HydroQuip 1 Amp Pressure Switch, 34-0178

This is the HydroQuip 1 amp pressure switch, part number 34-0178. It is the direct replacement for the original switch, ordered by the factory number so there is no guessing about which version you are getting.

What a pressure switch does

A pressure switch watches water pressure and makes or breaks an electrical circuit accordingly. Only when there is pressure in the line does the switch close and let the equipment it protects run. When pressure drops away, the switch opens again. That is what keeps things from firing up dry.

When to replace it

Switches wear out. A contact that no longer closes leaves the equipment dead even though everything else is working, and a switch that sticks or chatters makes it cut in and out. If you have confirmed the system has proper flow and it still will not run reliably, the switch is the part to change.