This Already Pre-Set pressure switch is non-adjustable. The relay closes when the water pressure reaches 1.4 psi.
Characteristics
Type: SPST. The circuit between the two spade connectors is closed only when the water pressure reaches the required threshold.
Maximum current: 10A
Pressure thresholds: 1.4 psi
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
Presair : TNP418R-1.4PR
Other reference: 5-20-0024
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