Two appliances in an Indian home are fixed to walls that are wet, close to water and connected to both the plumbing and the electrical system: the geyser in the bathroom and the water purifier in the kitchen. Both are usually bought after the walls are tiled, and both are usually fixed wherever the plumber or the company technician finds a convenient spot on installation day. The results are visible in many homes: a geyser hanging directly above the shower head where every bath sprays it, a power point at knee height in the splash zone, an RO purifier above the hob where steam and heat cook its filters, or a purifier whose tap is so close to the counter that a bottle cannot fit underneath.
Getting the placement right is mostly a matter of planning three things before the tiles go on: the height and position of the appliance itself, the position of its water connections, and the position and rating of its electrical point. Each decision affects safety, convenience and maintenance for the life of the appliance. This article sets out the heights used in good Indian practice, in millimetres above the finished floor level, for storage geysers, horizontal geysers in false ceilings, instant geysers, wall-mounted RO purifiers and under-sink purifiers, with the reasons behind each number.
The heights here are consistent with the other dimension guides on this site — the bathroom plumbing guide, the water heater types guide and the switch and socket height guide. India has no single rule that fixes the height of a geyser or a purifier; the National Building Code of India 2016 (Part 8 for electrical installations and Part 9 for plumbing) and IS 732 govern how services are designed and installed, and the appliance manufacturer's installation manual always takes precedence for clearances and fixing. Electrical and plumbing work for both appliances should be done by a licensed electrician and a qualified plumber.
How these appliances arrived in Indian homes
For generations, hot water in Indian homes meant a vessel heated on a chulha or a copper boiler fed by wood or coal, carried in buckets to a bathing area. Electric immersion rods — dropped into a bucket — became common in cities in the second half of the twentieth century, and they remain in use despite their real risk of electric shock. Wall-mounted electric storage geysers spread through urban homes as concealed wiring and tiled bathrooms became normal, followed by instant electric heaters, gas geysers in LPG and piped-gas cities, and solar water heaters on independent houses in sunny states. The Bureau of Energy Efficiency's star labelling programme now covers electric storage water heaters, which made standby heat loss something buyers can compare.
Drinking water followed a similar path, from clay pots and boiled water to candle filters, then UV purifiers and, from the late 1990s and 2000s onwards, reverse osmosis (RO) purifiers for areas with high dissolved solids in groundwater and tanker supply. Today a typical urban kitchen has a wall-mounted RO or RO-plus-UV unit, and premium kitchens increasingly use under-sink purifiers with a dedicated tap. Both trends added a new appliance to a wall that was never planned for it — which is exactly why placement now needs to be part of the design.
| Appliance | Typical capacity or size | Typical location | Key placement number |
|---|---|---|---|
| Vertical storage geyser | 10–25 L; ≈ 350–450 wide × 450–600 high | Bathroom wall, outside the spray | Base ≈ 1800 mm (1700–1800 for tall 25 L units) |
| Horizontal storage geyser | 15–25 L; ≈ 300–360 diameter body | Above a bathroom false ceiling or high on the wall | Access panel ≥ 600 × 600 mm below it |
| Instant electric geyser | 1–6 L | Kitchen sink or basin | Base ≈ 350–450 mm above the counter or basin |
| Gas geyser (instant) | Rated in L/min | Outside the bathroom, in a ventilated space | Never inside a closed bathroom |
| Solar water heater | 100–200 L per day for a family | Roof, with tank above the highest outlet | Short, insulated hot line to the bathrooms |
| Wall-mounted RO purifier | ≈ 250–400 wide × 400–550 high | Kitchen wall beside the sink | Base ≈ 1200–1300 mm (350–400 above counter) |
| Under-sink purifier | ≈ 300–450 wide × 350–450 high | Inside the sink base cabinet | Dispensing tap on the counter or sink deck |
Storage geyser: the standard bathroom height
A vertical storage geyser is normally hung high on the bathroom wall with its base at about 1800 mm above the finished floor. That height does three things. It keeps the appliance above head height, so nobody bumps into it. It keeps it well above the zone that gets wet from the shower and from splashing at the WC and floor level. And it leaves the wall below free for the shower mixer, the WC and the basin. For a taller 25 L unit under a 2400 mm false ceiling, the base may drop to about 1700 mm so that at least 100–150 mm remains above the top for fixing and inspection. Heights are always measured from the finished floor, not the bare slab; if the floor screed and tiles are not yet laid, the site should mark a finished floor reference line on every wall first.
Position along the wall matters as much as height. The geyser should not sit directly above the shower head or inside the area enclosed by the shower glass, where it will be sprayed every day; it is better placed on the WC or basin side of the room, or on the wall outside the shower glass, with the hot pipe carried to the shower mixer inside the wall. It should not be above the door swing, and it should be on a wall that can carry the load: a filled 25 L geyser weighs roughly 35–45 kg including its water. Brick, block or RCC walls with the manufacturer's anchors are suitable; gypsum board, thin cement-board partitions or hollow blocks need a designed backing or a different location.
Water connections and the safety valve
A storage geyser has a cold inlet and a hot outlet. In most Indian wall-mounted models both connections come out of the underside, so the wall points — a cold supply with a stop valve and a hot outlet — are placed close to the base of the geyser, typically 100–200 mm below it and about 150–300 mm apart, and connected with short braided flexible connectors. The hot line then runs inside the wall to the shower mixer and, where planned, to the basin mixer. Hot-water pipes should be in a material rated for hot water, such as CPVC, and long runs should be insulated so that the first litres of each bath are not wasted waiting for hot water.
Every storage geyser is supplied with a pressure-relief or multi-function valve on the cold inlet. It releases water if the pressure or temperature rises too far, and it must never be removed, blocked or replaced with a plain fitting. Its discharge should be piped to the floor drain or over the floor trap so that the occasional drip does not run down the wall. Where the building's water pressure exceeds the geyser's rating — common in high-rise towers fed by pressure pumps or low floors under a tall overhead tank — a pressure-reducing valve is needed; the plumber should check the supply pressure against the rating on the geyser's label. In hard-water areas, a scale-inhibiting filter on the cold inlet extends the life of the element and tank.
Electrical point and switch
The geyser point is placed high, at about 1800–2000 mm, beside the geyser rather than directly under or above it, so that the appliance can be wired without a long flexible cord and the socket stays out of the shower's reach. The switch is best placed outside the bathroom, next to the door board at 1100–1200 mm, with an indicator lamp so that everyone can see when the geyser is on; where it must be inside, it should be high and well outside the wet zone. A typical 2 kW storage geyser draws about 9 A at 230 V and is normally connected through a 16 A socket or a double-pole switch on a 2.5 sq mm circuit with its own MCB, behind a 30 mA RCCB, with proper earthing. The licensed electrician should size the circuit to the actual heater rating under IS 732 and the manufacturer's manual.
Horizontal geysers above false ceilings
In many flats the bathroom has a false ceiling at about 2300–2400 mm, hiding the drainage pipes of the flat above, the exhaust duct and sometimes the geyser. A horizontal geyser — a long cylindrical tank designed to lie on its side — fits into this void when the space between the false ceiling and the slab is at least about 450–600 mm, as it often is in buildings with 2850–3000 mm floor-to-slab heights. This keeps the bathroom wall clear and is common in compact bathrooms.
It is acceptable only if three conditions are met. First, the geyser must be fixed to a masonry or RCC wall with the manufacturer's brackets, never hung from the false-ceiling framing. Second, there must be an access panel of at least about 600 × 600 mm in the false ceiling directly below it, so that the geyser can be inspected, its anode and valve serviced, and the unit removed without breaking the ceiling. Third, the safety-valve discharge must be piped to a drain, because a leak inside a closed void will soak the ceiling and may go unnoticed for weeks. The power point for a concealed geyser should be inside the void near the unit, with the switch outside the bathroom; the electrician should confirm that the point and wiring are suitable for a concealed location.
Instant geysers at the kitchen sink and basin
An instant electric geyser of 1–6 litres serves a single outlet — usually the kitchen sink or a basin — where only a small quantity of warm water is needed. It is mounted close to that outlet, so the hot water arrives within seconds. At a kitchen sink, the usual position is on the wall beside the sink, with its base about 350–450 mm above the counter (roughly 1200–1350 mm above the floor for an 850–900 mm counter), below or beside the wall cabinets and clear of the tap's splash. Some models are designed and approved for mounting inside the sink base cabinet; only those should go there, and the cabinet must allow access to the heater's valves and connections.
At a bathroom basin, a small instant heater is usually placed beside the mirror or under a wall-hung basin if the model is approved for that position, with the point nearby and well away from the shower. Higher-rated instant heaters draw more current than storage geysers — a 3 kW unit draws about 13 A at 230 V, and some instant models are rated much higher — so the electrician must size the cable, socket or isolator and MCB to the specific heater and confirm that the existing circuit can carry it. Instant heaters should never be run from an ordinary 6 A socket or an extension board.
| Item | Typical height (mm above finished floor) | Position | Why |
|---|---|---|---|
| Storage geyser base (vertical, 10–25 L) | ≈ 1800 (1700–1800 for tall 25 L units) | Outside the shower glass; WC or basin side | Above head height and the splash zone |
| Geyser top to false ceiling | ≥ 100–150 clear | — | Fixing, inspection and removal |
| Geyser power point | 1800–2000 | 150–300 to the side of the geyser | Short connection; out of spray |
| Geyser switch with indicator | 1100–1200 | Outside the bathroom door | Safe, visible, reachable |
| Geyser inlet and outlet wall points | ≈ 100–200 below the geyser base | ≈ 150–300 apart | Short braided connectors; valves reachable |
| Horizontal geyser in ceiling void | Void ≥ 450–600 deep | Bracketed to masonry; 600 × 600 access panel below | Service access; no load on the ceiling |
| Instant geyser at kitchen sink | Base ≈ 350–450 above the counter | Beside the sink, clear of splash | Hot water within seconds; reachable valves |
| Shower mixer (for reference) | 900–1100 | Inside the shower zone | Operable from outside the stream |
Water purifier: wall-mounted RO above the counter
A wall-mounted RO or RO-plus-UV purifier typically measures about 250–400 mm wide, 400–550 mm high and 250–300 mm deep, and dispenses water from a tap at or near its base. Its height is set by one practical test: a jug or a one-litre bottle must fit comfortably under the tap while it stands on the counter. That needs about 350–400 mm between the counter top and the base of the unit, which on an 850–900 mm counter puts the base at about 1200–1300 mm above the finished floor. Lower than that, bottles must be tilted; much higher, shorter family members struggle to see the water level and reach the tap.
Position along the wall is equally important. The purifier should be beside the sink — so that the inlet can be taken from the sink's cold supply and the reject water can drain into the sink waste — but not directly over the sink, where it is splashed and where a leak drips into the bowl unnoticed. It should be well away from the hob and chimney, ideally with at least about 600 mm between them, because heat and grease shorten the life of the filters and the plastic housing. It should be out of direct sunlight, which encourages algae in the tank and degrades plastics. And it needs a wall that can take its weight when full — a few kilograms of unit plus its stored water — with anchors suited to the wall.
Socket, inlet and drain for a wall-mounted purifier
A purifier needs its own socket beside the unit's mounting position, as this site's electrical planning guides note — never a shared adaptor behind the refrigerator or a cord stretched across the sink. The socket is usually placed at about 1450–1600 mm, beside the unit on the side away from the sink, so that the short power cord reaches without strain and no water can run onto it. Purifiers draw little power, typically a few tens of watts, so a 6 A socket on a general kitchen circuit protected by a 30 mA RCCB is normally enough; the electrician should confirm against the model's rating.
The water inlet is usually taken from the cold supply under the sink with a tee and a small ball valve, or from a dedicated angle valve on the wall behind or below the unit at about 1050–1150 mm. Either way, the valve must be reachable so that the supply can be shut off for servicing or a leak. The reject or drain line from an RO unit runs down to the sink waste, connected through a drain saddle above the trap, or — better — into a container so that the reject water can be used for mopping or plants. Where municipal supply pressure is low, many RO units include a booster pump; where it is high, a pressure regulator may be needed to protect the membrane. The installer should follow the manufacturer's pressure limits.
Under-sink purifiers and dispensing taps
Under-sink purifiers keep the kitchen wall clear, which suits modern kitchens with tall backsplashes and full-height wall cabinets. The purifier sits inside the sink base cabinet, beside the trap, and dispenses through a slim faucet mounted in a hole in the sink deck or the counter, or through a three-way kitchen tap that combines hot, cold and filtered water. The sink cabinet must be planned for it: a typical 800–900 mm wide sink base with a 560 mm internal depth can hold a compact purifier on one side of the trap if the bowl is not too deep and the cabinet has no drawers or a full-width shelf in the way.
The socket for an under-sink purifier should not be inside the wet sink cabinet if it can be avoided. It is better placed in the adjacent cabinet, through a grommet in the side panel, at about 300–450 mm above the floor, or on the back wall of the sink cabinet as high as possible and away from the trap and supply valves. The dispensing faucet needs a hole of about 12 mm or as specified, drilled before the counter is installed or with the correct core bit afterwards. Filters must be reachable from the front for replacement, which means not hiding the unit behind a pull-out bin.
Choosing the right purifier for the water
Placement is easier when the right type of purifier is chosen in the first place. The deciding number is total dissolved solids (TDS), measured in mg/L. IS 10500:2012, the Indian standard for drinking water, gives an acceptable limit of 500 mg/L for TDS and a permissible limit of 2000 mg/L in the absence of an alternate source. RO removes dissolved solids, but it wastes a share of the input water and is unnecessary where the supply is already low in dissolved solids; UV and UF treat microbial contamination without removing minerals. Point-of-use RO systems are covered by IS 16240. A water test before buying — easily done by a lab or a reputable dealer — prevents both over-treatment and under-treatment.
| Supply TDS (mg/L, typical guidance) | Typical source | Common choice | Placement notes |
|---|---|---|---|
| Below about 200 | Treated municipal supply | UV or UV + UF; RO usually not needed | Smaller units; little or no reject water |
| About 200–500 | Mixed municipal, some borewells | UV + UF, or RO with a TDS controller | If RO, plan the reject drain |
| About 500–2000 | Borewell, tanker water | RO + UV | Reject line to waste or a collection container |
| Above 2000 | Some groundwater sources | RO with pre-treatment; get specialist advice | May need a softener or central plant |
| Hard water (high calcium/magnesium) | Many Gujarat and Rajasthan borewells | Softener for the house; RO for drinking | Softener near the overhead tank or inlet |
The TDS bands above are common industry guidance rather than a code requirement, and the actual water test — including bacteria, hardness and any specific contaminants — should decide the system. Where an RO is installed, its reject water is a resource: in a typical home it can be collected for floor cleaning, flushing or plants, and some modern units recover more of the water than older designs.
Electrical sizing and safety
Water heaters are among the highest-wattage appliances in a home, and they operate in the wettest rooms. The guidance below is general and indicative; the electrical design must be done by a licensed electrician to IS 732 and NBC 2016 Part 8, Section 2, using the rating on the appliance's label and the manufacturer's instructions. A geyser should never be operated without proper earthing, and bathroom circuits should always be protected by a 30 mA RCCB (RCD).
| Appliance (typical rating) | Approximate current at 230 V | Typical wiring practice (confirm with electrician) | Protection |
|---|---|---|---|
| Storage geyser, 2 kW | ≈ 9 A | 2.5 sq mm copper, 16 A socket or DP switch, own circuit | Own MCB + 30 mA RCCB + earthing |
| Storage geyser, 3 kW | ≈ 13 A | 2.5 sq mm copper, 16 A socket or DP switch, own circuit | Own MCB + 30 mA RCCB + earthing |
| Instant geyser, 3 kW | ≈ 13 A | 2.5 sq mm copper, 16 A, dedicated | Own MCB + 30 mA RCCB |
| Instant geyser, higher rating | Per label — can be much higher | Heavier cable and isolator per manufacturer | Electrician to design the circuit |
| RO / UV purifier | Well under 1 A | 6 A socket on a kitchen circuit | 30 mA RCCB on the circuit |
| Geyser timer or smart switch | Must be rated for the heater load | Installed in the switch position outside | As above |
Gas geysers deserve a separate warning. A gas geyser burns LPG or piped natural gas and produces combustion gases including carbon monoxide; installed inside a closed bathroom, it can be fatal. If gas water heating is used, the heater must be installed outside the bathroom in a well-ventilated location, with a flue where the manufacturer requires one, by a trained installer, as this site's water heater guide explains. Immersion rods in buckets carry a real risk of electric shock and should be replaced by a properly installed geyser wherever possible.
What it costs
The appliance prices below follow the ranges already used on this site for geysers, solar water heaters and timers; purifier ranges are indicative for common branded domestic units. Installation, plumbing points and electrical points are extra and depend on how much wall chasing and pipework is needed. All figures are indicative October 2026 estimates.
| Item | Indicative cost (October 2026) | Notes |
|---|---|---|
| Electric storage geyser, 15–25 L | ₹6,000–15,000 | Plus fitting; BEE star rating affects standby loss |
| Instant electric geyser, 1–6 L | ₹3,000–7,000 | Kitchen sink or basin; check current rating |
| Solar water heater, ≈ 100 L per day (ETC) | ₹20,000–35,000 installed | Larger systems ₹35,000–50,000 |
| Geyser timer or smart switch | ₹1,500–4,500 | Heats water only before bath time |
| Wall-mounted RO or RO + UV purifier | ₹10,000–25,000 | Price varies with stages, tank and brand |
| Under-sink purifier with dedicated tap | ₹20,000–40,000 | Cabinet space and socket needed |
| Purifier annual service and filters | ₹3,000–6,000 per year | Depends on water quality and usage |
Where this is going
Three changes are already visible. Water heating is moving towards efficiency: better-insulated storage tanks under the BEE labelling programme, timers and smart switches that heat water only when needed, heat-pump water heaters in larger homes, and solar systems on independent houses. Purification is becoming more targeted: units with TDS controllers and mineral cartridges, under-sink systems with three-way taps, and, in larger homes and housing societies, central treatment plants that soften or filter water for the whole building. And both appliances are getting sensors — leak detection, filter-life indicators and energy monitoring — which make it even more important to place them where they can be seen, reached and serviced.
Placement rules for geysers and purifiers
- Mark a finished floor reference line before any point is fixed; measure every height from it.
- Hang a storage geyser with its base at about 1800 mm, outside the shower glass and never directly above the shower head.
- Leave at least 100–150 mm between the geyser and the false ceiling, and fix it only to masonry or RCC.
- Put the geyser point at 1800–2000 mm beside the geyser, on its own MCB behind a 30 mA RCCB, with the switch outside the bathroom.
- Keep the safety valve working and pipe its discharge to the floor drain; add a pressure-reducing valve if supply pressure exceeds the rating.
- Give a concealed horizontal geyser an access panel of at least 600 × 600 mm directly below it.
- Mount a wall RO with its base about 350–400 mm above the counter, beside the sink, at least about 600 mm from the hob, out of direct sun.
- Give every purifier its own socket on the side away from the sink, and a reachable shut-off valve on its inlet.
- Never install a gas geyser inside a closed bathroom, and have all electrical and plumbing work done by licensed professionals.
Frequently asked questions
What is the standard height of a geyser from the floor?
In Indian practice, a wall-mounted storage geyser is normally hung with its base at about 1800 mm above the finished floor. Under a 2400 mm false ceiling, a tall 25 L unit may need its base at about 1700 mm so that 100–150 mm remains above it for fixing and inspection. The geyser's own installation manual should always be checked.
Where should the geyser switch be placed?
Preferably outside the bathroom, next to the door switchboard at about 1100–1200 mm, with an indicator lamp. The geyser's power point stays inside, high at about 1800–2000 mm beside the geyser, so that the appliance can be connected without a long cord. Every bathroom circuit should be protected by a 30 mA RCCB.
At what height should an RO water purifier be installed?
For a wall-mounted unit, the base is usually about 1200–1300 mm above the finished floor, which on a standard 850–900 mm counter leaves 350–400 mm for a jug or bottle under the tap. Place it beside the sink rather than over it, away from the hob and out of direct sunlight, with its own socket beside it.
Can a geyser be placed above the false ceiling?
Yes, if it is a model suited to that position (usually a horizontal geyser), fixed to a masonry or RCC wall rather than the ceiling frame, with an access panel of at least 600 × 600 mm directly below it and its safety-valve discharge piped to a drain. The electrician should confirm that the power point and wiring are suitable for the concealed location.
Is it safe to install a gas geyser in a bathroom?
No. A gas geyser produces combustion gases including carbon monoxide, which can be fatal in a closed bathroom. If gas water heating is chosen, it must be installed outside the bathroom in a well-ventilated area, with any flue the manufacturer requires, by a trained installer.
Sources & standards
- Bureau of Indian Standards — National Building Code of India 2016, Part 8, Section 2 (electrical and allied installations) and Part 9 (plumbing services, including hot water supply)
- Bureau of Indian Standards — IS 732 (code of practice for electrical wiring installations)
- Bureau of Indian Standards — IS 2082 (stationary storage type electric water heaters)
- Bureau of Indian Standards — IS 10500:2012 (drinking water specification) and IS 16240 (RO-based point-of-use water treatment systems)
- Bureau of Energy Efficiency — star labelling programme for electric storage water heaters
- Manufacturer installation manuals for storage and instant water heaters and domestic RO purifiers (clearances, pressure limits, fixing) — follow the specific model
- Neufert, Architects' Data — kitchen and bathroom service zones
- Price ranges: indicative October 2026 estimates — confirm locally before budgeting
