Watts 174A-3/4-40

Watts 174A-3/4-40 relief valve delivers reliable overpressure protection for residential heating and water heating systems. The compact 3/4-inch connection and 40 PSI relief setting provide precise safety release to prevent damage from excessive pressure. Engineered for durability, this pressure relief valve handles up to 800,000 BTU appliances and features robust construction designed for long service life. Catalog number 0274479 ensures easy compatibility with Watts systems and replacement parts.

• 3/4" NPT connection size compatible with standard piping and fittings for quick installation.
• 40 PSI relief setting provides reliable protection against overpressure in boilers and water heaters.
• Capable of handling up to 800,000 BTU, suitable for high-output residential systems.
• Durable metal body and corrosion-resistant internals for long-term performance and safety.
• Watts part number 0274479 ensures straightforward replacement and accurate compatibility.