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09-23-2019, 04:53 PM
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#1
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Junior Member
Winnebago Owners Club
Join Date: Sep 2019
Location: SoCal
Posts: 23
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Shower backs up before grey tank is full
The shower water starts to backup in the pan when the tank level shows 1/3 or 2/3 full. The coach is perfectly level and this has occurred several times. Additional water can be added to the tank via the kitchen or bath sinks. My coach model is a 2019 Adventurer 27N. The tank level is hard to see because of the grey color but the one occasion that I was able to check it when this occurred, it looked around 2/3 to 3/4 full.
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09-23-2019, 04:59 PM
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#2
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Senior Member
Join Date: Nov 2015
Posts: 26,810
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Are you sure that the shower goes to grey and not black tank?
Some MFGs do plumb them that way......
How full was black tank when shower backed up?
Unfortunately your Winnebago is a new model and no plumbing diagrams are available.
the other 2019 Adventurer models are just not for your 27N
So contact Winnebago and inquire......
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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09-23-2019, 05:22 PM
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#3
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Senior Member
Join Date: Apr 2018
Posts: 672
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Draino
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09-23-2019, 05:26 PM
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#4
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Senior Member
Join Date: Nov 2015
Posts: 26,810
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Quote:
Originally Posted by Dom
Draino
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I think that Winnebago uses a 'waterless trap' on showers so Draino is NOT the answer.
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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09-23-2019, 05:29 PM
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#5
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Member
Join Date: Jul 2017
Location: Folsom, California
Posts: 50
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Quote:
Originally Posted by oakprk
The coach is perfectly level...
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Try it with the shower a bit more "up hill" from the tank and see what happens. Then again, the drain pipe may be routed away from the tank before it goes toward the tank.
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09-23-2019, 06:52 PM
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#6
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Registered User
Join Date: Dec 2017
Posts: 323
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Quote:
Originally Posted by Old-Biscuit
Unfortunately your Winnebago is a new model and no plumbing diagrams are available.
the other 2019 Adventurer models are just not for your 27N
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Before it was an Adventurer 27N it was a Vista LX 27N, and before that it was just a Vista 27N. The plumbing and electrical haven't changed.
https://www.winnebagoind.com/diagram/2018/000179499.pdf
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09-23-2019, 07:13 PM
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#7
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Senior Member
Join Date: Nov 2015
Posts: 26,810
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Quote:
Originally Posted by WyCamper
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That plumbing diagram shows 4 cutouts on top of grey tank
Vent to roof
Shower drain
Bathroom sink drain
Galley sink drain
ALL of them are single/separate lines
Shower has a 'waterless trap' which shouldn't allow for backflow
But it could beclogging from hair etc and not allowing water to completely drain
Should be an access to remove the trap and clean it.
Only 2 cutouts on black
Toilet and Vent Line
Then again.......level indicators are notoriously inaccurate
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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09-24-2019, 08:35 AM
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#8
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Senior Member
Winnebago Owners Club
Join Date: Dec 2016
Posts: 172
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Quote:
Originally Posted by oakprk
The shower water starts to backup in the pan when the tank level shows 1/3 or 2/3 full. The coach is perfectly level and this has occurred several times. Additional water can be added to the tank via the kitchen or bath sinks. My coach model is a 2019 Adventurer 27N. The tank level is hard to see because of the grey color but the one occasion that I was able to check it when this occurred, it looked around 2/3 to 3/4 full.
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We have had the same. I suspect too many suds in the tank actually slows the flow. That statement may not make sense to some but seems to be the case. Also pull the drain cover you might have a partial blockage there.
Does the shower pan drain down slowly.....ours does as the gray water level increases.
Also the water level lights are not accurate at all. They can show very different levels as ambient temps change.
__________________
Martin & Michelle and our dog Blue, Paradise, CA.
2016 Winnebago Vista LX 27N, Sumo Springs, Safe T Plus, SS rear track bar, Dish
2017 Equinox Premier AWD V6, Blue OX base and bar, SMI Stay and Play Duo
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09-24-2019, 08:53 AM
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#9
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,758
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Hi ! Welcome to IRV2! We're sure glad you joined the gang! 
I'm not a Winnie guy so can't help with that. Noticed you are new on IRV2 and wanted to say hello!
Good luck, happy trails, and God bless!  
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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09-24-2019, 09:47 AM
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#10
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Senior Member
Join Date: Jan 2018
Posts: 3,009
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Sure sounds like hair clogging the drain. Used to happen to us. Pulled the drain cover and removed beaucoup hair.
Solved the problem with wire mesh screen from Walmart. A 3 pack of screens was less than 4 bucks. The small one fits the bathroom sink. The mid-sized one fits the shower drain and the large one fits the kitchen sink.
All 3 are doing a great job for us.
https://www.walmart.com/ip/Peerless-...t-3pc/17043463
__________________
2005 Monaco Knight 40PLQ; Cummins 8.3L ISC330, Pacbrake, Allison 3000, Roadmaster RR8R, ScanGauge D, 2004 Kawasaki Vulcan VN750(Geezer Glide) on a Versahaul carrier pulling a 2013 Kia Soul+; 2.0L, 6 speed Sport shifter(great car) on an American Car Dolly(great dolly.)
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09-25-2019, 10:48 AM
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#11
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Senior Member
Winnebago Owners Club
Join Date: Aug 2012
Posts: 465
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Sure sounds like some sort of pluggage. Being a new coach maybe there's some construction debris in the trap or drain line. Try calling Winnebago Tech Services at 800.537-1885 to see if it's a common issue.
Skip Y
2010 Journey
Loc: Mich
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09-25-2019, 11:45 AM
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#12
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Junior Member
Winnebago Owners Club
Join Date: Sep 2019
Location: SoCal
Posts: 23
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The shower does drain to the grey tank, not the black. Although Winnebago doesn't have documentation on-line for the 2019 Adventurer 27N, the model has been around for a while as a Vista and Vista LX.
The shower drains fine when the tank is empty it starts slowing down and backing up when the gauge reads 2/3 full. The coach is only six months old and hasn't had the time to build up any hair clogs anyway.
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09-25-2019, 11:58 AM
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#13
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Junior Member
Winnebago Owners Club
Join Date: Sep 2019
Location: SoCal
Posts: 23
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Quote:
Originally Posted by Park Super
We have had the same. I suspect too many suds in the tank actually slows the flow. That statement may not make sense to some but seems to be the case. Also pull the drain cover you might have a partial blockage there.
Does the shower pan drain down slowly.....ours does as the gray water level increases.
Also the water level lights are not accurate at all. They can show very different levels as ambient temps change.
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It starts draining slowly then pretty much stops draining. I thought part of the problem was the placement of the tank sensors. They are very close to the top of the tank on the right side so a slight tilt to the left might not allow a full indication when the shower backs up. I saw a 2016 Vista 27N on a recent camping trip and was able to see their sensors and they appeared to be exactly the same. The grey tank is unusual in that the bottom is tapered up towards the right side and supported by foam so there's a considerable amount of space towards the left side. The sensor positions just don't appear to be appropriate.
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09-25-2019, 11:59 AM
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#14
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Senior Member
Winnebago Owners Club
Join Date: May 2019
Posts: 299
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Quote:
Originally Posted by oakprk
The shower does drain to the grey tank, not the black. Although Winnebago doesn't have documentation on-line for the 2019 Adventurer 27N, the model has been around for a while as a Vista and Vista LX.
The shower drains fine when the tank is empty it starts slowing down and backing up when the gauge reads 2/3 full. The coach is only six months old and hasn't had the time to build up any hair clogs anyway.
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That's sounding more like the tank vent itself. The more water in the tank the more gravity pressure required to pass through the waterless trap.
__________________
2019 Winnebago Forza 36G
2018 Jeep Wrangler Sahara
Anchorage Alaska when not on the road
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