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11-01-2021, 12:47 PM
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#1
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Member
Join Date: Apr 2020
Posts: 64
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2005 Revolution LE - Hot water heater bypass
In the process of winterizing - while trying to run antifreeze thru the water pump and into the faucets, I have found that no matter how I have the bypass and drain valves positioned, my hot water tank fills up with antifreeze.
Pic posted of my hot water heater and (what i believe to be) the bypass and drain valves. Bypass
What am I missing here? I am assuming this is just me being dumb and missing something.
Thanks!
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11-01-2021, 02:33 PM
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#2
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Senior Member
Fleetwood Owners Club Freightliner Owners Club American Coach Owners Club
Join Date: Oct 2014
Location: Wyoming, Delaware
Posts: 375
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Hi FunCrzd,
Your photo is identical to my 03 Rev. The upper valve is the bypass and the lower is the drain.
The bypass valve is set in the correct direction to not fill the water heater. It appears the nut on the lever is tight and not slipping.
How much resistance do you feel when you rotate the valve? It could be possible the valve stem is broken internally. Just a guess.
Dave
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11-01-2021, 02:56 PM
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#3
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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My 07 has another valve way back in there toward the rear bottom of tank.
__________________
2007 Fleetwood Revolution LE 40V
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11-01-2021, 03:04 PM
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#4
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Member
Join Date: Apr 2020
Posts: 64
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Quote:
Originally Posted by Mr. Dave
Hi FunCrzd,
Your photo is identical to my 03 Rev. The upper valve is the bypass and the lower is the drain.
The bypass valve is set in the correct direction to not fill the water heater. It appears the nut on the lever is tight and not slipping.
How much resistance do you feel when you rotate the valve? It could be possible the valve stem is broken internally. Just a guess.
Dave
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I thought so too...Feels like there is some resistance, but not a whole bunch. Guess I hadn't considered that the valve could be broken! Odd part is that the tank fills when the valve is in this position. Almost wondering if there is some "custom" plumbing that went on.
Directly above the bypass valve in the picture, there is a T with a hose that runs to the upper fitting that goes into the water heater.
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11-01-2021, 03:05 PM
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#5
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Member
Join Date: Apr 2020
Posts: 64
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Quote:
Originally Posted by Tha_Rooster
My 07 has another valve way back in there toward the rear bottom of tank.
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Interesting, I will see if I can find one back there! Thanks.
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11-02-2021, 06:38 PM
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#6
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Senior Member
Join Date: Dec 2017
Location: Charlotte, NC
Posts: 532
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Our coach did the same thing couple years ago. Found a bad check valve on the outlet port of the hot water tank. The check valve was leaking letting water backfill the tank from the outlet line.
__________________
2002 American Eagle 40M
ISL400 / Spartan MM
2003 Jeep Liberty/2019 Jeep Trailhawk
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11-02-2021, 07:33 PM
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#7
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Senior Member
Join Date: Nov 2015
Posts: 26,820
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Quote:
Originally Posted by Jthigh
Our coach did the same thing couple years ago. Found a bad check valve on the outlet port of the hot water tank. The check valve was leaking letting water backfill the tank from the outlet line.
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THIS^^^^^^
Hot Outlet has a check valve in 'nipple' screwed into tank
If is suppose to stop backflow into WH Tank when in BYPASS
Check valve bad (stuck open, O-ring dislodged etc)
*Provided Cold Inlet valve is closed
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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11-03-2021, 08:56 AM
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#8
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Member
Join Date: Apr 2020
Posts: 64
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Quote:
Originally Posted by Old-Biscuit
THIS^^^^^^
Hot Outlet has a check valve in 'nipple' screwed into tank
If is suppose to stop backflow into WH Tank when in BYPASS
Check valve bad (stuck open, O-ring dislodged etc)
*Provided Cold Inlet valve is closed
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Well now I feel better. I have been staring at the plumbing wonder how in the heck water wouldn't fill up the tank. Next stop - check valve.
Thanks!
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11-09-2021, 01:13 PM
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#9
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Junior Member
Fleetwood Owners Club
Join Date: Dec 2020
Posts: 17
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Our 2015 Discovery 40 X did the same thing
Quote:
Originally Posted by Jthigh
Our coach did the same thing couple years ago. Found a bad check valve on the outlet port of the hot water tank. The check valve was leaking letting water backfill the tank from the outlet line.
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I suspect the same thing mine did the same thing. I tok my bypass valve off to test and it was fine i suspected a check valve or bleeding back through a faucet somewhere. anyway ran antifreeze through then low pressure air to push out any remaining.
__________________
2015 Fleetwood Discovery 40x 8.9 Cummins turbo.
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11-10-2021, 07:51 AM
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#10
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Member
Join Date: Apr 2020
Posts: 64
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Update - appears to have been the check ball valve on the water heater itself (or lack there of). Instead of replacing the valve, I just removed the hose to the valve and capped the t-fitting that fed the valve. Everything worked as it should.
Just a possibility on the lack of a valve - I replaced the water heater this past spring and the bypass worked the previous winter, so I am wondering if the new water heater (and new valve/fitting) are not of the one way variety. Some have pointed out in this and other threads having 3 valves in their bypass plumbing.
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11-10-2021, 01:01 PM
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#11
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Junior Member
Join Date: Aug 2019
Posts: 18
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Cut the line coming out of water heater and put in a shut-off valve. That's what l did.
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