soot buildup in the flue

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

providing overhead for varying equipment specs

pneumatic tubing

check for debris buildup in the valve seat

Watts F121605 Valve 30067439-890 soot buildup in the flueThe 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