Watts LF4L-150 3/4 lead Free poppet type pressure relief valve w/ test lever and 3/4 NPT female drain outlet


This relief valve is used in residential applications to protect against excessive pressure on domestic storage tanks and tankless water heaters. It consists of a lead free body construction with 3/4 inch NPT threaded male inlet and 1/2 inch NPT threaded female (drain) outlet, test lever, and stainless steel spring. It is ANSI Z21.22 approved, ASME rated and design certified and listed by CSA. The pressure relief is set at 150 psi (10.3 bar).

-maximum working pressure psi: 150psi

- lead Free Copper Silicon Alloy body material

-ASME approved

-Test lever included

-Inlet connection type-male threaded

-Inlet connection size - 3/4 in

-Inlet and outlet thread type - NPT

-GPM-when relieved: 7

-Outlet connection size - 3/4 in

-Outlet connection type - female threaded

-pressure steam discharge capacity: 500,000 BTU per hr