Tecmark Spa Heater Pressure Switch 3903-DF replacement
- 1-5 psi 7-35kpa adjustable SPST
- Found in a large number of spa and pool heaters
- On/off device that controls heater operation
- Utilise a diaphragm to read the water pressure signal to convert to electrical signal
Variants: found on/near the heater assembly
3902 - 1Amp, 1-5psi Adjustable, 1/8" NPT 3903 - 1Amp, 1-5psi Adjustable, 1/8" NPT 3903-BP 3Amp, PSI Factory Set Non-Adjustable, 1/8" NPT 3903-DF 1Amp, 1.5psi fixed, 1/8" NPT
To be fitted by a qualified electrician, pool or spa technician only. Spa Store will not be liable for incorrect installation, damage or injury caused by an unqualified person installing this part.