FAQ

The Oasly RO unit (remains Oasly property) and remineralization filter. Professional installation and the standard filtered-water faucet. All maintenance and service calls, and the yearly filter change (we come to you). Free relocation if you move within the service area. No deposit and no upfront cost.

Barcelona city (08001–08042): €24.90/month (billed every 4 weeks) or €249/year. Badalona, L'Hospitalet de Llobregat, Sant Cugat del Vallès and Esplugues de Llobregat: €27.90/month or €279/year.

No. There is no deposit and no upfront cost on any plan.

Within 14 days of installation: the EU withdrawal period applies and you get a full refund. Notice period: two months' written notice; the subscription stays active during that time. Within the first 12 months: a one-off €75 early-termination amount may apply to cover the installation cost. It isn't a deposit and doesn't apply during the withdrawal period, if we're at fault, or if the unit is defective.

Subscription: no deposit or upfront cost; installation, all filters, maintenance and service calls included; free relocation within the service area; the unit belongs to Oasly; no minimum term.

Buying: €699 with installation in Barcelona, or €629 for the machine only (self-installed). The unit is yours; you buy replacement filters yourself.

For purchase customers (subscribers get all filters included): composite pre-filter every 12 months, about €35–€40; reverse osmosis membrane every 24 months, about €90–€100; remineralization filter every 12 months, about €40–€45. That's roughly €75–€85 a year, plus €90–€100 every second year for the membrane.

Right here on oasly.shop, or send us your postal code on WhatsApp (+34 689 44 85 08) and we'll take it from there.

Usually within 1–5 days of signing up. Morning slots 9:00–13:00, afternoon slots 15:00–19:00, and some Saturdays. Ask on WhatsApp if it's urgent.

In Barcelona city (all districts, postal codes 08001–08042) and in Badalona, L'Hospitalet de Llobregat, Sant Cugat del Vallès and Esplugues de Llobregat. We can often serve nearby areas too: send us your postal code on WhatsApp and we'll check.

A 230 V power outlet under or near the sink. A cold-water supply line (standard kitchen connection). Under-sink space of at least 45 × 45 × 45 cm. A drain connection for waste water. The standard filtered-water faucet needs a ~1.3 cm (13 mm) hole in the worktop or sink. The 3-way faucet upgrade (€79.90) replaces your existing tap and delivers both filtered and regular water, with no extra drilling.

For the standard faucet, yes: a small hole of about 1.3 cm, in a spot we choose with you, usually near the existing tap. If you'd rather not drill, we seal the hole with a matching cover plate when the service ends, or you can choose the 3-way faucet (€79.90), which replaces your existing tap and is yours to keep.

Usually 45–90 minutes. The technician checks the site, connects the water supply and drain, installs the faucet, powers on and tests the system, runs the initial flush (15–30 minutes), shows you how it works and checks the TDS reading.

With the "machine only" purchase (€629, installation not included), yes. You get a detailed manual, video tutorials and WhatsApp support. You'll need basic plumbing confidence, a drill with a 13 mm bit for the faucet (unless you use the 3-way option) and an adjustable wrench. If you're not confident with plumbing, we recommend the €699 option with installation in Barcelona.

Many renters use Oasly. The installation involves a small hole or a 3-way faucet swap, plus reversible connections to the water supply and drain. Options for renters: the 3-way faucet (we reinstall your original tap when you leave), the standard faucet with a cover plate when service ends, or written approval from your landlord.

Subscribers: relocation within the service area is free. Send us your move date and new address on WhatsApp; we collect the unit and reinstall it at your new home. Purchase customers can move it themselves or use a plumber; we can recommend one.

Yes. The "machine only" option (€629, self-installed) ships by courier across mainland Spain and the Balearic Islands, with WhatsApp support for installation questions. Replacement filters are available here on oasly.shop.

A 600 GPD (gallons per day) tankless reverse osmosis (RO) system with alkaline remineralization. Unlike traditional RO systems with bulky storage tanks, the tankless design is compact, avoids stored water, and delivers fresh filtered water on demand. It fills a 330 ml glass in about 10 seconds and is rated at up to 2,270 litres a day.

Reverse osmosis uses a semi-permeable membrane to reduce ions, unwanted molecules and larger particles in drinking water. The Oasly system pushes tap water through a membrane with pores of about 0.0001 micron: small enough to reject dissolved salts, metals and most other contaminants while water molecules pass through.

Figures from independent SGS report NBF25-0016876-01 (NSF/ANSI 58-2023 unless stated). Heavy metals: lead 99.8%, arsenic 99.9%, mercury 97.1%, chromium VI 99.6%, cadmium 99.6%, copper 99.3%. PFAS ("forever chemicals"): PFOS 99.6%, PFOA 99.4%. Chlorine 99.5% (tested to NSF/ANSI 42-2023). Chloramine and trihalomethanes are also reduced but were not part of the SGS panel.

Yes. Microplastics are typically 1–5,000 microns; the RO membrane pores are about 0.0001 micron, so the membrane reduces them. Microplastics were not part of the SGS test panel, so we don't quote a reduction figure for them.

Barcelona tap water meets EU drinking-water standards and is safe to drink. People filter it for other reasons: taste and hardness (the water is hard, which gives it a distinct taste and leaves limescale), chlorine used for disinfection affects smell and taste, and convenience: unlimited drinking water at the tap, with no bottles to buy, carry or store. We don't claim your tap water is unsafe.

Composite pre-filter: every 12 months (sediment, chlorine). RO membrane: every 24 months (the deep purification). Remineralization filter: every 12 months (minerals and taste). Subscribers don't need to track anything: we schedule the changes. Purchase customers order replacements on these intervals from the installation date. Heavy use or poorer incoming water can shorten the lifespan.

Water straight off an RO membrane tastes flat because the minerals are gone. The final stage adds calcium, magnesium and potassium back, so it tastes like water and comes out slightly alkaline. The minerals are there for taste; we don't present the water as a nutritional supplement.

The water is filtered by reverse osmosis, remineralized with calcium, magnesium and potassium, and can be boiled as normal. Always follow the formula manufacturer's instructions and your paediatrician's advice on preparing bottles; many recommend boiling water even when it's filtered. We don't make health claims about our water for infants.

Yes: rice, pasta, soups, stocks and sauces, with no chlorine taste and less limescale in pans and kettles.

Bottled or delivered water is treated elsewhere, stored in plastic and transported to you, so it can run out and needs floor space. Water filtered at the tap comes from your own mains and is filtered the moment you open the tap, with nothing stored. Our prices are published: €24.90/month, €249/year, or €629–€699 to buy the unit outright, with unlimited water.

A jug uses activated carbon only, which improves taste and odour. Oasly uses carbon plus a reverse osmosis membrane with 0.0001 micron pores, then remineralizes the water. It's unlimited on demand (no refilling a 2–3 litre jug), filters are changed yearly instead of every 1–2 months, and we measure your TDS before and after installation.

Published prices with no hidden fees, no deposit, tankless equipment, WhatsApp-first support, monthly, yearly or purchase options, installation usually within 1–5 days, free relocation within the service area, an independent SGS lab test, and a TDS reading before and after installation.

Subscribers: WhatsApp us on +34 689 44 85 08. We diagnose remotely where possible, schedule a free service visit if needed, and replace the unit if it can't be repaired. Purchase customers: WhatsApp support for troubleshooting; the 3-year EU statutory conformity warranty covers defects; service visits after that are charged separately.

OASLY AQUA, S.L. is a water filtration company based in Barcelona (CIF B22655765, Carrer del Degà Bahí 28, 08026 Barcelona). WhatsApp +34 689 44 85 08, email support@oasly.es.