Responsible for sensing the water flow coming into the heater. Sometimes these can leak or cause heaters to not ignite due to corrosion damage. Found in models (ICI, Viron250, Viron350, Viron450, Hurlcon HX, Hurlcon MX, Hurlcon JX, HiNRG175, HiNRG250 and HiNRG400.
Water Pressure Switch
