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Topic: Black tank dump piping fell off tank (Read 1366 times) previous topic - next topic
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Re: Black tank dump piping fell off tank
Reply #25 –
Quote from: Syzygy  - 
We own a 2015 27MB.  Today the black tank dump piping fell off the tank.   Nothing seems to be broken and it seem I should be able to clean it all up and reattach the piping to the tank.   There were two hose clamps on the connection, but I don't see any evidence of any sealant/caulking/glue.  Is there an appropriate/necessary product to cover the mateing surfaces?

Also there was no support structure for this pipe run and the dump valve at the end.  Has anyone added pipe supports?  If so any advice on what might work?

Thanks
Geoff

Mine fell off who knows where. Put the new one on without sealant. Just a hose clamp and there are no leaks at all. I check it often and used large zip ties to "catch it" if it falls off again. Remember that the valve clamps over the tank outlet, rather than in the outlet.
LD 22', 1989 Custom Build. Chassis 1990 Chevy Van G30, 5.7l.
Re: Black tank dump piping fell off tank
Reply #26 –
I noticed same problem on my '17 mb. Had been attached to the fiberglass panel but that did not hold. I added 2 narrow aluminum strips - one on each side of the fiberglass for strength and then reattached the end of the black pipe. Fix done in June, 2018, with 12,000 miles. Now almost 28,000 miles with no problems.
2016 MB
Re: Black tank dump piping fell off tank
Reply #27 –
Quote from: philjlaw  - 
....... I added 2 narrow aluminum strips - one on each side of the fiberglass for strength and then reattached the end of the black pipe. Fix done in June, 2018, with 12,000 miles. Now almost 28,000 miles with no problems.

The one downside as I see it to this 'repair' is that if you  ever hit something it will take out both you black tank piping and you fiberglass.   Just something to keep in mind ......  I had a Ford Dealership take out my black tank pipe during a oil change.

glen
personal fine art photo stuff
TF Mack | Flickr
It's all good .......
2014 Twin King
Re: Black tank dump piping fell off tank
Reply #28 –
How high off the ground (or the distance between the ground and the pipe) is black tank dump piping? Do some models/years have different measurements?
Sam
Re: Black tank dump piping fell off tank
Reply #29 –
Different years and different models have varying tank sizes, piping, and dump termination valve configurations and locations. Also, these elements may vary among years of the same model, e.g., the dump termination valves of the black and grey tanks on earlier TKs are separate; model years after 2016 (?) have a single termination valve for both the black and grey tanks. This piping and valve configuration is low-hanging and appears vulnerable to being snagged and ripped off; owners of late-model TKs might comment whether this has been a problem.

YMMV.
2003 TK has a new home
Re: Black tank dump piping fell off tank
Reply #30 –
Quote from: Wingersky  - 
How high off the ground (or the distance between the ground and the pipe) is black tank dump piping? Do some models/years have different measurements?

What Joan said.  In my case, there is about 8" of clearance for the black valve.  The grey is less at 7" and is probably more vulnerable due to it's location rearward of the back tires. That reminds me, still need to order a spare Valterra valve!
Greg & Victoria
2017 Mid-Bath  “Nocona” towing a manual 2015 Forester
Previously a 1985 TK
SKP #61264
Re: Black tank dump piping fell off tank
Reply #31 –
Quote from: Joan  - 
Corollary to supporting the dump lines: check the tightness of the mounting bolts for the black and grey tanks.  ;)

Did this today and it’s now on my annual maintenance list (thanks for the tip!).  For those that want to do this, for both tanks, you will need a 9/16” wrench, and 9/16” deep socket, although YMMV.  I used a 5/16” nut driver to check the hose clamps.
Greg & Victoria
2017 Mid-Bath  “Nocona” towing a manual 2015 Forester
Previously a 1985 TK
SKP #61264
 
Re: Black tank dump piping fell off tank
Reply #32 –
Quote from: philjlaw  - 
I noticed same problem on my '17 mb. Had been attached to the fiberglass panel but that did not hold. I added 2 narrow aluminum strips - one on each side of the fiberglass for strength and then reattached the end of the black pipe. Fix done in June, 2018, with 12,000 miles. Now almost 28,000 miles with no problems.

I like this idea and may adopt it in the future, or at least add a second mounting bracket but, for now, just upgraded the hardware to SS.
Greg & Victoria
2017 Mid-Bath  “Nocona” towing a manual 2015 Forester
Previously a 1985 TK
SKP #61264