Wall Mounted Water Purifier: Buying Guide for Indian Kitchens

A wall mounted water purifier hangs on the kitchen wall, usually beside or above the sink, and dispenses from its own tap. It is the default in Indian kitchens because it keeps the counter free, needs no cabinet, and is easy for a technician to reach. The mounting style matters less than what is inside: choose by your input TDS, the stages, storage, monitoring and service.

Why wall mounted is India’s default

Walk into most Indian kitchens and the purifier is on the wall. That is not an accident:

• Counter space is for cooking. Indian cooking uses a lot of counter: chopping, grinding, rolling rotis. A purifier on the wall takes none of it.
• The cabinet below the sink is often damp or full. Many kitchens use it for cleaning supplies or a bin, and some have no cabinet there at all.
• RO needs a drain, and the sink has one. A wall unit near the sink keeps the reject-water line short and simple.
• Service is easy. A technician can open the unit and change filters without crawling into a cabinet.
• It suits renters. Fitting needs only a few screws in the wall, and the unit comes down cleanly when you move.

When wall mounted wins, and when it does not

Your situation	Wall mounted	Under sink	Countertop
Renting, may move in a year or two	Good fit	Possible, more plumbing work	Good fit
No usable cabinet under the sink	Good fit	Not possible	Good fit, uses counter
Small kitchen, counter is precious	Good fit	Good fit	Takes counter space
Modular kitchen, want a clean backsplash	Visible on the wall	Good fit, only a faucet shows	Visible on the counter
Tiled or stone wall you do not want to drill	Needs drilling	Needs a counter hole for the faucet	No drilling

Wall mounted wins for renters, kitchens without a usable cabinet, and anyone who wants easy service access and a display at eye level. It loses when you want the purifier out of sight in a finished modular kitchen: an under-sink purifier with a dedicated faucet, such as Boon Tap, suits that better. For the trade-offs in detail, read under sink vs wall mounted water purifiers and under-sink vs countertop purifiers. Renters should also see our water purifier guide for renters.

What to check before you buy

1. TDS rating vs your supply. Every RO membrane is rated for a maximum input TDS. Know your supply first: BIS IS 10500 sets 500 mg/L as acceptable and 2000 mg/L as permissible where there is no alternative source. Borewell and tanker water can be far higher than municipal supply.
2. Stages, and what each does. Look for sediment pre-filtration, carbon for chlorine and taste, RO for dissolved solids and UV for microbes. More stages are not better by themselves; ask what each one is for.
3. Storage size and LPH. Storage is how much purified water is ready at once; litres per hour (LPH) is how quickly it refills. A family that fills bottles in the morning needs both to keep up.
4. UV placement. UV can sit before the tank, inside it or at the outlet. Ask where it is and what it treats, so you know whether water is disinfected on its way into storage or on its way out.
5. Monitoring. A display of input and output TDS, and filter health, tells you the purifier is working rather than leaving you to guess.
6. Manual dispensing in power cuts. If dispensing depends on electricity, stored water is locked in during an outage. Ask how you get water out with the power off.
7. Service network. Ask who installs and services it: the brand’s own team or a third-party agency, and how quickly they respond in your city.
8. Warranty terms. Read what is covered and for how long, and what is excluded. A longer headline number with many exclusions is worth less than it looks.

Mounting height and kitchen placement

Where the purifier goes affects how easy it is to use and how long it lasts. A good spot is:

• Near the sink drain, so the reject-water line is short and not stretched across the kitchen.
• Within reach of a socket, ideally a dedicated, earthed socket. Avoid extension boards near water.
• Away from the stove. Heat and cooking fumes age the casing and components; do not mount a purifier above or right beside the hob.
• Out of direct sunlight, which warms the stored water and can encourage algae in any part that lets light through.
• At a comfortable height, with the tap easy to reach for the adults who use it most, and enough clearance under the nozzle for your tallest glass or bottle.
• With space around it for the technician to open the unit and change filters.

A worked example: Boon Homie against the checklist

Boon is a water-technology company founded in 2013 by ex-IIT Kanpur engineers, backed by the Technology Development Board (Govt. of India), NITI Aayog and Roca, with systems running in more than 4,000 organisations and 400+ hotels across nine countries. Here is how our wall-mounted RO, Boon Homie, answers each checklist item.

Checklist item	Boon Homie
TDS rating	CoreRO membrane rated for input up to 2000 TDS
Stages	5-stage UltraOsmosis: InletShield (5-micron grooved pre-filter), ProFlow (5-micron sediment and turbidity control), CarbonCorrect (chlorine and chemical taste), CoreRO, UV ProGlow
Storage and LPH	20 litres per hour into an 8-litre tank
UV placement	In-line LED UV before the tank
Monitoring	WaterAI: input TDS, output TDS, temperature, filter health, self-diagnostics; a cove light shows alerts at a glance
Power cuts	Patented manual filling: draw already-purified stored water by hand (purification itself needs power)
Service	Installed and serviced by Boon’s own team, not a third-party agency; installation is free
Warranty	2 years, plus a 10-day money-back guarantee and free shipping

Beyond the checklist, Homie adds three Water Profile buttons (Active, Daily, Bev) and three Mineral Enhancers (Balance, Uplift, Reboot), each on its own cartridge separate from the main filter, so switching never touches purification. It has soft-touch button dispensing, a glass front with an LED display, a stainless-steel nozzle, structured fittings and internal noise damping. Homie is ₹21,900 at the time of writing, on pre-order with deliveries from 15 October 2026. Boon Homie Pro adds instant hot water (no cold) at ₹25,900 at the time of writing.

When Homie is not the right choice

• Your supply is above 2000 TDS. Homie’s membrane is not rated for it.
• You want the purifier hidden. In a modular kitchen where only a faucet should show, an under-sink unit is the better format.
• Your water is already low in TDS and microbes are the only concern. You may not need RO at all.
• You need chilled water from the purifier. Neither Homie nor Homie Pro cools water.
• You need exact dimensions now. Ask Boon for the wall space Homie needs before you plan a tight spot.

Frequently Asked Questions

Is a wall mounted water purifier better than under sink?

Neither is better in general; they suit different kitchens. Wall mounted suits renters, kitchens without a usable cabinet below the sink, and anyone who wants easy service access and a display at eye level. Under sink suits finished modular kitchens where you want only a faucet on the counter. The purification inside matters more than the mounting style.

Where should a wall mounted water purifier be installed?

Near the sink drain so the reject line is short, within reach of an earthed socket, away from the stove’s heat and out of direct sunlight. Mount it at a height where the tap is easy for adults to reach and your tallest glass or bottle fits under the nozzle, with space around it for filter changes.

What TDS can a wall mounted RO purifier handle?

It depends on the RO membrane, not the mounting style. Each membrane is rated for a maximum input TDS, so check the rating against your supply before you buy. Boon Homie’s membrane is rated for input up to 2000 TDS, which matches the BIS IS 10500 permissible limit for drinking water where there is no alternative source.

What storage capacity do I need in a water purifier?

Think about how much purified water your household uses at its busiest moment, such as filling bottles in the morning, and how fast the purifier refills. Storage is what is ready at once; litres per hour is how quickly it recovers. Boon Homie, for example, purifies at 20 litres per hour into an 8-litre tank.

Is a wall mounted purifier good for rented homes?

Usually, yes. Fitting needs a few screws in the wall plus an inlet connection, a drain line and a socket, and the unit comes down cleanly when you move. Check your rental agreement about drilling, and ask the installer to use the existing water line with a removable connector so you can restore it when you leave.

Does a wall mounted purifier work during a power cut?

It cannot purify without power, because RO needs an electric pump. Whether you can still get stored water out depends on the design: some purifiers lock stored water in when dispensing is electric. Boon Homie has patented manual filling, which lets you draw already-purified water by hand from its 8-litre tank during a power cut.