Tecmark Pressure Switch For Hot Tub 3902

Tecmark pilot duty adjustable hot tub heater pressure switch rated for 1 amp at 120 volts, 72VA pilot duty @ 24VAC.

Details:

• Brand: Tecmark
• Model: 3902
• 1/8″ threads (3/8″ actual O.D)
• 1-5 PSI adjustable
• 2 terminals no common
• Maximum 1A @ 120 VAC, 72 VA Pilot Duty @ 24VAC

Also replaces: 3965, 36142, 3902, 3903, 34-0178, 6560-869.

Product note:
This hot tub pressure switch requires adjustment for the size and pressure of the specific hot tub it’s being used in, easy to follow instructions included.

• Returns: Final sale

The Tecmark 3902 Pressure Switch in a hot tub or spa is a pressure sensor that is mounted onto the heater housing, or very close to the exit point of the heater. It’s a safety switch with the sole purpose of sending a signal to the circuit board to shut off the heater if low pressure (low water flow) occurs to protect the heater from overheating and burning out.

In a hot tub, pressure is an easy way to determine flow rates through the pipes, pump and heater. Some spas also use a Flow Sensor, in addition to (or instead of) the Pressure Switch, to be sure water is flowing properly for the heater to operate safely.