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Old 11-01-2017, 05:43 PM   #21
CORattler
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I just looked up the floor plan for a 3730fl. The bath is towards the rear. Is there a dump valve that you are missing ? (not pulling) towards the rear around the wheels somewhere. I am guessing the tank is full.
It does look like that is the case. If the water rises in the shower as you put water down the sink drain that means water is backing up INTO the shower without you adding water to the shower. Again, look for an additional grey water dump valve on or near the frame in back of the rear wheel on either side.
Keep us advised with your fix. We'll help you through this.
 
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Old 11-01-2017, 06:13 PM   #22
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Please Keep us posted. I have read before of people finding a plastic disc that was drilled out of the tank for a drain/vent line falling into the tank and blocking the drain line path.
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Old 11-01-2017, 09:51 PM   #23
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Hay Carl not to start anything but I find it funny that all Montana's come with Hepov valves I have a friend that just picked up his 2018 3160RL and it has regular pee traps under the sinks so I don't know I put Hepov valves in my 352RL HC and in my last two
5er's .
I was referring to the shower drain, not sinks (bedroom or kitchen). And it may have changed on some of the new creative floor plans depending on underfloor space issues.
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Old 11-02-2017, 03:48 AM   #24
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I was referring to the shower drain, not sinks (bedroom or kitchen). And it may have changed on some of the new creative floor plans depending on underfloor space issues.
Picked up our 2018 3791RD 2 days ago and they are still putting them on the showers and regular P traps on sinks.
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Old 11-02-2017, 08:38 AM   #25
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Just a thought. why do they use the hepa thing rather than a reliable p-trap, sometimes simpler is better?
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Old 11-02-2017, 06:13 PM   #26
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That is a great ? I often have asked myself. Why change something that has worked forever. Some bean counter thought it was a good idea. If I have any trouble with mine, it will be coming out and replaced with the old school p-trap for sure.
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Old 11-02-2017, 07:02 PM   #27
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Please Keep us posted. I have read before of people finding a plastic disc that was drilled out of the tank for a drain/vent line falling into the tank and blocking the drain line path.
I can verify that this does occur as I saw this for myself on a past RV I owned.
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Old 11-02-2017, 07:04 PM   #28
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That is a great ? I often have asked myself. Why change something that has worked forever. Some bean counter thought it was a good idea. If I have any trouble with mine, it will be coming out and replaced with the old school p-trap for sure.
Is it possible that it's a space consideration (close quarters/tight fit) issue?
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Old 11-02-2017, 07:06 PM   #29
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Maxwell, Any update on your issue?
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Old 11-03-2017, 06:40 AM   #30
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My bet is when you expose your valve you will find the set screw securing the pull cable to the valve is loose.
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Old 11-03-2017, 05:02 PM   #31
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Glad to hear you got ahold of Keystone and they are sending a mobile tech out to diagnose your problem. Be sure to let us know what the tech finds.
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Old 11-06-2017, 02:06 PM   #32
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Problem was that the Grey and Black tank labels were backasswards. THe grey tank was in fact full but it was labeled as the black tank which I did not mess with. A few days ago I was flushing the “black tank” and was wondering why the return looked so clean - I just figured I was a real clean guy. Who would a thought that the tanks were mislabeled. Wow - working fine now - although I think I may have damaged the HEPA valve which is what I think I had in the shower drain. I guess I can live without that - seems to be p-traps under sink and under RV main drain so not sure it is needed anyway. I appreciate everyone’s help and concern.
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Old 11-06-2017, 05:29 PM   #33
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my '17 305RL had the two labels crossed - dealer caught it when it was in for fridge service.

I think HEPA valve keeps smells in tank ... replace, I would or p-trap it
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Old 11-06-2017, 08:13 PM   #34
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Max- I would do as Ram Montana High Country stated and replace that HEPA valve. It can be accessed, I think, by taking out the basement storage wall and getting under the shower area and taking the damaged one out and replacing it with another or a "p" trap. The gray tank will not give off the bad odors that the black tank but it will still give you sewer gasses when you dump the gray. Better safe than sorry, the way I look at it!

Glad you found the problem and now you know how to fix it if it should happen again on another drain.
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Old 11-07-2017, 08:12 AM   #35
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Shower not draining all of a sudden

Quote:
Originally Posted by Rondo View Post
Max- I would do as Ram Montana High Country stated and replace that HEPA valve. It can be accessed, I think, by taking out the basement storage wall and getting under the shower area and taking the damaged one out and replacing it with another or a "p" trap. The gray tank will not give off the bad odors that the black tank but it will still give you sewer gasses when you dump the gray. Better safe than sorry, the way I look at it!

Glad you found the problem and now you know how to fix it if it should happen again on another drain.
Me too - I should have been suspicious seeing that the black colored valve handle was labeled as Grey - but I'm a little slow. My Monty is a FL - so the shower is in the back. I am afraid that access is going to through the belly - if in fact there was a HepaVo trap there - I still am not sure.
Thanks for your help
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Old 11-07-2017, 07:24 PM   #36
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You have a HepVo valve instead of a P trap. A search on HepVo will provide lots of info. Here is one that jumped out at me
http://www.montanaowners.com/forums/...ad.php?t=70434
Click image for larger version

Name:	B4123CF9-96F1-487D-BA32-6A5F797897BF.jpg
Views:	33
Size:	134.8 KB
ID:	796 Does this look like a part of the HepaVo? It doesnt look like a porous membrane - looks more like rubber tubing - this was in the drain of the shower also - still more there. I’d appreciate your input.
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Old 11-08-2017, 04:32 PM   #37
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If that's a part of the new fangled hapa trap, I want no parts of it. I would be replacing it the tried and true p/trap.
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Old 11-08-2017, 04:56 PM   #38
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If that's a part of the new fangled hapa trap, I want no parts of it. I would be replacing it the tried and true p/trap.
Man, I don’t know. It doesn’t resemble any part of what little I saw of one in a video. Hopefully someone can tell me WTH this is ! I don’t know what else it could be though.
Thanks
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Old 11-09-2017, 05:42 AM   #39
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Looks like it could be part of the Hepa valve. I think the reason they use it is because it prevents water from the tank from sloshing back into the shower if you are moving with a nearly full tank, something a p-trap wouldn't do. Not an issue with the sinks because they are physically higher.
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Old 11-09-2017, 06:26 AM   #40
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Only one other thing to ask first. Did you follow others advice and add a twist on gate valve to the end of your sewer connection? I've gotten to a campground and forgot to open that before.

Me Too!
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