How to Install a Water Purifier


 – Zoom on the water purifier

 – Step 1: Assemble the station components

 – Step 2: Purge the system

 – Step 3: Cut the pipe

 – Step 4: Install the water purifier bypass

 – Step 5: Attach the purifier

 – Step 6: Turn on the water purifier

 Installing a water treatment plant is an economical and ecological way to improve drinking and non-drinking water quality. Depending on the situation, it is necessary to choose the appropriate purification system. The installation is then done on your pipes in a relatively simple way, thanks to the mechanical connections supplied with the station. No welding is necessary.

 Here is step by step how to install a water purifier with bypass on your pipes.

 Zoom on the water purifier

 You can install the purifier on the city’s water system or another source.

 Drinking-Water System

 The drinking water supply network is subject to controls that guarantee sanitary safety. However, installing a domestic water treatment plant on the water network of the house allows :

 – better maintenance of the domestic hot water system;

 – improved water quality. The water is softer, with a better taste and odourless.

 To find out which water treatments are used, check with your town hall, ask your supplier (indicated on the bill) or consult the Ministry of Health website.

 Rainwater, spring water, well water and borehole water

 – You must comply with regulated uses: you cannot use reclaimed rainwater for sanitary purposes, but you can use it for watering, car washing, water supply to toilets, etc. 

 For other water sources, a certified laboratory performs a water analysis to determine the filters required. Check with your local city hall to find out which labs are accredited.

 Different purification systems

 – Different scale filters reduce the deposit of scale in the pipes.

 – The activated carbon filter is often used in conjunction with another system. It purifies the water by absorption, making it possible to eliminate the organic compounds (resulting from dead leaves), the bad smells (chlorine, for example), etc. But it does not modify the mineral composition of the water.

 – Sediment filtration (with cartridge) removes fine particles suspended in the water. You can install the system at the city water inlet or the pump outlet for rainwater or well water. The filtration can be more or less okay (up to 1 µm).

 – The osmosis unit purifies the water through a fine membrane. This system offers healthy, highly purified water but at a low flow rate. It is installed near the sink.

 The ultraviolet sterilizer eliminates germs and bacteria in the water through ultraviolet rays in a watertight enclosure.

 Caution: Whatever the purification system, it must be regularly maintained (change filters, lamp, etc.) according to the manufacturer’s recommendations. Otherwise, you risk polluting the water!

Assembling the components of the station

1. Assemble the various parts according to the manufacturer’s instructions

 – Assemble the connections by inserting gaskets each time.

 Good to know: Tighten each connection without forcing; otherwise, you may damage the gaskets.

 2. Vent the system

 Before starting the plumbing work, you will have to:

 – Turn off the water at the main meter.

 – Flush the pipes by opening the faucets.

 3. Shut off the water supply

 Defer the length of the bypass

 – Measure the bypass, i.e. the tube between the two shut-off valves.

 – Remove one centimetre from this measurement.

 – Transfer this length to the water supply pipe.

 Make the cut

 Cut the pipe following your marks.

 – Use a pipe cutter if you have room to handle it.

 If there is no space, roll masking tape flush with the mark outside the cut. Then cut the pipe with a hacksaw using the tape as a guide.

 4. Install the water purifier bypass

 – Place the bypass between the 2 pieces of pipe by pushing both ends of the pipe about 5 mm into the bypass tees.

 – Screw the quick-release couplings onto the pipe with an adjustable wrench or open-end wrench.

 5. Attach the purifier

 Mark the location of the turntable

 – Place the plate between the elbows of the bypass.

 – Check that the turntable is level with a spirit level.

 – Mark the holes on the wall with a marker.

 – Remove the plate.

 Attach the plate and place the purifier.

 – Drill the holes at the marked locations.

 – Dust off and drive in dowels adapted to the type of wall.

 – Replace the plate and screw it in place.

 – Place your purification system on the plate.

 – For systems with filters, place the filters in their cases and screw them on with a plastic wrench (supplied with the system). Tighten the nuts with the wrench, but do not overtighten.

 Caution: If your water pressure is higher than 4 bar, you must install a pressure reducer upstream.

 6. Switching on the water purifier

 Observe the manufacturer’s instructions for the start-up. In general :

 – Open the valve at the station outlet and then the valve at the inlet;

 – close the house’s taps;

 – Open the general power supply;

 – Carefully check the tightness of the connections.

 The bypass installation allows or prevents the use of the station:

 – to use the station, the 2 valves of the station are open, and the valve used to supply water to the house remains closed;

 – conversely, the 2 valves of the station are closed, and the supply is open if you do not wish to use the station.

 Caution: Make sure to maintain your purifier regularly, according to the manufacturer’s instructions, to ensure its proper operation.


 Materials needed to install a water purifier.

    • Wrench $2
    • Copper pipe cutter
    • Paper pencil $0,50 
    • Tape measure $4
    • Bubble level $4
    • Drilling machine $30
    • Masking tape $1 per roll
    • Hacksaw $15
    • Screws and dowels From 0,50 $/piece
How to Install a Water Purifier

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