with the filtered water?

Accepted Answer

Yes. Filtered water works well for cooking: - Better tasting rice, pasta and soups - Clearer flavours in stocks and sauces - No chlorine taste in boiled foods - Less limescale in pans and kettles

Question 49

How does Oasly help the environment?

Accepted Answer

Plastic reduction: - Average person uses 150+ plastic bottles per year - A family of 4 eliminates 600+ bottles annually with Oasly - Over 3 years: 1,800+ bottles never created  Carbon footprint: - No truck deliveries of heavy water bottles - No manufacturing energy for bottles - No shipping plastic from factory to store to home  Water efficiency: - 2:1 drain ratio is industry-leading - Traditional RO systems waste 4-5x more water - Efficient pump design keeps power consumption at about 85 W while producing water

Question 50

What happens to the wastewater/drain water?

Accepted Answer

The drain water from an RO system is simply more concentrated tap water — the dissolved solids that did not pass through the membrane stay on that side. It goes directly into your drain, where it joins normal household wastewater heading to treatment facilities.  Can it be reused? Some customers collect drain water for: - Watering non-edible plants - Cleaning/mopping floors - Flushing toilets (with modification)  The 2:1 ratio means waste is minimized compared to older systems.

Question 51

Is the system recyclable at end of life?

Accepted Answer

- Filters: Plastic housing can often be recycled (check local guidelines) - Machine: Contains recyclable plastics and metals - For subscribers: We handle equipment properly when service ends - For purchasers: Most e-waste facilities accept water treatment equipment

Question 52

How does Oasly compare to a carbon filter jug?

Accepted Answer

The technologies are different. A jug uses activated carbon only, which works on taste and odour. Our system uses activated carbon plus a reverse osmosis membrane with a pore size of 0.0001 micron, then remineralises the water.  | Feature | Oasly | Carbon filter jug | |---------|-------|-------------------| | Technology | Carbon + reverse osmosis + remineralisation | Activated carbon | | Capacity | Unlimited, on demand | 2-3 litres at a time | | Refilling | Not needed | Constant refilling | | Filter frequency | Annual | Every 1-2 months | | Remineralisation | Yes | No | | Measurement | We measure your TDS before and after | Not measured |

Question 53

How does Oasly compare to bottled water?

Accepted Answer

| Feature | Oasly | Bottled water | |---------|-------|---------------| | Where it is treated | At your tap, from your mains supply | At a plant, then transported | | Storage | None, filtered on demand | Sits in plastic until you drink it | | Plastic waste | None | Bottles to dispose of or return | | Cost | €24.90/month, €249/year, or €629-€699 to buy | Varies by format and quantity | | Convenience | Unlimited at the tap | Buy, carry, store | | Can you run out? | No | Yes |

Question 54

How does Oasly compare to other RO services in Barcelona?

Accepted Answer

Oasly offers: - Transparent pricing: No hidden fees, clear subscription model - Modern equipment: Latest tankless technology, no storage tank - Responsive support: WhatsApp-first communication, fast responses - Flexible plans: Monthly, annual, or purchase options - Free relocation: Move within Barcelona without extra charges - Measured results: we take a TDS reading before and after installation and show you both

Question 55

Why does my TDS seem high right after I turn on the faucet?

Accepted Answer

This is 'osmotic creep' - normal physics of RO membranes. When the system rests, some dissolved solids naturally migrate across the membrane. The first 10-30 seconds of water may show higher TDS, but it quickly normalizes. The water is still much cleaner than tap water and safe to drink immediately.

Question 56

I hear a humming/motor sound - is this normal?

Accepted Answer

Yes, when dispensing water. The internal pump creates a gentle hum during operation. You should NOT hear: - Grinding or clicking noises - Extremely loud vibration - Sounds when faucet is closed  Unusual sounds warrant a support call.

Question 57

Water is dripping from underneath the unit

Accepted Answer

Check in order: 1. Filter connections: Ensure all filters are fully seated and twisted clockwise 2. Tube fittings: Push tubes firmly into quick-connect fittings 3. Drain line: Ensure drain tube is properly inserted and secured 4. Unit damage: Look for cracks in housings  If leaking continues, turn off water supply and contact support immediately.

Question 58

My water tastes strange after filter change

Accepted Answer

Normal when filters are new: - Run water for 15-20 minutes after changing stages 1 or 2 - Run for 2-3 minutes after changing stage 3 (remineralization) - Some carbon filter 'dust' taste may appear initially  If taste issues persist after flushing, contact support.

Question 59

Who is Oasly?

Accepted Answer

OASLY AQUA, S.L. is a Barcelona-based water filtration company founded to solve the city's drinking water challenges. We believe everyone deserves access to pure, healthy water without the environmental cost of plastic bottles.  Company details: - Legal name: OASLY AQUA, S.L. - CIF: B22655765 - Registered address: Carrer del Degà Bahí 28, 08026 Barcelona - Primary contact: WhatsApp +34 689 44 85 08 - Email: support@oasly.es

Question 60

What equipment does Oasly use?

Accepted Answer

Our systems are built to globally recognized water filtration standards: - Tankless direct-flow reverse osmosis design - 7-stage filtration across 3 cartridges - Years of RO system expertise - Excellent reliability track record  The Oasly system is configured specifically for Barcelona's water conditions and European electrical standards (230V/50Hz).

Question 61

How do I contact support?

Accepted Answer

- WhatsApp (fastest): +34 699 977 079 - Email: support@oasly.es - Legal inquiries: legal@oasly.com - Privacy/data requests: privacy@oasly.com  WhatsApp is monitored daily and provides the fastest response times.

Question 62

Where can I learn more or sign up?

Accepted Answer

- Main website: https://www.oasly.es - Online shop: https://oasly.shop - Product details: https://product.oasly.es  [whatsapp-button] https://wa.me/34699977079?text=Hola%20Oasly%2C%20I%27m%20interested.%20My%20postal%20code%20is%3A

Criterion	Water delivery service	Oasly
Where the water comes from	Purified and bottled at a plant, then transported to your door	Your own mains supply, filtered at the point of use
Freshness	Sits in a plastic bottle at room temperature, typically a month between deliveries	Filtered the moment you open the tap — nothing is stored
Can you run out?	Yes, between delivery cycles	No
Floor space	A dispenser, plus somewhere to keep full and empty bottles	Under the sink. Nothing on the floor
Physical handling	Lifting and inverting a 20 kg bottle each cycle	None
Electricity	Dispensers heat and cool continuously. Spanish consumer organisation OCU measured units of this type drawing roughly twice as much as a fridge (OCU, June 2025)	About 85 W, and only while producing water
Minerals	Varies by product	Remineralised — calcium, magnesium and potassium restored, pH 7.5–9.5
Price transparency	Typically quoted after a sales visit rather than published	Published: €24.90/month, €249/year, or €629–€699 to buy
Commitment	Varies by provider	Cancel anytime

Bottled water delivery, or filtered water from your tap?

Delivery service vs. filtration at the tap

Where the water comes from

Freshness

Can you run out?

Floor space

Physical handling

Electricity

Minerals

Price transparency

Commitment

Common questions about the two options

When is a bottled water delivery service the better choice?

Is bottled water delivery or a filter cheaper?

How much space does a water dispenser take up?

Do water dispensers use a lot of electricity?

What happens if I run out of bottled water?

Can I install a water filter in a rented flat in Barcelona?

Limitless Hydration

Key specifications

Direct flow. No tank.

How reverse osmosis works

Three cartridges. Seven stages.

Composite pre-filter

Reverse osmosis membrane

Remineralization filter

Typical particle sizes

What we actually measure

Alkaline adjustment

Why Choose Oasly

Health

Taste

Convenience

Eco-Friendly

Cost-Effective

Looked after

Oasly Home vs. tank system

We keep track of it for you

Filter changes, scheduled

Upgrades included

A real person, on WhatsApp

Will it fit under your sink?

Faucet options

Standard Oasly faucet

3-way faucet upgrade

Choose Your Plan

Monthly Subscription

Yearly Subscription

One-Time Purchase

Warranty & Service

On subscription: service included

On purchase: 3-year EU statutory warranty

The detail, if you want it

Cost comparison · 5-year overview

Frequently Asked Questions

Product & Technology