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To work properly a tap needs at least 1 bar of pressure and a conventional shower of 2 or 3 bars. But if one takes a shower while the other draws water from the kitchen sink and the dishwasher is running, the pressure may not be enough. To avoid the inconvenience of a trickle of water running from the shower while you are all soaped, you must install a booster!

What is the function of a booster?

A booster can increase the water pressure in your sanitary water distribution system. It allows you to keep sufficient pressure even when you draw at the same time from several water points. (Bathroom, kitchen, washing machine or dishwasher, etc.).

A booster is useful in the following cases:

  • For increase the pressure of your current installation when the pressure delivered by the drinking water network is insufficient.
  • When installing new water points: Creation of a new bathroom, a toilet, etc.
  • If you have a rainwater collection device with a tank or if you use water from a spring or well, you will need a suppressor to use this water for domestic use (Automatic watering, WC).
  • It is advisable when the installation of a swimming pool for the use of certain equipment.

How does a booster pump work?

A booster is actually a pump that will not only pump water but will send it back with more pressure than a regular pump.

  • Installed on the water supply pipeit draws water from the network and sends it back with a determined pressure in your pipes.
  • For the well management or a rainwater collection tank, the submerged or surface pump, will be coupled to an individual booster to give a sufficient and constant pressure.

The booster is equipped witha pressure switch (or pressure switch) that will regulate the pressure level and thus control the start and stop of the pump.

The pump may or may not be coupled with a reservoir (or pressure vessel or expansion tank).

  • A tankless booster is more compact, but the pump should work as soon as you take a drop of water. This material will be enough if you only want to water your garden or for a specific use. It is less suitable for managing your entire water distribution system.
  • With a tank, as soon as it is full, the pump stops automatically and you have a reserve of water under pressure. The pump is thus less stressed. The balloon also helps prevent water hammer which in the long run damages your installation.

The different types of tank of a booster group

The pressure booster or tank consists of a solid metal shell or fiberglass / polypropylene. Inside, you find a compressible gas and water under pressure. It is the pressure switch that regulates the water supply according to the programmed minimum and maximum pressures.
The size of the balloon is based on your water needs.

You find 4 types of blower tanks: A bladder, diaphragm, galvanized or stainless steel.

  • Bladder booster tank: This is the most common. The bladder is actually a soft pouch that inflates when filled with water from the pump.
    Depending on the use you want to make, the bladder is either dedicated to watering or for drinking water. In this case, it must be food grade. In all cases the water will not be in contact with the metal walls of the tank or with the compressed gas contained in the tank.
  • Diaphragm or diaphragm booster tank: The reservoir contains a flexible membrane that separates it into two parts. Above is the compressed gas and below the water sucked by the pump. As in the bladder tank, the water never comes into contact with the gas.
    At equal volume, the capacity of the diaphragm tank is greater than that of the bladder. Depending on the model, it is or is not food grade.
  • Galvanized booster tank: It is made of galvanized steel, which is a guarantee of durability and resistance to corrosion. Having no bladder or diaphragm, it therefore has a larger storage capacity.
    This tank contains an initial volume of air. When the water comes into the tank the pressure increases. The latter goes down naturally when water is drawn off.
  • Stainless steel booster tank: With or without bladder, the stainless steel tank is mainly used for wet or aggressive use. It is ideal for outdoor installation. But beware then the risk of frost in winter.

How to choose your booster? This choice depends on your current or future installation if you plan to add water points and your water and pressure requirements.


Video Instruction: How to Install a Water Pressure Booster - This Old House