Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-06-2011, 12:31 PM   #1
2 Rivet Member
 
1986 25' Sovereign
Allegan , Michigan
Join Date: Oct 2005
Posts: 85
Holding tank flange - caulk?

After 26 years, the Thetford valves on my holding tanks have started to leak. I removed the sheetmetal pan and discoved that the screws holing the valve to the tank flange were very rusted and - as a result - had split the flange where they threaded in. I have new parts (including stainless screws and brass inserts) and will be putting it back together shortly - I hope! My question is what sort of sealant/caulk to use to seal the tank/flange connection? It appears that the factory used a white substance that remained slightly flexible. It worked well. My first thought was some sort of marine sealant for underwater through hull fittings.

Any suggestions would be appreciated. I'll try and attach a photo showing the problem and the remaining caluk/sealant.

Thanks Whit Nash
Attached Thumbnails
Click image for larger version

Name:	Flange1.jpg
Views:	91
Size:	215.4 KB
ID:	129187  
__________________

__________________
rwnash is offline   Reply With Quote
Old 05-06-2011, 01:41 PM   #2
Mini Rivet
 
bmklawt's Avatar
 
1975 25' Tradewind
Holland , Michigan
Join Date: Sep 2008
Posts: 235
I was told to use Vulkem 116, which I did use 2 years ago and it is still holding fine, in fact it is still soft.
If you can't find any let me know, I have a few tubes left.
__________________

__________________
Bruce,
Parts needed: Fan for roof vent or whole vent fan assembly, vented catalytic heater.
My blog for the 1975 Tradewind restoration, Has not been updated in a while but I am still working on it.
bmklawt is offline   Reply With Quote
Old 05-09-2011, 09:36 AM   #3
2 Rivet Member
 
1986 25' Sovereign
Allegan , Michigan
Join Date: Oct 2005
Posts: 85
Bruce,

Thanks for the information, I actually ordered some when I got the new flanges from Inland. (Would have responded earlier but was busy this weekend: grandson's soccer game in Benton Harbor and Mother's Day in Albion at stepson's.)

Starting to get it back together. Brief setback when the gray tank fell out on the ground! It looks like they drop the tanks through the frame into the sheetmetal pan - and THEN put down the chipboard floor. The only things holing the tank in were the two hose clamps on the inlet pipes. I'm building some supports to hold the tanks up so I can get the exit plumbing installed and then finally the support pan.

I don't think they dsesigned it so you could easily replace the valves or change the seals - oh well, I should be able to get it done shortly.

Hope that you are having fun with the old trailer - I notice the extra weight in the new one.

Thanks again,

Whit Nash
__________________
rwnash is offline   Reply With Quote
Old 05-18-2011, 08:35 PM   #4
Mini Rivet
 
bmklawt's Avatar
 
1975 25' Tradewind
Holland , Michigan
Join Date: Sep 2008
Posts: 235
Whit,

I didn't notice it was you I was responding to until today when I reread your post.
We are having a ball with the camper, the kids can't get enough of camping. They are trying to talk mom and dad into going to Maine for the summer.

I am currently trying to get new cushions and get them reupholster but foam is not cheap.
__________________
Bruce,
Parts needed: Fan for roof vent or whole vent fan assembly, vented catalytic heater.
My blog for the 1975 Tradewind restoration, Has not been updated in a while but I am still working on it.
bmklawt is offline   Reply With Quote
Old 05-23-2011, 01:56 PM   #5
2 Rivet Member
 
1986 25' Sovereign
Allegan , Michigan
Join Date: Oct 2005
Posts: 85
Repair report

Bruce,

As you suggested the Vulkem worked, out for a week and no leaks! The only thing that I'd do different is to modify the pan that holds the tanks up; I'd cut out the part by the valves and tank fittings and make it a separate access panel. That way I could have reinstalled the gray tank and then installed the fiffings and valves with the tanks in place, (As it was, I had to "guess" how things were going to line up while installing the new valves.

I am a little surprised that the factory did not plan for a straightforward valve/seal replacement - but in their defense it did last about a quarter century. Hope I don't have to spend more time under her for a while!

Maine this summer? Sharon and I are heading to WoodenBoat school (Brooklin ME) in late August. Looking forward to it but being off the grid for two weeks is prompting me to check into two 6 volt deep cycle batteries and solar recharger.

Thanks again,

Whit Nash
__________________
rwnash is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Adding a larger grey tank to a 78 Tradewind johnhh Waste Systems, Tanks & Totes 3 04-04-2011 01:43 PM
mounting toilet flange on black tank 386kustoms Sinks, Showers & Toilets 3 03-04-2011 08:52 AM
'69 Globetrotter, Black tank for streetside bath dieselpup Waste Systems, Tanks & Totes 9 03-03-2011 07:50 AM
New Slant on Tank Sensor Cleaning... Mexray Waste Systems, Tanks & Totes 5 01-30-2011 02:07 PM
Extra 67 tradewind blackwater tank, gray water tank poezlaw Waste Systems, Tanks & Totes 0 01-17-2011 10:19 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:27 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.