Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 03-20-2012, 11:22 AM   #1
2 Rivet Member
2018 30' International
Boulder , Colorado
Join Date: Jul 2011
Posts: 96
Black tank gate valve doesn't close all the way

5 month old 27FB. The black tank gate valve will not push all the way in, maybe 1/2" shy of closing fully so that I can snap the clips on. The gate is sealed and not leaking and the tank completely drained and was flushed prior to closing. I notice there is a nut and thread on the end of the T handle. Is this to adjust the T handle so that the clips can be snapped in place as the handle doesn't close completely over time? It feels like the valve is seating and that nothing is caught in the slide...although this is subjective, it is not leaking at all. I'm stumped.
motozen is offline   Reply With Quote
Old 03-20-2012, 11:54 AM   #2
Rivet Master
2005 19' Safari
Join Date: Aug 2004
Posts: 2,453
That valve is like a knife blade sliding into a groove in rubber-like gasket material. If the handle won't fully close to the position it previously did, most likely there is some debris trapped in the groove. From previous experience, this is usually toilet paper or some other non- or less-soluble material, or a small item that dropped in the black tank (we have grandkids). In my experience, the trapped material doesn't usually flush out on its own. The valve will eventually leak, if it doesn't already; and you'll have to disassemble the valve assembly enough to remove the debris.

You may wish to purchase a replacement valve (which is only a few dollars); and have it on hand in case you need to replace it. Since your Airstream is new, the valve most likely is OK; in which case, you can save the new part as a spare (you'll need it at some time in the future).

While clogs are not entirely avoidable, this occurrence can be greatly reduced by only flushing the black tank when it is full. Before dumping, if necessary, fill the tank with fresh water to get a strong, powerful flush. Also, close the black water valve before flushing the gray water, as food debris can backwash into the black water valve area.

In addition, make sure that everyone knows that the toilet is not a trash can; and it should not be used to deposit facial tissues, baby wipes, feminine products, cotton swabs, cotton balls, and other items that may consider flush-able at home.
Phoenix is offline   Reply With Quote
Old 03-20-2012, 11:58 AM   #3
3 Rivet Member
1988 25' Excella
Trumbull , Connecticut
Join Date: Sep 2010
Posts: 197
Blog Entries: 1
Tank Gate Valve

Hello. If the gate valves closed before then there is something stuck in the grooves that the gate blade closes into. You are right the threaded shaft and T handle can be adjusted but if it did work before adjusting them now would only be covering up a problem.
The gate valve housings, on me 1988 Excella., are held togeather be 4 screws. Making sure the tank is empty take the housing apart and remove what ever is stuck in the grooves. Very easy to do.
Good luck Happy camping nm1oqrz
nm1oqrz is offline   Reply With Quote
Old 03-20-2012, 01:00 PM   #4
Wise Elder
Jammer's Avatar
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,169
My Airstream when new had the handles adjusted so that the valves were closed extremely tightly when the clips were on. You are correct that the locknuts can be loosened and the handles screwed in a little further to adjust things. If they closed all the way before without excessive force and now do not well maybe there's some debris in there but if it's been more or less of a problem since new and they could only ever be closed with considerable force then maybe they were set too snug at the factory.
Jammer is offline   Reply With Quote
Old 03-20-2012, 01:10 PM   #5
Rivet Master
drew05's Avatar
2011 25' FB Flying Cloud
Peculiar , Missouri
Join Date: Aug 2010
Posts: 524
Motozen, I had a similar problem with my black drain valve. As previously mentioned, make sure the valve is fully cleared. The nut can be loosened in order to close the valve completely. If this completely closes the valve,then this could be the fix.

My problem was either the extender between the threaded portion of the valve and the handle was too short (about 1 or 2 inches), or the plate was too far outward. I thought adding a longer extension would have worked, but the simple fix was to drill out the rivits holding the plate in place and moving it inward.

I found this out on our first trip. As I was dumping the tanks after a piece of plywood was flushed out, I noticed I couldn't close the valve completely, even though the nut was stopped against the plate. I adjusted the nut by the tee handle and the valve closed perfectly. (I'll reserve my comments about the wood and valve for a different thread).

drew05 is offline   Reply With Quote
Old 03-20-2012, 01:44 PM   #6
Rivet Master
Alumaholic's Avatar
2019 27' Flying Cloud
Albuquerque , New Mexico
Join Date: Nov 2005
Posts: 1,915
Images: 36
After dumping your black water tank, always flush two, full toilet bowls with the dump valve in the open position before you close it. This usually clears the toilet paper residue from the valve.
If you had X-Ray vision you would see toilet paper residue and man wipes left behind in the bottom of the drain pipe and valve.
Two flushes will carry this residue out the drain and down into the sewer.
Then, dump your gray-water tank to clean the line.
Ken L
2019 Flying Cloud 27FB
2020 GMC Sierra 1500 Crew Cab 6.2L Max Tow
Four Corners Unit WBCCI #5783
Alumaholic is offline   Reply With Quote
Old 03-20-2012, 02:25 PM   #7
4 Rivet Member
Chillpoints's Avatar
1992 29' Excella
Asheville , North Carolina
Join Date: Sep 2011
Posts: 291
Images: 7
possible fix

On my excella the valve is contained inside the metal cover around the tank and has a 90 degree bend in the pipe before the valve so visually inspecting or easy access is impossible. When I had the unfortunate "stuff" stuck in the valve I began by flushing the tank repeatedly until clear water was coming out. I was then able to insert a water jet power snake (as seen on T.V.)from the outside until it hit the closed valve. I then turned on the water, opened the valve and worked the snake in and out and was able to dislodge some of the bits and pieces out enough to get it to close completely. The end has 4 sideways jets in addition to the jet out the end. While this was not the cleanest job there is with an AS it was surly a whole lot easier than dropping the pan and disassembling the valve.
It may work for you also.
Drain Blaster® Water Powered Plastic Snake Drain Cleaner, Drain Blaster® Water Powered Plastic Snake Drain Cleaner Kits, Drain Blaster® Water Powered Plastic Snake Drain Cleaner Products
Jonathan Hettrick

'92 Excella 29'
Dodge Ram 1500
AIR # 59179
Chillpoints is offline   Reply With Quote
Old 03-20-2012, 02:37 PM   #8
Master of Universe
Gene's Avatar
2008 25' Safari FB SE
Grand Junction , Colorado
Join Date: Sep 2007
Posts: 12,382
Never assume the valve handle was adjusted properly when you took possession of the trailer, but if it closed completely when new, it should do so now.

I backflush the tank with a Flush King. That should loosen anything caught in there, but it may not. There is also available valve lubricant to make the slide work better and I use that periodically. The lubricant works somewhat, but is not magical. In the winter I put some RV antifreeze in the black and grey tanks to keep them lubricated.

Sometimes I can't get the handle in quite all the way and sometimes I can. It works stiffly, but can be used. I am avoiding taking it apart for obvious reasons, but that would be the best thing to do to look for debris after backflushing and lubricating.

Gene is offline   Reply With Quote
Old 03-25-2012, 12:15 PM   #9
Rivet Master
2005 19' Safari
Join Date: Aug 2004
Posts: 2,453
Just found this video on It covers several brands of waste valves and shows how the seals, etc. fit together: : B004RCXC1G
Phoenix is offline   Reply With Quote
Old 03-25-2012, 01:23 PM   #10
Rivet Master
Commercial Member
vinstream's Avatar
1962 19' Globetrotter
1963 19' Globetrotter
1961 19' Globetrotter
Wheat Ridge , Colorado
Join Date: Dec 2007
Posts: 624
Images: 2
It sounds like to me that the rubber seal is bad and needs to be replaced. You can do this your self by removing the rubber seal by disassembling the valve and replacing them. Or because it is so new the dealership should in my mind fix it for you for free.

If the seal is not pinched in place just right when installed this is a common problem!

Hope that helps!
Wheat Ridge, Colorado
WBCCI # 1962
Instagram #Vinstream
vinstream is offline   Reply With Quote
Old 04-24-2012, 09:28 PM   #11
2010 25' FB Flying Cloud
Danville , Pennsylvania
Join Date: Jun 2011
Posts: 13
How do you get at the valves to repair them? On my 2010 Flying Cloud, the valves are completely enclosed.
pjmoser is offline   Reply With Quote
Old 04-24-2012, 09:44 PM   #12
Rivet Master
AWCHIEF's Avatar
2006 23' Safari SE
Biloxi , Mississippi
Join Date: Nov 2011
Posts: 8,278
Images: 33
Would this be covered under warranty? Knowing what a new Airstream cost I would make Airstream fix every little problem.

Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
AWCHIEF is offline   Reply With Quote
Old 04-25-2012, 08:47 AM   #13
2 Rivet Member
2018 30' International
Boulder , Colorado
Join Date: Jul 2011
Posts: 96
I have an app't at Windish in Denver next month to take it in to fix a laundry list of items...including a failed refrigerator! I will post what they do to fix the valve problem.
motozen is offline   Reply With Quote
Old 05-05-2012, 10:32 PM   #14
2010 25' FB Flying Cloud
Danville , Pennsylvania
Join Date: Jun 2011
Posts: 13
I tried to purchase a Drain blaster water powered plastic snake drain cleaner. The web site lists these, however, no prices are given, and clicking on the Drain blaster does not add it to the shopping cart. Any one know how to purchase one of these?
pjmoser is offline   Reply With Quote
Old 09-08-2014, 02:38 AM   #15
New Member
Antananarivo , Quebec
Join Date: Sep 2014
Posts: 1
This is a great device! I found some more information on this website: Gate valves, Gate taps - All industrial manufacturers - Videos
Akime123 is offline   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
How does one tie in the TV to the speaker system urnmor Electronics & Connectivity 31 01-03-2013 06:42 AM
Photos of my 1971 Streamline...before the work begins gmaof20 Vintage Kin 9 06-25-2012 10:11 AM
The "95" Question monkeypants On The Road... 2 03-28-2012 06:11 PM
Started the Clean and Wax routine today. Bruce B Clearcoat, Exterior Paint & Trim 12 03-20-2012 09:32 AM
2010 ventura; like new; motion sat. (k/w: Airstream roadtrek pleasure way era) eBay Watch Airstreams on eBay 0 03-19-2012 06:10 PM

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 06:54 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.