Tecmark pressure switch 3037P CX Whilst this looks the same, IT IS NOT the type commonly fitted to Balboa heaters. (Image for illustration only - looks identical)
Very common Tecmark pressure switch found in Gecko, Hydroquip, Balboa and other spa systems. The latter version of this switch will be found carrying the 3903 code. Also known as the Hydroquip 34-0178.
Tecmark pressure switch, 4000 series. The 4037P is a main switch that can be used in place of these different codes : 70-1005 4010P 4136P-EW Used on many spa brand systems.