Water heater banging and surging

Hey guys, I'm having trouble with my water heater, a 15-year-old Rheem traditional tank heater with power vent. The heater is in the garage, ground floor level. When I turn on a hot water source on the third floor it starts making a rhythmic banging noise, THUNK-THUNK... THUNK-THUNK... almost like a heartbeat. While it's doing this, the hot water ebbs almost down to zero with the first THUNK and then surges with the second. And once it starts banging, even if I turn off the third floor faucet, it'll do the same thing with every water source in the house, until I clear it by shutting off the cold water supply to the heater for several seconds. I can also sometimes but not always clear it by turning the second floor tub on full blast. First and second floor hot water works fine until I turn on a third floor source, then it goes back to the THUNKing and surging. Anybody have any ideas what's going on and how I can fix it? Right now I have to shut off the cold water supply to the heater and leave it off just to wash my dishes (kitchen's on the third floor). Good thing it's a big tank! submitted by /u/PseudoLucian [link] [comments]

Hey guys, I'm having trouble with my water heater, a 15-year-old Rheem traditional tank heater with power vent.

The heater is in the garage, ground floor level. When I turn on a hot water source on the third floor it starts making a rhythmic banging noise, THUNK-THUNK... THUNK-THUNK... almost like a heartbeat. While it's doing this, the hot water ebbs almost down to zero with the first THUNK and then surges with the second. And once it starts banging, even if I turn off the third floor faucet, it'll do the same thing with every water source in the house, until I clear it by shutting off the cold water supply to the heater for several seconds. I can also sometimes but not always clear it by turning the second floor tub on full blast. First and second floor hot water works fine until I turn on a third floor source, then it goes back to the THUNKing and surging.

Anybody have any ideas what's going on and how I can fix it? Right now I have to shut off the cold water supply to the heater and leave it off just to wash my dishes (kitchen's on the third floor). Good thing it's a big tank!

submitted by /u/PseudoLucian
[link] [comments]