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and OT200 disconnect switches
or metal fatigue in high-cycle environments
When replacing failed units
When installing this HVAC blower fan replacement
Watts 0278480 Valve 321042-401 and OT200 disconnect switchesThe Watts 0278480 (Series 174A) is a heavy duty, 2 inch ASME Section IV certified pressure relief valve engineered for large scale hot water heating boilers and high capacity domestic supply systems. This high capacity safety device is set to a 125 PSI relief pressure, offering a massive discharge rating of 12,170,000 BTU hr. Designed for the rigors of mechanical rooms, its bronze body construction ensures long term durability and resistance to
