an open circuit suggests the protector has tripped or failed internally

provided the target outlet pressure falls within the 5-12" WC range

this seal is designed for use across the Bunn Ultra series

For contractors and technicians

Durable Construction: Features high-grade insulation and a terminal connector designed for HVAC sensor troubleshooting and vibration resistance

McDonnell & Miller 312200 Gasket an open circuit suggests theMaintaining the integrity of boiler water feeders and liquid level controls requires high performance sealing components designed for steam and hydronic environments. The McDonnell & Miller 312200 Gasket is a critical replacement valve bracket gasket engineered specifically for Series 21, Series 25A, and Series 27 units, including the 27W model. As the direct updated version for 311100, this part ensures a precision fit for mechanical water feeder