preventing overheating and ensuring the unit operates within peak efficiency parameters

Rated for a nominal capacity of 5

Designed with a 1/2" NPT connection

replacing a cracked or warped collector box with this genuine factory component restores the structural integrity of the combustion air circuit

Durable Construction: Forged brass body paired with a nickel-plated stem and high-torque motor provides long-term service in demanding environments

McDonnell & Miller 250-1-30 Valve 30067439-890 preventing overheating and ensuring theFor high performance hydronic heating systems, the McDonnell & Miller 250 1 30 (Part Number 181925) is a heavy duty 1" NPT pressure relief valve engineered to protect ASME Section IV pressure vessels. This bronze body relief valve is factory set at 30 PSI and provides a substantial 1,170,000 BTU capacity to prevent over pressure conditions in large scale boiler applications. Designed for maximum durability, it features an EPDM rubber diaphragm and