Reduced Hot Water Flow

[Wxman]

A new one for me. Very reduced water flow at all hot faucets only. Cold is normal everywhere.
Cold input line to heater looks good, no kinks etc, from T to heater. Same for output line from heater to T .
Didn’t notice any issue during dewinterization. Didn’t notice issue during campground setup, and I ran hot side to insure tank was full.
My only thought at moment is the check valve on heater output. Can/do they fail as in restricting outflow?
After return home I will disonnect input at heater and check flow. Curious if those check valves can fail in this manner.
Thanks

[skids]

Originally Posted by Wxman

(snip)
My only thought at moment is the check valve on heater output. Can/do they fail as in restricting outflow?
After return home I will disonnect input at heater and check flow. Curious if those check valves can fail in this manner.
Thanks

I think you are on the mark. Bad check valve. You might tap on it with a wrench to see if you can free-up the mechanism (ball bearing I think). But it would only help diagnose the issue as the valve would need replaced anyway.

[ggilbert]

What about the hot water heater bypass valve. Our camper has two valves you turn to put hot and cold water in a loop and bypas the hot water tank to winterizing. Maybe those valves are not open fully.

[LuckyDuck]

It’s unlikely if it is affecting all of the hot faucets, but you might check the screens to make sure there is no sediment or debris impacting the flow.

[Rustic Eagle]

When was the last time the HWH was flushed out?

Just a thought.

Bob

[Wxman]

Thanks all. I have ordered a valve and am hoping for the easy fix. I did play with bypass valve but everything was working and bypass hadn’t been touched before problem started.
I have had screens clog before, but cold water is fine at the faucets, only hot affected.
Cheap / easy enough, on this camper anyway to change and hope for the best.