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Ships within 48 hours · Estimated delivery Sep 7 - Sep 12
Requires a ozone and water connection
Fits with a mini dim plug
Lower chemical use
Length: 2010mm
Tecmark Spa Heater Pressure Switch 3903-DF replacement Test Strips Requires a ozone and waterTecmark 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
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