2oldman wrote:
enblethen wrote:
The water heater needs an air space near the top. Water should not be over the pressure relief valve port.
How do you control that?
Normal filling of water heater will establish the air pocket by design of tank and position of dip tubes.
See previous picture.......
Over time the air pocket can be absorbed into water........then you will need to re-establish the air pocket or pressure will increase due to expansion of water when heated (typically PRV will weep when this occurs).
To re-establish air pocket
Turn off water supply
Open hot side of faucet to relieve line pressure
Hold open PRV via lever until water stops running out
Let PRV snap close
Turn on water supply
Close faucet
