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03-12-2013, 03:35 PM
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#1
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Senior Member
Alpine Owners Club
Join Date: Aug 2010
Location: Cincinnati, OH
Posts: 281
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Water Heater Bypass Valve Issue
2005 Alpine Coach 36 FDDS
I cannot get water to the hot water faucets. I placed the bypass valve on the cold water line to horizontal (which has always been the summer position) and no water comes out the hot water side of the faucets. If I open the safety blow off the water flows out it OK so the tank is full.
Has anyone had a bypass valve go bad or break so whatever? Thats the only thing I can figure.
If I put the bypass valve in the winter (bypass) position (handle pointing up) water flows to both sides of the faucets but with the bypass valve handle horizontal (summer position) water only comes out the cold water side.
I winterized this coach at least 12 times in the past 7 years and have never had a problem like this. It seems to simple but all I can figure it to be is a bad bypass valve. My coach has no bypass valve on the hot water line out of the water heater as the owners manual says. It only has one bypass valve on the cold water inlet line and it has always worked OK.
Any ideas would be appreciated.
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03-12-2013, 03:38 PM
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#2
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Community Administrator
Join Date: Aug 2009
Posts: 53,543
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Is there an outside shower handle open ? That's a common solution to no hot water flowing.
Cliff
__________________
Cliff,Tallulah and Buddy ( 1999-2012 )
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03-12-2013, 04:37 PM
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#4
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Member
Join Date: Oct 2011
Posts: 60
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03-12-2013, 04:41 PM
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#5
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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Part of the water-heater by-pass "system" includes a really cheap check-valve that threads into the exit pipe coming out the top [inside cabinet] of the water-heater. Sometimes the spring inside the check-valve comes a part and cuts off the flow of hot water exiting the tank. If you dont really need to by-pass the hot water heater, just eliminate the check-valve and reconnect the pex feed line directly to the water heater. If you need to preserve the ability to by-pass, you will need to find a new check-valve. May get lucky at a "box store" but you will probably need to go to an RV shop for the valve--its an "RV thing".....
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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03-13-2013, 08:53 AM
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#6
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Senior Member
Alpine Owners Club
Join Date: Mar 2009
Location: Surprise, AZ
Posts: 836
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Ditto - exact same problem I had ... I also left the check valve out ... hot water has worked fine ever since ... I winterize with air so no need for the check valve.
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Bob Bowers (Surprise, AZ)
2003 Alpine Coach 40' FDTS
2014 Jeep Cherokee Lattitude
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03-13-2013, 02:23 PM
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#7
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Senior Member
Join Date: Nov 2007
Location: Charleston, WV
Posts: 3,469
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My coach has 2 bypass valves, one on the cold fill and one on the hot outlet, as described in the manual. I do not have a check valve in the hot outlet. Was this a change WRV made by replacing the second bypass valve with this check valve in later coaches?
__________________
John and Mary Knight
2015 Newmar Ventana 4311 - wheelchair accessible
2015 Cadillac SRX Luxury AWD
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03-19-2013, 04:00 PM
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#8
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Senior Member
Alpine Owners Club
Join Date: Aug 2010
Location: Cincinnati, OH
Posts: 281
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I got it all fixed. I took out the check valve and removed the guts. Then I replaced the tee in the hot water line with another tee bypass valve - just like in the old days. In my opinion the check valve was a stupid idea. Only my opinion - you understand.
Thanks to everyone who helped me out.
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03-28-2013, 05:52 PM
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#9
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Junior Member
Join Date: Jan 2011
Posts: 22
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I have the same problem, it started yesterday. Suddenly lost the hot water, cold works fine. Where is this check valve and where can I get a replacement? Camping world?
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03-28-2013, 06:04 PM
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#10
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Registered User
Fleetwood Owners Club Freightliner Owners Club
Join Date: May 2011
Location: Silicon Valley, CA
Posts: 1,857
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Check Valves
They're there for a purpose. If all the water drained out of your WH and you plugged it in.........Poof! Heating element gone. (done it. Always carry a spare.)
Get brass check valves if you can. The plastic ones are crap.
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03-28-2013, 07:14 PM
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#11
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Senior Member
Join Date: Nov 2007
Location: Charleston, WV
Posts: 3,469
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Quote:
Originally Posted by Muddypaws
They're there for a purpose. If all the water drained out of your WH and you plugged it in.........Poof! Heating element gone. (done it. Always carry a spare.)
Get brass check valves if you can. The plastic ones are crap.
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How can you "accidentally" drain all the water out of the hot water tank? The only time mine is empty is when I drain it "on purpose" to winterize.
__________________
John and Mary Knight
2015 Newmar Ventana 4311 - wheelchair accessible
2015 Cadillac SRX Luxury AWD
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03-28-2013, 07:19 PM
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#12
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Senior Member
Texas Boomers Club
Join Date: Dec 2003
Location: Mo/Texas
Posts: 3,555
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Must be an Alpine thing. We don't have that problem with our Newmar. Just kidding.
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03-28-2013, 08:04 PM
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#13
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Registered User
Fleetwood Owners Club Freightliner Owners Club
Join Date: May 2011
Location: Silicon Valley, CA
Posts: 1,857
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Check Valves, Part II
Accidents happen. Over the 40 something years we've been RVing we've managed to toast several heating elements. And replaced at least 3 check valves.
Neither of them on our current rig. Yet.
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03-28-2013, 08:09 PM
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#14
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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Didnt know Newmar products had water heaters--next thing you are going to tell me you have a toilet [inside] too--dang fancy rig there [smile]. Anyway, JD, the valve in question is located at the top of the hot water heater [inline at the outlet, right where the pipe [pex] exits the heater [this is on the back of water heater, inside the kitchen cabinet]. CW may have it but more likely a large RV sales/repair company.
Not sure but there could also be a check valve at the inlet [bottom of heater tank] but have not heard of this one [if it exists] failing. Good luck--working on the back of the water heat is tough--limited space/reach.
PS--I have "poofed" one element but it was self-inflicted after intentionally draining the heater--kind of hard to do by ""accident--I would think.
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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