Correct Placement of Pressure Switch and Gauge in a Sprinkler System

Where to Install the Pressure Switch

The pressure switch must be installed after the pump and before the pressure tank. It senses the pressure inside the tank and signals the pump to start when pressure drops to the cut-in setting and stop at the cut-out setting.

Gauge Location

Mount the pressure gauge after the pressure switch (on the tank side) so it reads the same pressure the switch sees. This allows accurate adjustment of the switch's cut-in/cut-out settings.

Typical Layout

Pump → Pressure Switch → Pressure Tank → Gauge → Irrigation Mainline

This arrangement ensures the switch controls the pump based on system pressure and the gauge gives you a true reading for setup and troubleshooting.