Tecmark Plastic Adjustable Spa Heater Pressure Switch 3 Terminals NO/NC Contacts - 4015p

Spa heater pressure switch to suit Compu-Heat spa heaters and others with 2 or 3 wires connected to the pressure switch.

3 terminals - NO/NC contacts - to suit low flow indicator light function on Compu-Heat spa heaters.

Tecmark 4015P adjustable pressure switch 1-5 psi
Normally open contact usually used for completion of the control circuit to allow heater operation once there is sufficient pressure
Normally closed contact usually only ever used / needed for the connection of an indicator / pilot light to show a 'no flow' error.

Replaces discontinued Len Gordon 800120 pressure switches