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06-30-2020, 07:06 PM
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#1
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1 Rivet Member
1984 31' Excella
Montara
, CA
Join Date: Apr 2019
Posts: 11
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Waste outlet size on '84 Excella 31'
Our waste outlet on our '84 Excella 31 is 3-3/4" OD. We have a twist coupling fitting elbow that fits this waste outlet. The old sewer hose developed a leak so we bought a new Thetford Titan hose complete with fittings. The Thetford twist coupling is 3-1/2" ID so it's too small & won't fit on the outlet. We've searched far & wide and can't find a hose kit that will fit. So we cannibalized the hose kit and cut off the outlets but can't fit the hose on the twist coupling either. We can't find a hose that works either. Does anyone know who sells this bigger diameter sewer hose coupling & hose? Guess I can cut off the trailer coupling and glue on a new 3-1/2" ABS fitting but figured I would check here before modifying.
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06-30-2020, 08:22 PM
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#2
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,349
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Sounds like you have a Thetford brand hose that fits a Valterra bayonet.
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06-30-2020, 11:50 PM
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#3
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1 Rivet Member
1984 31' Excella
Montara
, CA
Join Date: Apr 2019
Posts: 11
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Well nothing "fits" so would you mind being a little more clear with a solution here?
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07-01-2020, 03:21 AM
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#4
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4 Rivet Member
1989 29' Excella
1979 31' Sovereign
1999 25' Safari
Youngsville
, North Carolina
Join Date: Sep 2006
Posts: 344
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Sewer Hose
The connection you have is a Thetford. They do make an adapter to allow you to use Valtera (Black) hose on a thetford fitting. Most campers today use Valtera fittings, much less $$$ than the Thetford, and available everywhere.
I would suggest cutting off White Thetford fitting and install a Valtera fitting.
Steve
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07-01-2020, 07:31 AM
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#5
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Rivet Master
1988 25' Excella
1987 32' Excella
Knoxville
, Tennessee
Join Date: Oct 2010
Posts: 5,095
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Yes, it is confusing. Older Airstreams have what is called Tetford fittings. Newer Airstreams and almost every other brand trailer have what is called Valterra fittings. Now for the confusing part: Tetford now makes hoses with Valterra fittings on them. That is what everybody uses and sells. You can order (but probably will not find in a store) a coupler that lets you convert the Tetford on your trailer to a Valterra. Stick it on with silicone caulk. Or, you can cut the end of the pipe off and glue on a Valterra adaptor as has been suggested. Outdoors mart Airstream sells the adaptor online. Amazon probably does too.
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07-01-2020, 09:31 AM
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#7
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3 Rivet Member
1964 30' Sovereign
Ione
, CA
Join Date: May 2019
Posts: 249
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Same problem with new tanks we had installed in our 1964 Sovereign 30'. We also found the https://www.amazon.com/Valterra-T05-...3612696&sr=8-2 adaptor. Works fine.
__________________
Mark & Melanie Trowbridge
1964 Airstream Sovereign 30' (Double)
2004 Dodge Ram QuadCab 4x4 Diesel
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07-01-2020, 03:10 PM
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#8
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New Member
1991 25' Excella
Currently Looking...
belmont
, North Carolina
Join Date: Jul 2018
Posts: 4
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I agree with Bill and imho the adapter isn’t worth it. Do it right - hacksaw the coupler off the old 3” waste line and glue a new on a Valtera. Less than a $5 fix.
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07-01-2020, 08:10 PM
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#9
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,349
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I have one of those adapters. Never used it. I don't believe it is either very secure nor leak proof.
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07-02-2020, 07:00 AM
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#10
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Rivet Master
1974 Argosy 26
Morrill
, Nebraska
Join Date: Nov 2009
Posts: 6,014
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The ears on the adaptor tend to break off.
Remove the old Thetford fitting and install a new Valterra fitting.
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07-08-2020, 10:40 AM
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#11
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4 Rivet Member
1976 24' Argosy 24
1999 30' Excella 1000
White Haven
, Pennsylvania
Join Date: Jul 2006
Posts: 402
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I use the adapter. I put it on and leaver it on. Have had no problems and can use the much cheaper valtera stuff.
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