1.5psi D-Tec 1
Technical bypass tool for some Hot Springs heaters.
Heater pressure switch 73995 for Watkins Hotsprings and Caldera. Easily identifiable from the style, shape and numbers on the switch. No other pressure switch looks like this. If your switch is square, it's this switch - simple. It can have a sticker with an SPS code. This is not to be followed by the exact number, but it helps to identify. ALWAYS IN...
Fitted to every Balboa pressure switched heater. Probably the most common pressure switch in European spas.
Tecmark pressure switch (6560-871) - 3amp Whilst this looks the same, IT IS NOT the type commonly fitted to Balboa heaters.
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 4010P and 70-1005 are the same as the 4037P Used on ACC systems amongst others.