Immersion wells allow heat transfer while protecting the sensing bulb from contact with the controlled medium and permit removal of the sensing
bulb for testing or replacement without draining the system.

MC347-2M Immersion well, 1/2" pipe conn., 3/8" insertion dia., 1-1/2"
deep,replaces Honeywell 121371A, 12369A (use on
L4006,L6006,L8124,L8148, R8182D, E, F)

MC347-3M Immersion well, 3/4" pipe conn., 3/8" insertion dia., 1-1/2"
deep, replaces Honeywell 121371B, 123870A (use on L4006,L8124,L8148,R8182D, E, F)

MC347-6M Immersion well, 3/4" pipe conn., 3/8" insertion dia., 4-1/2"
deep, replaces Honeywell 122555A, 123870A (use on water heaters with long insertion)

MC347-7M Immersion well, 3/4" pipe conn., 3/8" to 5/8" insertion dia., 4-
1/2" deep, replaces Honeywell 122555E

MC347-8M Immersion well, 3/4" pipe conn., 3/8" insertion dia., 3" deep,
replaces Honeywell 12137M (use on water heaters with long insertion)

Universal Well Adaptor

Eliminates the need for draining the system when replacing obsolete hot water controls. Adapts modern controls to old wells with inside diameters of 1/2”, 3/4”, 11/16”.

MC308M Permits replacement of obsolete hot water controls without draining the boiler system.  Adapts modern controls to old style well with inside diameters of 1/2”, 3/4” or 11/16”.