making it a preferred choice for combustion system maintenance and vacuum service

90" WC (water column)

specifically as a direct match for Jenn Air 80CR units

leading to inefficient burns or safety shut-offs

Fulton Boiler 2-40-001021 Relay 322057-301 making it a preferred choiceThe Fulton Boiler 2 40 001021 Relay is a specialized Low Water Cutoff (LWCO) control engineered to maintain critical safety parameters in legacy Fulton steam and hydronic systems. This 11 pin plugin relay operates on 120VAC at 50 60 Hz and integrates a dedicated test function, allowing technicians to verify circuit interruption without draining the system. Designed as a high reliability safety interlock, the 2 40 001021 utilizes NO NC powered contacts