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Open Roads Forum  >  Tech Issues

 > leak at connection to drain pipes and Holding tank

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robrv3

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Posted: 07/10/22 09:17pm Link  |  Quote  |  Print  |  Notify Moderator

I have a small leak at the connection to drain pipes and the Holding tank that leaks when I drain a sink. What kind of connection is between the drain pipes and tank. I can unbolt the tank and drop it I think or are these pipes fastened to the tank. I have very limited access to where the drain pipes connect to the tank and not able to inspect that connection very well Any tips or ideas?

its a Chevy 2011 chassis Coachmen Freelander 21QB

Below is an image it's hard to reach and work with, I think I would have to cut the floor in the RV bathroom to work with this pipe

[image]
[image]

Mod Edit: Corrected image widths so as to not skew the forum window.

* This post was last edited 07/12/22 08:13am by an administrator/moderator *   View edit history

SJ-Chris

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Posted: 07/10/22 11:15pm Link  |  Quote  |  Print  |  Notify Moderator

Please let us know the year, make, and model of your RV and I'm sure someone will be able to give you some great/specific info.

I have a 2015 Thor Majestic 28a Class C RV. I had a leak recently on my black waste tank line (from the toilet to the waste tank where it connects). I also had to deal with the waste line from the bathroom sink to the black waste tank in the process. I posted a detailed description of the project with photos of every step. It shows the steps involving the sink line going into the black tank so maybe it will give you some ideas.

https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/30326133/gotomsg/30326133/p/1.cfm#30326133

In the above link, scroll down to post ~#10 for the detailed description with photos.

The key piece of info that would have saved me hours (and might save YOU hours) is that the job required removing the rear wheel well insert. That gave me complete access to all the pipes going to the black waste tank (....maybe YOUR RV will be the same).

Step #1: Clean out your black tank as best as you can before you start!

Let us know. Good luck!
Chris


San Jose, CA
Own two 2015 Thor Majestic 28a Class C RVs

robrv3

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Posted: 07/10/22 11:58pm Link  |  Quote  |  Print  |  Notify Moderator

It's a Chevy 2011 chassis Coachmen Freelander 21QB don't know if there is a plate somewhere in the vehicle with more information. There is a panel I can remove that gives me limited access. Your photos were helpful I can see I cant simply unbolt the tank and drop it it looks like my best bet at this point is to apply some sort of sealant around the pipe as it passes through plywood to the tank

* This post was last edited 07/11/22 12:54am by robrv3 *   View edit history

valhalla360

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Posted: 07/11/22 06:56am Link  |  Quote  |  Print  |  Notify Moderator

5th wheel not motorhome but on a previous RV, had a similar leak. It was the tank cracked around the fitting, which was glued into place with no real option for replacement. There was a special glue (need to match the correct plastic) which basically melted it back together.


Tammy & Mike
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2021 Gray Wolf
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Full Time spliting time between boat and RV


Mayor30

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Posted: 07/11/22 09:45am Link  |  Quote  |  Print  |  Notify Moderator

Years ago,I broke off the dump valve when it caught on a tree stump.It also cracked the connection where the drain line came out of the tank. I used JB Weld apoxy. I cleaned off the crack in the tank and mixed and applied the JB weld per the instructions. It lasted for the over 2 years and then I sold the trailer.I have used JB Weld on different things both plastic and metal and it always worked for me.

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