Watts LF40XL-5-3/4" Temperature and Pressure Relief Valve

Watts LF40XL-5-3/4" Temperature and Pressure Relief Valve delivers reliable, automatic reseating protection for commercial water heaters. This lead-free, cast brass valve combines precise temperature and pressure relief with rugged durability for demanding installations.

Designed for 3/4" inlet and 3/4" outlet connections with end connections: male thread x female thread, it operates within a set pressure range of 150–210 PSI and a temperature rating of 210°F. For steam service, it supports up to 205,000 BTU/hour, making it an ideal choice for high-demand systems.

Key features ensure safe, compliant performance:

• End connections: 3/4" inlet, 3/4" outlet; male thread x female thread
• Body material: Cast brass, lead-free
• Ratings: Set pressure 150–210 PSI; temperature 210°F; steam rating 205,000 BTU/hour
• Operation: Type Automatic Reseating with Lever
• Thermostat: Special thermo-bonded coating for durability
• Security: Tamper Resistant Bonnet Screw; Non-Mechanical Seat to Disc Alignment
• Standards: ANSI Z21.22, ASME, CSA, NB, HV, FHA, MIL-V-136-12D, Type 1
• Application: Commercial water heater