Watts 174A-3/4-40 Pressure Relief ValveWatts 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

cost-effective replacements in common residential setups

Used On Item Valve and compatible with AFRB and AFRX models

Temperature Range: 45–86°F (7–30°C) for reliable control

Designed for efficient zone control

Natural to LP conversion kit

and ducted systems where reliable performance and easy integration are required

Its robust design withstands vibrations

MX131LF is a trusted 2-1/2 inch flanged lead-free mixing valve designed for reliable hot water control in home plumbing

Locked Rotor: 80 A at 120/240 V

front bearing gasket

Compatibility: Designed for Armstrong 12M55 air conditioners and similar blower assemblies requiring a shaded-pole motor

36-inch length for flexible routing and mounting