Weil McLain 510-312-021 Temperature Control Els PW 17895 extending the service life of

extending the service life of the motor bearings

fitting seamlessly into the existing valve body architecture without modification

7 inches (170 mm) of clearance

its poppet-style design is optimized for tankless water heater safety and storage applications where pressure-only relief is required by local code

Weil McLain 510-312-021 Temperature Control Els PW 17895 extending the service life ofThe Weil McLain 510 312 021 High Limit Temperature Control is a critical safety component designed for precise thermal regulation in hydronic heating systems. This SPST (Single Pole Single Throw) aquastat operates on an automatic recycle basis, ensuring consistent performance without manual intervention after a high limit event. It features an adjustable temperature range of 140 220F with a 30F fixed differential, providing a reliable buffer to