Forum Discussion
Old-Biscuit
Jun 02, 2015Explorer III
Bobbo wrote:Old-Biscuit wrote:Puttin wrote:
If everything that Bisquit says doesn't do it and it turns out to be the check valve at the bottom of the water heater you can just take a fine stiff wire and pry the guts out of it (after you've taken the output line off of it). In that case, I hope yours is easier to access than mine was. Sometimes they make a humming noise also when you turn any hot faucet on.
Depending on who installed check valve (if used) ....could be in hot outlet vs cold inlet
The check valve will always be on the hot outlet at the top of the water heater. If it is on the cold inlet, it will still let the water heater back fill with the pink antifreeze, at least until it pressurizes to stop further flow.
Check valves are not only used or winterizing.......they are also used on cold inlet to stop backflow of hot water into cold water system (hot water can be at higher pressure due to heating) especially in a 'closed system'
So check valves can be cold inlet, hot outlet....depends on what they are being used for.
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