Watts Temperature and Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in Connection Size

A Watts temperature and pressure relief valve protects water heaters and storage tanks from excessive temperature or pressure. It automatically opens to relieve steam or water when conditions exceed safe limits, preventing catastrophic failure. This ASME Section IV rated brass valve is common in commercial and residential hot water systems.

The Watts 3/4 LF 100XL-4 is an ASME Section IV temperature and pressure relief valve with a brass body. It has a 3/4 in MNPT x 3/4 in FNPT connection size. The manufacturer part number is 3/4 LF 100XL-4. It is designed for use on water heaters and storage tanks requiring overpressure and overtemperature protection.

3G Electric supplies the Watts 3/4 LF 100XL-4 temperature and pressure relief valve to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Watts valves and support procurement across 14 industrial departments. Contact us for availability and lead time.

Install the Watts valve directly into the water heater or tank tapping using thread sealant on the male NPT end. Ensure the discharge pipe is directed downward and terminates in a safe, visible location per local codes. Never install a shutoff valve between the relief valve and the tank. Test operation after installation by lifting the lever briefly.