When equipped with the factory-installed 13A15 vent limiter

Reliable Construction: Designed to meet rigid OEM standards for quiet operation and shaft durability

Stick to the 121°C OEM specification to ensure proper protection levels

significantly lowering operational costs and energy draw compared to legacy AC motors

it utilizes sleeve bearings and a thermally protected OAO (Open Air Over) enclosure to prevent overheating during continuous operation

Watts 0121566 Valve 318973-401 When equipped with the factory-installedThe Watts 0121566 LF174A relief valve is a 2 inch lead free pressure relief valve designed for high capacity hot water, boiler, hydronic, and commercial plumbing system applications. Rated for 100 PSI pressure relief, this Watts LF174A relief valve is commonly installed to help protect piping systems, storage tanks, and process equipment from excessive pressure conditions that can damage components or compromise system safety. Engineered for