Watts 0121327 Relief Valve 30067439-890 meeting stringent industry safety and

meeting stringent industry safety and performance standards for modern high-efficiency and modulating appliances

What is the purpose of the double diaphragm in this model

While it is a universal service thermostat

it is recommended to install a 3-amp inline fuse on the secondary side to protect the coil from shorts in the field wiring

or Comfortmaker systems

Watts 0121327 Relief Valve 30067439-890 meeting stringent industry safety andThe Watts 0121327 (Model LF3L 100) is a high performance 3 4 inch pressure relief valve designed specifically for emergency protection against over pressure conditions in water heaters and storage tanks. Featuring a Lead Free copper silicon alloy body, this valve ensures compliance with low lead regulations while providing a durable solution for residential and light commercial applications. It is engineered with a pressure relief setting of 100 psi