Tecmark 4010P SPST pressure switch

Rated at 25A, this SPST Tecmark pressure switch is fully adjustable from 1 to 6 psi, and can handle a maximum current of 25A (enough for heaters with a maximum power of 5 kW).

Characteristics
Relay type: SPST. The circuit between the two spade connectors is closed only when the water pressure reaches the required threshold.
Pressure thresholds: from 1 to 6 psi
Maximum current rating: 25A
Thread: 1/8" NPT (outside diameter of 9,5 mm), like almost all pressure switches found in hot tubs.

The pressure switch is among the most important pieces of safety equipment found in your spa system. It constantly monitors water flowing through the heater and helps protect the integrity of critical components if ever a problem arises (like overheating).

Part numbers
Tecmark: 4010P