the D-9502-604 supports a broad field-selectable operating range of 3 to 13 psi

This means the internal switch closes as the temperature reaches the setpoint

pneumatic tubing

allowing you to choose between 30 or 60 minutes depending on the frost load of the application

Watts F121605 Valve 30067439-890 the D-9502-604 supports a broadThe Watts F121605 (LF340X 8 150) is a high capacity Temperature and Pressure Relief Valve designed specifically for large scale commercial water heaters and storage tanks. Featuring a 1 1 2 inch male inlet and female outlet, this lead free relief valve provides critical overpressure protection with a set pressure of 150 PSI and a maximum temperature rating of 210F. Engineered with an ASME Section IV rating, the F121605 delivers a high flow discharge