Skip to content

What to do when a shower pump turns on by itself

If your pump is starting up on its own there are few things you need to consider.

First determine if you have a universal (negative head) pump. These pumps are easily identified by a pressure vessel on the top of the pump.

A universal (negative head) pump turn on when they recognise a pressure drop in the system. A dripping tap or leak in the system can cause the system pressure to drop which would activate a negative head pump, even though all outlets are turned off. This is called ‘hunting’. When a pump is ‘hunting’ you will hear the pump switch on for a few seconds when no outlets are open. Find out how to test if your pump is hunting. 

A positive head pump doesn’t have a pressure vessel. These pumps are activated by a flow switch set to turn the pump when a natural flow rate (without assistance from the pump) of 2 litres per minute passes through the pump.

If you have a positive head pump that is turning on and off during use, this is most likely due to the water flow rate being insufficient to activate the pump.

View all FAQs

Chat Offline: Leave A Message Speech bubbles icon