What Does a Pressure Switch Do in a Water System?


Most homeowners know that water pressure systems have various components, but not many understand what each component does. One of the essential components of a water system is the pressure switch. This article provides an in-depth explanation of what a pressure switch does in a water system.

What is a Pressure Switch?

A pressure switch is an electrical component found on a water system’s control box that is responsible for turning a water pump on or off. The switch consists of two wires, one of which is connected to the pump, and the other to the pressure gauge.

How Does a Pressure Switch Work?

A pressure switch works by sensing the pressure in a water system and triggering the pump on or off accordingly. It is set up to detect when the water pressure falls below a particular level, at which point it turns the pump on to restore the pressure to the required level.

Once the pressure switch detects that the pressure has reached the optimum level, it switches off the pump, and the system returns to standby mode, awaiting the next drop in pressure.

What Are the Benefits of a Pressure Switch?

A pressure switch brings several benefits to your water system, including:

  1. Maintains constant pressure: The pressure switch ensures that water pressure is maintained within a precise range, providing consistent water flow to your faucets and appliances.
  2. Saves energy: A pressure switch ensures that your pump only runs when needed, thus reducing energy consumption and ultimately saving you money on electricity bills.
  3. Increases pump longevity: Since the pump only operates when needed, the pressure switch helps extend its lifespan by reducing wear and tear.


A pressure switch is an essential component of a water system that helps maintain optimal water pressure, increase energy efficiency and saves you money. Understanding how it works and its benefits will enable you to make informed decisions when it comes to your water system’s maintenance.


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