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Old 10-18-2017, 01:46 PM   #1
Fritz57
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Default check valve or dom hw heater fail?

about a decade ago we redid the kitchen and added a Taco mix valve to fill turtle tanks (yes, plural, don't ask).
Since it was a mix valve I figured a check valve would be a good idea.

In the last 6 years, or so, we had the heating plant taken from 1 to 3 zones, and a new separate dom HW heater, 45 gal.

Recently, when we turn water on in one part of the house, the hot goes away from another area, kitchen sink or a bath.
I've started to notice the kitchen sink vacillates back and forth, hot and cold, when only hot is on.
And other issues like this when only one faucet is on.

I wonder if this is a dom hw heater issue or perhaps the check valve has failed?
..



Last edited by Fritz57; 10-18-2017 at 05:41 PM.
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Old 10-18-2017, 01:57 PM   #2
havasu
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I'd be checking your "check" valves, since they don't last forever.
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Old 10-18-2017, 02:03 PM   #3
Fritz57
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it is a Watts LF600 check. It's about 10 yo.

I also noticed there is some rust at the circ pump of 1 of the zones. Issue or not?

https://flic.kr/s/aHsm5XVDjT

last photo, left most zone/pump.

Last edited by Fritz57; 10-18-2017 at 05:41 PM.
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