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08-20-2020, 03:48 PM
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#1
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Member
Join Date: Jul 2018
Location: Michigan
Posts: 41
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Gray Tank Input Pipe Broken Off at Tank
We just cut short our first trip this year because we had gray water leaking out the underbelly. After we got home, I got underneath and found the shower/bathroom sink drain pipe connection to the gray water tank cracked completely free, even with the top of the gray tank.
The input pipe is a 2" ABS black plastic pipe that is inserted into a receptacle on the tank that appears to be a glued on. Does anyone know how to either, a) remove the broken off stub of pipe in the gray tank or, b) how to insert and secure a new drain pipe through the existing broken off pipe?
TIA
Jim
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2019 Winnebago Minnie 2250DS
Taj Ma Haul
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08-20-2020, 03:55 PM
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#2
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Senior Member
Join Date: Jan 2015
Location: Prescott, Arizona
Posts: 3,564
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Will a rubber coupling work?
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'04 Newmar MADP, 1100w of solar, Rubicon toad
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08-21-2020, 04:50 AM
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#3
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Member
Join Date: Jul 2018
Location: Michigan
Posts: 41
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Quote:
Originally Posted by ByeTheWay
Will a rubber coupling work?
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Unfortunately, no. There is nothing to attach to above the gray tank. The input pipe broke off flush with the surface.
__________________
2019 Winnebago Minnie 2250DS
Taj Ma Haul
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08-21-2020, 09:54 AM
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#4
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Senior Member
Join Date: Jan 2015
Location: Prescott, Arizona
Posts: 3,564
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1 1/2" ABS will fit inside 2" ABS, leaving a small gap which could be filled with Plumbers Putty: https://www.amazon.com/WM-Harvey-043...s%2C269&sr=8-3
This may work permanently or until you get a better fix.
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'04 Newmar MADP, 1100w of solar, Rubicon toad
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08-21-2020, 03:50 PM
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#5
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Senior Member
Tiffin Owners Club
Join Date: Aug 2016
Location: Bastrop Texas
Posts: 1,343
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This is gonna be long winded. First what caused it to brake. no need doing anything until you understand that. If the cause can be determined and eliminated then ABS Plastic can be welded back together with heat or chemically done. You will need to have room to work all the way around the broken part. There are several good sites on UTube that show various ways to make the repair. here one site: https://www.youtube.com/watch?
If you just google "how to weld ABS plastic" you will turn up more that you have time to read.
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2000 Allegro Bus 35R 3126 Cat 300 Allison 3060MD 6 speed
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08-22-2020, 05:44 AM
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#6
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Member
Join Date: Jul 2018
Location: Michigan
Posts: 41
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Well I've implemented a fix by inserting a "splint" piece of PVC into the broken ABS stub left in the gray tank. I actually had to sand off the threads of a PVC adapter fitting to get a tight fit, but there is now about an inch of solid PVC secured in place by 3M 5200. It appears to be a real solid connection and for those who know, 3M 5200 is serious stuff.
I then made a replacement pipe of PVC from the fitting back to where I had sawed off the ABS. Suspecting that it may have been vibration or slight shifting of the gray tank that broke the connection in the first place, I used a 4" rubber pipe coupler to join the new PVC to the sawed off ABS. That removed the issue of gluing PVC to ABS and added protection against vibration and slight shifting.
I'm putting the underbelly cover back in place this morning and we'll see how it goes. Thus far, the factory recommendation was to replace the gray tank, but they may have believed the tank itself was damaged when they said that.
Thanks again to all who contributed.
__________________
2019 Winnebago Minnie 2250DS
Taj Ma Haul
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08-22-2020, 12:06 PM
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#7
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Senior Member
Join Date: Jun 2016
Location: SW Louisiana
Posts: 8,849
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I have read about people having this sort of issue professionally repaired by "spin welding" a new fitting into the tank. I have no idea what sort of place would do this work though.
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2002 Safari Trek 2830 on P32 Chassis with 8.1L w/ 400 watts solar 420Ah LiFePo4
2017 Jeep Cherokee Overland & 2007 Toyota Yaris TOADs with Even Brake,
Demco Commander tow bar and Blue Ox / Roadmaster base plates
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08-22-2020, 12:33 PM
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#8
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Senior Member
Join Date: Jan 2020
Posts: 285
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Any professional plumber will have a set of specialty bits to bore the broken stub out. After it’s bored, the 2” pipe will glue right back in.
When you put it back add a rubber collar in the section somewhere. This with allow some vibration and prevent another break.
EDIT: Lowe’s has the bit/cutter. They are $14. Eastman fitting saver.
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08-23-2020, 08:29 AM
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#9
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Member
Join Date: Jul 2018
Location: Michigan
Posts: 41
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Quote:
Originally Posted by TMyers17
Any professional plumber will have a set of specialty bits to bore the broken stub out. After it’s bored, the 2” pipe will glue right back in.
When you put it back add a rubber collar in the section somewhere. This with allow some vibration and prevent another break.
EDIT: Lowe’s has the bit/cutter. They are $14. Eastman fitting saver.
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Thanks for pointing me to the bit at Lowes. I had glanced around for one at HD, but didn't see it.
I've now tested my "fix" and it appears quite solid. But if I ever do need to replace/repair it, the fitting saver will probably be the only option left short of replacing the entire tank...and I don't even want to think of how much that would cost.
__________________
2019 Winnebago Minnie 2250DS
Taj Ma Haul
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