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03-12-2015, 12:56 PM
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#1
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Senior Member
Join Date: Sep 2014
Location: Preble county, Ohio
Posts: 261
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Backflow check valves for the shower
Anybody know where to get them? We are getting scalded by the shower when you turn off the water at the shower head. When you turn the water back on it's screaming hot for about 15 to 20 seconds. I was told that there needs to be backflow check valves in the supply lines but I'm not sure where to find them. Internet searching turns up a few but I don't know if that's them or not.
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2008 Silverado 3500HD 4x4 SRW Duramax Allison trans
2014 Cougar 327 RES "Campy"
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03-12-2015, 01:20 PM
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#2
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Senior Member
Join Date: Feb 2013
Location: MA
Posts: 3,153
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Not sure where to get them but I just point the water away for a couple seconds until the water is back to temp.
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2013 Premier 31BHPR
2014 F350 6.2L
Soon to be just DW and I
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03-12-2015, 02:03 PM
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#3
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,235
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Back flow valve will be at the "out" side of the hot water heater. I have always done the same, just point it away for a few seconds.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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03-12-2015, 05:38 PM
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#4
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Member
Join Date: Mar 2014
Location: Nooga
Posts: 64
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I'm looking at doing this as well. Our problem is cold water for the first 15 seconds. My camper is in storage so I have been delaying this project until we get ready to head out the first time this year.
From what I have read on line, get two 1/2 inch shark bite check valves from Home Depot, Lowe's, Ace or any hardware store (Should be about $15-$16 each). Cut the hot and cold feeder lines to the shower mix valve. Insert one valve on each line with the arrow on the check valve pointing toward the shower mix valve.
I would double check your feeder pipe size before you get your check valves to make sure you get the right size.
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Russ
2014 Alpine 3600RS
2007 Ram 3500 DRW Cummins 5.9L
2008 FLHRC 105th
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03-12-2015, 05:41 PM
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#5
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Senior Member
Join Date: Mar 2013
Location: Illinois
Posts: 581
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Scalding hot water at Shower head
We have the opposite problem, as our shower has cold water when you turn the shower off at the shower head. I understood this was because they setup the water heater winterizing bypass with only one valve?
I've considered doing the 2 valve fix, but doesn't seem to be that big of an issue - however, does someone have a diagram of where the valves would need to be placed? And more importantly, does it solve the problem? brrrr!
HEY Road-king, you beat me by 2 minutes!!!!
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Ed & Mary
2017 Cougar 333MKS
2015 RAM 3500 HD with 6.4L
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03-12-2015, 05:47 PM
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#6
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Member
Join Date: Mar 2014
Location: Nooga
Posts: 64
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Russ
2014 Alpine 3600RS
2007 Ram 3500 DRW Cummins 5.9L
2008 FLHRC 105th
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03-13-2015, 11:45 AM
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#7
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Senior Member
Join Date: Sep 2014
Location: Preble county, Ohio
Posts: 261
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Hey Road-King, thanks for finding that "mod my rv" article. That's exactly what I was looking for to cure the problem.
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2008 Silverado 3500HD 4x4 SRW Duramax Allison trans
2014 Cougar 327 RES "Campy"
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03-13-2015, 03:49 PM
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#8
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Member
Join Date: Aug 2014
Location: west columbia, sc
Posts: 86
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Thanks for the great idea. I usually just turn it away too but this fix seems pretty easy.
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2010 Cougar 318 SAB
2005 Ram 2500 5.9 Cummins
2010 Ultra Limited
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03-15-2015, 03:15 AM
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#9
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Senior Member
Join Date: Feb 2014
Location: Minnesota
Posts: 287
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I'll have to see how easy that mod would be to install on our trailer.
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03-15-2015, 01:27 PM
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#10
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,456
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It's probably just as easy and about the same cost to re-plumb the water heater with three cut-off valves.. and you don't have the issue of water trapped above the backflow valve.
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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03-15-2015, 10:15 PM
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#11
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Senior Member
Join Date: Jan 2014
Posts: 487
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Quote:
Originally Posted by Javi
It's probably just as easy and about the same cost to re-plumb the water heater with three cut-off valves.. and you don't have the issue of water trapped above the backflow valve.
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Water above the check valve will be impossible to get out to winterize the rig, come wintertime, without blowing the lines out with air, and some water will probably still be trapped in the mix valve or lines leading to it.
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Pilot for fun, Computer geek for a living, and happy 5er owner who wants more time to go play in the camper!
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03-16-2015, 06:25 AM
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#12
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Senior Member
Join Date: Sep 2014
Location: Preble county, Ohio
Posts: 261
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Not an issue if you pump RV antifreeze through the system....
__________________
2008 Silverado 3500HD 4x4 SRW Duramax Allison trans
2014 Cougar 327 RES "Campy"
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03-16-2015, 07:00 AM
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#13
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,456
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Quote:
Originally Posted by Campy
Not an issue if you pump RV antifreeze through the system....
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You are 100% correct Campy, but folks down here don't usually pump anti-freeze through the system. Most of us just blow the lines out cause we winterize 5 or six times a year. I know I do, because we often camp during the winter but have periods of temperatures in the low 20's and upper teens for a few days at a time.
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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03-16-2015, 08:37 AM
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#14
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Junior Member
Join Date: Jul 2010
Posts: 4
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What about changing the shower valve out to a new anti scald valve..
required in all new homes now........
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03-17-2015, 06:46 AM
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#15
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Senior Member
Join Date: Sep 2014
Location: Preble county, Ohio
Posts: 261
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Quote:
Originally Posted by Gumpster
What about changing the shower valve out to a new anti scald valve..
required in all new homes now........
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The newer valves used in homes is not the same issue that campers have. Homes just limit the mixing function so the temp can not be turned up too hot. The camper issue is backflow (either hot or cold) because we "shut off" the flow at the shower head valve and the pressure will equalize one way or the other, then when you turn the flow back on you get blasted with either really hot or really cold water.
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2008 Silverado 3500HD 4x4 SRW Duramax Allison trans
2014 Cougar 327 RES "Campy"
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