Installing a water softener: the steps to install it like a pro

By | September 26, 2021

Having a water softener at home is the ideal solution to remove limescale from the water and benefit from softened water all year round. You will thus protect your equipment from the damaging effects of limescale but also your skin from dryness or other skin problems. With this guide, learn how to install this filtration system like a pro!

Equipment required for installing a softener

Before embarking on the installation of a water softener, it is necessary to check that you have all the elements necessary for its installation. For ideal conditions, we advise you to have at your disposal:

Equipment to provide

  • A water softener
  • Specific salt
  • A roll of Teflon
  • A small tube of food-grade silicone grease
  • A pad of steel wool
  • Sanitary supply hoses

Installing the softener in 4 steps

Prepare the implantation area

To protect your softener from impurities, we recommend that you install a pre-filter on the main water inlet, after the meter. This is where the connection will be made. However, it is advisable to keep a second line of non-softened water for the garden and for the kitchen (drinking unsoftened water is preferable). It will also be necessary that the following be available near the connection:

  • An evacuation pipe for regeneration wastewater and overflow
  • An electrical outlet with a circuit protected by a 30 mA differential circuit breaker

At the last moment, you can turn off your water heater and cut off the general water supply. Open a few taps to lower the pressure. You can go to step 2 of the installation of your softener.

Prepare your softener by equipping it


Thanks to this bypass system, the softener can be isolated from the rest of the water network to allow maintenance and repair in the event of a breakdown. For installation, check that the bypass is fitted with theoretical gaskets, brush them with a little food-grade silicone grease, push in fully and clip the assembly.


Once the bypass is fixed you can connect the drain elbow, the overflow drain pipe and the drain pipe with a pin . For the latter two, do not forget to allow sufficient length to reach the evacuation point.

Connect your softener to the water supply and drainage system

  • Place your softener near the wall and make a mark on your water inlet pipe to provide the cut necessary for the nesting of the device. If you are using flex fittings rather than welds, you will need to allow for a larger spacing to accommodate a flex screen.
  • Cut the pipe and rub the ends where the connection will be made with steel wool.
  • Secure the two sanitary supply hoses at the level of the cuts with the biconical coupling system.
  • Position your softener, checking that it is straight with the level.
  • Connect the hoses to the bypass, hard water inlet on the right and soft water outlet on the left.
  • Connect your softener to the evacuation system. The two softener pipes must not be inserted into the drainpipe, but suspended at 4 cm using retaining clamps.

Test and commission


This is an important moment! First, close the bypass to avoid problems in the event of a leak, then re-open the general power supply. Check that the water is flowing from the cold water taps and then gradually open the bypass valve. If all goes well, you can test by turning on the hot water. After a few moments, you can turn off the taps and check that there have been no leaks at the fittings.


Salt is an essential element for the proper functioning of your softener. It regenerates the resins used to filter water. To insert the salt into the softener, first turn off the water using the bypass and place the dose of salt in the tank. Close the cover and remove the bypass valve. You can now enjoy softened water!

The installation of a softener remains technical and requires some basic plumbing to be done correctly. For more peace of mind, call an approved technician from the Aqua-direct network who will be able to make the appropriate adjustments to the quality of your water and make the appropriate connections. We are present throughout France, do not hesitate to contact us to find out more!

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