Watts LF100XL-4-150

Watts LF100XL-4-150 is a lead-free T&P relief valve designed to protect hot water systems from potentially dangerous, excessive temperature and pressure. With a dependable 3/4 inch connection and a precise 150 PSI rating, this valve features a long 4 inch stem for reliable operation, easy testing, and smoother integration into existing piping.

Constructed to meet modern safety standards, the LF100XL-4-150 uses lead-free materials to reduce contamination risk and improve durability. It is ideal for residential water heaters, boilers, and other hot-water applications requiring dependable protection. Model 0556000 provides traceability and compatibility with Watts safety products. Designed for easy installation with standard tools, it fits typical Watts setups and supports straightforward maintenance.

• Lead-free construction for potable water safety
• 3/4 inch connections for broad compatibility
• 150 PSI relief rating to guard against overpressure
• 4 inch stem for precise sensing and easier testing
• Model 0556000 for identification and compatibility with Watts safety devices