Tank in water heater leaking. Got a new one coming. Existing Atwood had check valves on both water lines. Are they needed What is the purpose of the one on the hot waterline
This is just a guess. Double safety. You don't want hot water getting into the cold. Also may have something to do with winterizing. All pure guess work form me.
Rick & Melissa Young & Dawson (RIP), 2011 Meridian 40U, FL XCL, ISL 380HP/DEF, Al 3000 MH, 2014 Honda CR-V, SMI AF1, Blue Ox TruCenter & tow equip.,EEZTire TPMS. Servants On Wheels Ever Ready. Best job we ever paid to do . (full time volunteers)
I just put "water heater check valve" into the Google search box at the top of this page. I was amazed at the number of hits I got. Apparently they can be a real trouble spot and there are a lot of suggestions for cleaning, etc.
Something else to "file" away in my brain.
2002 Itasca Suncruiser 35U