the 110865 is specifically a natural gas pilot kit

effectively breaking the 24V control circuit to the gas valve if it detects flame rollout or excessive heat buildup near the burner assembly

A fast-acting fuse will likely blow immediately upon system startup

Engineered with a Single Pole Single Throw (SPST) normally open configuration

facilitating rapid diagnostic checks and internal maintenance without damaging the hardware

McDonnell & Miller 221 Water Feeder R-22 the 110865 is specifically aThe McDonnell & Miller 221 Water Feeder (Part Number 126600) is a heavy duty mechanical make up water feeder specifically engineered for boiler receiver tanks in commercial and industrial hydronic systems. This float operated unit provides precise proportional feed action, maintaining critical water levels without the need for complex equalizing connections. Built to handle a maximum vessel pressure of 35 PSI and a water supply pressure up to 150 PSI,