Which models use this 3/8" hex orifice

Optimized Flow Control: Supports the full 1

it must be assembled with a compatible 1720 Series magnet head and a 1980 Series thermocouple

higher-capacity overhead

systems using appropriate couplers

Lochinvar & A.O. Smith 100151693 Frame End Freon Which models use this 3/8"The Lochinvar & A. O. Smith 100151693 Frame End (also identified by part number JKD6187) is a critical structural component engineered specifically for the V baffle assembly in high capacity commercial boilers and water heaters. This heavy duty frame end provides the necessary lateral support to maintain the alignment and stability of the internal baffle system within the heat exchanger. By rigidizing the V baffle runner, it prevents mechanical