Tecmark 3903 Pressure Switch 1 Amp 1-5 PSI

Tecmark model 3903 universal pressure switch SPST 1 Amp rating. Works from 1-5 PSI (adjustable). Has 1/8 inch NPT/MPT pipe threaded connection.

Does not come with any screws.

This Model 3903 pressure switch means it is field adjustable vs. the 3903-BP that is factory adjusted and the set point cannot be changed on those.

This 3903-DF is also the 1 amp adjustable version that works between 1PSI and 5PSI for standard hot tub application.

1/8 inch NPT threaded connector fits the 1/8 inch pressure switch tap on spa heater manifolds or on separate tailpieces that have the 1/8 inch pressure switch tap.

Adjustable psi with flat blade screwdriver.

Need teflon tape? Best to wrap the threads of the pressure switch with teflon tape to assure a good seal at the pressure switch tap on the heater manifold.

3903 / 3903-DF / 3903DF are the same switch type

Or see 3903-BP or 3903-EADE