Thread Tools Search this Thread Display Modes
Old 12-08-2019, 10:42 AM   #1
2 Rivet Member
2004 25' Classic
Hanahan , South Carolina
Join Date: Jun 2018
Posts: 27
Strange dump valve size?

I have an 04 Classic 25’, new to me and am attempting my first dump...
It came with a new Camco hose and a used Rhinoflex hose. Neither fit...
It did have an adapter “thetford” that will connect to the camper, it will also connect to the discharge side of the hose but seems a little large to slide into the hose with a clamp.

I went to camping world to try and get an adapter but they do t have what I need in stock.

Is an 04 an odd size or was mine adapted? And any suggestions on what next?


Planenut is offline   Reply With Quote
Old 12-08-2019, 03:18 PM   #2
Rivet Master
2019 22' Sport
High River , Alberta
Join Date: Aug 2006
Posts: 506
Yes, the Thetford fitting seems a bit large. The hose will go on, but you will need to work at it.

Try dropping the end of the new hose in bucket of hot water.

Having owned both (and having rebuilt a pair of old Thetford valves), I’m happy with Valterra.

AlbertF is offline   Reply With Quote
Old 12-08-2019, 04:08 PM   #3
Rivet Master
A W Warn's Avatar

2000 25' Safari
1999 34' Excella
Davidson County , North Carolina
Join Date: Aug 2006
Posts: 4,108
You will have to do one of two things. Either use a Thetford sized hose end or get an adapter.
2014 Silverado LTZ 1500 Crew Cab 5.3L maximum trailering package
A W Warn is offline   Reply With Quote
Old 12-08-2019, 04:37 PM   #4
2 Rivet Member
2004 25' Classic
Hanahan , South Carolina
Join Date: Jun 2018
Posts: 27
It gets better, NOT.

See post #4
Planenut is offline   Reply With Quote
Old 12-09-2019, 05:36 PM   #5
Long time owner
2004 25' Classic
1974 25' Tradewind
1970 21' Globetrotter
1975 26' Argosy 26
Forrest City , Arkansas
Join Date: Sep 2011
Posts: 81
I also have a 2004 Classic and this summer I decided to purchase the Rhino Extreme dump hose. It did NOT fit. I came to find out that I would need an adapter that is sold by the Airstream Store. It is inexpensive. I was told that AS units before like 2008 have a different size than the newer models which converted over to the industry standard. Call the Store or go online to get it.
doctorlewis is offline   Reply With Quote
Old 12-09-2019, 06:04 PM   #6
Rivet Master
Al and Missy's Avatar

2002 30' Classic S/O
Melbourne Beach , Florida
Join Date: Nov 2013
Posts: 3,883
You can also buy a Valterra pipe fitting, cut the old Thetford fitting off and glue on the Valterra. When we picked up our 2002 Classic (trading our 2001 Safari which had a Valterra valve added after the two original valves) I moved my Camco hoses over to it but discovered they didn't fit. The dealership didn't have the adapter, but a Camping World on our route had the end fitting. I stopped in a Home Depot and bought a Dremel Tool to cut the old fitting off and some glue to glue the new one on. I changed it in the parking lot, in the cold, in the rain; but we could dump on the way home.


"You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO
WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins

Al and Missy is online now   Reply With Quote

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
Copper pipe from water heater - strange size? 69 safari 69airstream Water Heaters, Filters & Pumps 15 11-12-2015 07:17 PM
Dump Valve Size on '77 Safari? AldeanFan Waste Systems, Tanks & Totes 0 06-15-2013 07:45 PM
Strange Blackwater Tank/Dump Valve glang58 Waste Systems, Tanks & Totes 1 08-02-2010 12:27 AM
Dump Valve Will Not Open Darryl Waste Systems, Tanks & Totes 1 06-19-2002 12:19 PM
Dump valve gwsullivan Waste Systems, Tanks & Totes 11 05-30-2002 08:38 AM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 04:03 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.