Low hot water pressure in 2 of 3 sinks

[Pinkgirl]

Trying to figure out why our bedroom sink in our 2014 meridian Itasca works great. Pressure good on cold and hot water. The hot water heater is under this sink. The kitchen sink, bathroom sink and shower work great with cold water but trickle stream on hot. Fill valve in normal position, water heater bypass tried all ways, tried city water vs tank same result, water filter replaced, drained water heater, blew air through lines all seem clear and still no hot water pressure except in bedroom.

[OldWEB]

Not knowing where your H2O lines run, one possible 'kink' in this situation is a slide has kinked the line. Try closing (or opening) the slides to see if this remedies it.

[Pinkgirl]

Thanks. We will be sure to try this. Willing to try anything and everything! We did follow lines and blow air through and air came out well just not water but as I said, we trying any and all suggestions.

[Unplanned Tourist]

You could also try taking the taps apart and checking for blockage. Sometimes deposits will come out of the water heater and lodge in tight spots.

[Pinkgirl]

We took apart the lines and we were able to blow air through all of them and out the faucet heads so lines seemed clear.

[Ray,IN]

Remove all faucet aerators, soak in a 50% white vinegar mixture overnight.

[onebrit]

Having read your post, I don't think the aerator is your problem as you said cold water pressure was good only hot water was showing a restricted flow. Definitely a restriction after the bedroom sinks not knowing the routing of your plumbing if the plumbing is teed at the bedroom, I think you need to check the flow at that point just to confirm that the water pressure is good going to other sinks other than breaking the lines at each tap that are slow just to confirm flow is good going into the taps. I had similar issue a while back where I wasn't getting hot water and it turned out that the check valve in the tank was my problem not saying this is what you have.
I would look at your plumbing diagram and prove flow at each point.
Good Luck
Onebrit

[Pinkgirl]

Back at it again! Is there a check valve in the actual tank or is it the pressure relief valve? We replaced valves on outside today - water flow valves and still nothing. My husband has been studying diagrams for 2 weeks now. We even took lines apart and air flow blew out well through lines. We are coming to conclusion do we need to replace hot water heater???

[onebrit]

Hi, there is a check valve at the tank usually on the back where the hot water pipe attaches to the tank this check is designed to save filling the hot water tank with anti-freeze when winterizing, but ours was the cause of restriction that prevented hot water from coming out of the tank altogether. Your issue doesn't sound like ours given you said you were getting good hot water flow to another sink. If no how water at all then that check could well be the problem.
Good Luck hope you find the problem soon.
Onebrit

[Old-Biscuit]

.....our bedroom sink in our 2014 meridian Itasca works great. Pressure good on cold and hot water. The hot water heater is under this sink. The kitchen sink, bathroom sink and shower work great with cold water but trickle stream on hot


IF the issue was at the Water Heater then the Bedroom sink would also have trickle of Hot water NOT work Great

Water Heater Tank has a T&P Relief Valve in OUTSIDE Compartment
Just like residential water heaters it is a safety device

RV water heaters can also have CHECK VALVE in the HOT Outlet 'nipple' screwed into the backside of tank----hot water line connects to that 'nipple'
That hot water line provides hot water to the entire RV hot plumbing system
If the Check Valve was clogged, failing then bedroom sink should not have any hot water either.

With Bathroom sink faucet ON (hot side) and getting HOT water....Open another faucet HOT side.
Do you still only get a trickle but Bedroom sink faucet still flows HOT?????

When you blew air thru the lines........were did you blow it out?
Thru the Hotside of the faucets or thru an open line?


Kitchen, bathroom, shower faucets may be clogged on the hotside.
DO you have an outside shower....does hot water flow from it?

[Pinkgirl]

Did not check for change with multiple hot faucets running

Blew out through faucets but do not remember if faucets were set to hot or cold

Could a faulty vacuum flushing breaker be a possibility?
It appears to have a hot line running to it

Same trickle at outside shower in wet bay

[cbeierl]

This should be the Plumbing Diagram for your coach. You may also want to look at the Drainage Parts Identification List and Water Parts Identification List to see what all the cryptic labels represent.

Note that you can zoom way in on the plumbing diagram for a better view.

[Pinkgirl]

Thanks he has been studying this for two weeks now trying to replace valves but so far nothing. So glad he owns an auto repair shop and is mechanical. Just rv stuff is so different and new.

[Old-Biscuit]

Doesn't appear to be ANY shutoff valves EXCEPT for valves at each sink/shower faucets....Hot & Cold Shutoffs

And Hot/Cold Low Point drain valves