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12-04-2019, 03:38 PM
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#1
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New Member
Join Date: Jul 2018
Location: Wheatland
Posts: 9
M.O.C. #22318
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Plumbing issue
Help!! Our black tank power washer creates a leak in a hot water line and a cold water line but will not pressure wash the black water tank. Our rig is a 2007 Montana fiver 2955RL. We bought it about 1 1/2 yrs ago and are still learning all the ins and outs. Any one had to deal with this sort of problem?? Any help is much appreciated😊 I guess our problem is that we can’t determine where the leaking water line goes or where it’s from. We tried all faucets within the rig but see no leak. Only when the power sprayer is turned on. Hope that makes more sense😬
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12-04-2019, 04:09 PM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Very common problem. If you are lucky, under your bathroom sink a waterline will come up from the basement connect to a black (usually) device and then the line goes back to the basement. That is a vacuum breaker and needs to be replaced. If your not lucky it's in the wall somewhere and there are a number of walls it could be behind. When you find it, either illuminate it altogether and use and exterior one (what we do) or replace it with a good brass one from the hardware store.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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12-04-2019, 07:31 PM
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#3
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New Member
Join Date: Jul 2018
Location: Wheatland
Posts: 9
M.O.C. #22318
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We apparently don't have one under our bathroom sink so we'll have to try plan B. However, I'm not sure what you meant by using a exterior one. Also, you said illuminate it, did you mean eliminate it? Your second solution has me confused, which isn't hard to do😏 Thanks for your help my friend.
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12-04-2019, 07:57 PM
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#4
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Montana Fan
Join Date: Jan 2018
Location: Box Elder
Posts: 247
M.O.C. #21057
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I was one of the lucky ones. It was under the bathroom sink, Cut the lines and used 2 shark bite 90s to eliminate it,
__________________
2018 Montana High Country 331RL
2006 Ram 2500 SRW 4X4 Laramie Quad Cab 5 .9
Andersen Ultimate 20K Hitch Lippert Solid Steps Steady Fast stabilizes
Rex and Patsy
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12-04-2019, 08:01 PM
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#5
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Yes spell check got me. We use a backflow preventer like restaurants and others have to put on an outside or mop sink faucet available at most hardware stores and I have it attached to the flush inlet in the convenience center. On some older models there was a patch on the wall of a bedroom cabinet next to the bathroom that had the vacuum breaker in there. I saw one older model with the bathroom of the side isle that had the hatch in a closet or pantry, I don't remember which, down stairs on the wall of the bathroom. Several members that had those set ups found that the patch didn't always hit the breaker and had to open the hole further to get to it. Good luck on your search.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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12-04-2019, 08:57 PM
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#6
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,356
M.O.C. #4831
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If your 2007 is anything like my 2005, and I bet it is, the vacuum breaker is behind the shower. You can access it from the left hand kitchen closet. There should be a removable panel there. If not you will have to make a hole yourself. Be sure to close the sliding door as it will block your view.
The easier way is to remove the back wall of the passthru compartment, find the lines that feed the vacuum breaker, cut each one and connect them together (using a couple of 90 degree Shark Bite connectors). This will eliminate the vacuum breaker, and the leak behind the shower. You do need to put an anti-siphon valve on the convenience center connection to provide the same back flow protection
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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12-05-2019, 05:25 AM
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#7
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Montana Fan
Join Date: Sep 2019
Location: Sioux Falls
Posts: 120
M.O.C. #24981
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I have a 2019 373RD and I do have the two white water lines coming up under the bathroom vanity with the black piece which I assume would act the same as a back flow preventer. I have had two occasions where it did leak, both times I believe was because of too high of water pressure when I was rinsing the tank. My questions are, why do the lines go up into the bathroom and then back down to the tank? If I have access to the pipes underneath can I shorten the pipes to connect them down there? If I decide to eliminate the black piece and use a back flow preventer at the water inlet what are the connectors I use to connect the two white lines together? Thanks I look forward to input.
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12-05-2019, 05:37 AM
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#8
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Montana Fan
Join Date: Oct 2017
Location: Fulton
Posts: 456
M.O.C. #20688
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Just use a shark bite coupling for 1/2” Pex
__________________
Wayne & Malinda
2018 Montana 3731FL
MORryde IS/DiscBrakes
2017 F450 DRW KR 4x4
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12-05-2019, 01:32 PM
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#9
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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Quote:
Originally Posted by Sdexte
I have a 2019 373RD and I do have the two white water lines coming up under the bathroom vanity with the black piece which I assume would act the same as a back flow preventer. I have had two occasions where it did leak, both times I believe was because of too high of water pressure when I was rinsing the tank. My questions are, why do the lines go up into the bathroom and then back down to the tank? If I have access to the pipes underneath can I shorten the pipes to connect them down there? If I decide to eliminate the black piece and use a back flow preventer at the water inlet what are the connectors I use to connect the two white lines together? Thanks I look forward to input.
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I believe the answer is so that it is higher than the toilet bowl
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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12-05-2019, 07:24 PM
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#10
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,690
M.O.C. #12947
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Quote:
Originally Posted by Sdexte
I have a 2019 373RD and I do have the two white water lines coming up under the bathroom vanity with the black piece which I assume would act the same as a back flow preventer. I have had two occasions where it did leak, both times I believe was because of too high of water pressure when I was rinsing the tank. My questions are, why do the lines go up into the bathroom and then back down to the tank? If I have access to the pipes underneath can I shorten the pipes to connect them down there? If I decide to eliminate the black piece and use a back flow preventer at the water inlet what are the connectors I use to connect the two white lines together? Thanks I look forward to input.
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This is the link to the manufacturer's site that has the product details for the valve: https://jrproducts.net/product/571-vac-chk-a/
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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12-06-2019, 07:07 AM
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#11
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Montana Fan
Join Date: Sep 2019
Location: Sioux Falls
Posts: 120
M.O.C. #24981
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Quote:
Originally Posted by Carl n Susan
If your 2007 is anything like my 2005, and I bet it is, the vacuum breaker is behind the shower. You can access it from the left hand kitchen closet. There should be a removable panel there. If not you will have to make a hole yourself. Be sure to close the sliding door as it will block your view.
The easier way is to remove the back wall of the passthru compartment, find the lines that feed the vacuum breaker, cut each one and connect them together (using a couple of 90 degree Shark Bite connectors). This will eliminate the vacuum breaker, and the leak behind the shower. You do need to put an anti-siphon valve on the convenience center connection to provide the same back flow protection
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So just so I have this right... if I have access to the water lines behind the pass through I can cut and splice (using the shark bites) there as long as I have the back flow preventer at the flush connection. It would help if I could see a picture of the two lines connected together.
Thanks
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12-06-2019, 10:27 AM
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#12
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,707
M.O.C. #7992
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Sharkbites are excellent items but very expensive. Get you a couple of plastic compression fittings and join them that way. Explain what you are doing to most plumbing sales personnel, yes even Lowes or Home Depot, and they can fix you up for four or five bucks.
__________________
2006 3000RK
2009 Ram 2500
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12-06-2019, 11:03 AM
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#13
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,945
M.O.C. #5651
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I would think if you get behind the basement wall and have someone turn on the backflush for 10 seconds, you could figure out which lines are leaking. As to a picture, in my rigs, it was just two lines about 3 inches apart. They go up to the valve, which is about 3 or 4 inches long, cross over thru the valve and back down.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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12-06-2019, 11:07 AM
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#14
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Montana Fan
Join Date: Sep 2019
Location: Sioux Falls
Posts: 120
M.O.C. #24981
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Ok so I have all the parts I need, I just need to know if I can connect the two lines together in the basement or if I have to keep the lines high up in the bathroom. I am going to use an anti siphon/ back flow preventer at the tank flush inlet.
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12-06-2019, 12:03 PM
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#15
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,707
M.O.C. #7992
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Hook them together in the basement. No need to keep them high as you are using back flow preventer at the source.
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2006 3000RK
2009 Ram 2500
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12-06-2019, 12:04 PM
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#16
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Established Member
Join Date: May 2019
Location: Williamstown, NJ
Posts: 15
M.O.C. #24028
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Thanks for posting this question and answers. Another gadget that I had no clue that we have. Looked under the bathroom sink and there it was. Thanks
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Wayne & Patti Bumm / 2019 Montana 3121 RL / 2001 F250, 7.3 Diesel, 8' Bed, Stable Loads, Extra Leaf ea. side, Rancho Shocks
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12-06-2019, 12:08 PM
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#17
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Montana Fan
Join Date: Sep 2019
Location: Sioux Falls
Posts: 120
M.O.C. #24981
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Great thanks for the quick response
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12-11-2019, 04:22 PM
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#18
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Established Member
Join Date: Apr 2015
Location: Idaho Falls
Posts: 22
M.O.C. #17294
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I had two hoses connected with a Siamese connection at the inlet, did not turn off regular water supply hose when turning on black tank flush, water started leaking from shower, turned off regular hose, problem solved
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12-11-2019, 09:36 PM
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#19
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Established Member
Join Date: Jan 2012
Location: Huntsville
Posts: 18
M.O.C. #12110
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Please remember to winterize that line also.
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12-12-2019, 08:08 AM
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#20
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Established Member
Join Date: Aug 2019
Location: Riverdale
Posts: 26
M.O.C. #24632
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Us too
We bought a used ‘09 Big Sky. The one and only time we tried to use the BW tank cleaner, water shot from behind the shower wall onto the stairs.
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