they require manual calibration

this unit features a hermetically sealed black Bakelite case that provides a permanent barrier against oil

the kit includes water glass

The Armstrong International B3038 Electrode Assembly is a high-performance replacement component engineered for precise water level sensing and flame monitoring

Lochinvar & A.O. Smith 100111891 Gas Valve 323269-701 they require manual calibrationThe Lochinvar & A. O. Smith 100111891 Gas Valve is a critical OEM replacement part engineered for high efficiency natural gas commercial water heaters and boilers. This K Series gas control valve is a direct replacement for obsolete part number 9007295005 and is essential for maintaining precise manifold pressure and air gas mixtures within the combustion chamber. Designed for compatibility with the Lochinvar BTH series (including BTH 400 and BTH 500