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Old 06-13-2017, 04:04 PM   #1
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1968 26' Overlander
Ghent , West Virginia
Join Date: Jun 2017
Posts: 5
Flange on black tank

I'm new to this I have a 1968 international land yacht it has a thetford valve on the black tank need the rubber gasket goes against the flange on the tank can't find it any where local camper stores telling me to take the flange out of the tank and replace with all new stuff I don't want to damage anything can the flange come out of the tank
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Old 06-13-2017, 04:27 PM   #2
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1967 17' Caravel
Oak Creek , Colorado
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If it's like my 67 was the valve is screwed (4 screws) to a mount that is molded in the tank.
The screws on mine were very rusted & I'm not sure they would come out without cracking something.
In the picture the 2 (of 4) rusty upper screws are what mount the valve to the tank. The two shiny ones mount the fitting to the valve. Good with your project. Click image for larger version

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Old 06-13-2017, 05:17 PM   #3
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1968 24' Tradewind
Oxford, , Mississippi
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I had to replace both the valve and tank on my 68.
Inland RV should have what you need.
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Old 06-13-2017, 07:19 PM   #4
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1968 26' Overlander
Ghent , West Virginia
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Thanks I thought that it maybe I'm think I may get a new gasket if I can and put it back on to my knowledge this tank has never been used
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Old 06-14-2017, 01:11 PM   #5
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1977 Argosy Minuet 6.0 Metre
1973 21' Globetrotter
1975 26' Argosy 26
Vista , California
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On my 72' the 4 screw flange looks like it is threaded into the black tank. You could then change everything to valterra type. Or a new thetford valve will come with a fresh gasket
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Old 06-14-2017, 02:55 PM   #6
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1968 20' Globetrotter
ANN ARBOR , THE GREAT LAKES
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If it's leaking...

Sometimes it's not the gasket, it's a tiny crack where the tank-flange mounts. Is your black tank polyethylene (Thetford) or is it ABS(unknown manufacturer)?? Cracks in polyethylene are best welded. Cracks in ABS are best epoxied.

Gaskets come with a new Thetford valve.

!968 was an early, somewhat experimental black tank era. For a 30 foot trailer, It would be reasonable to reconfigure the waste system with modern grey and black tanks using Valterra valves.

If time and $$ aren't easy right now, the link below has possibilities...

http://www.airforums.com/forums/f48/...re-159949.html
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