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Old 08-09-2015, 03:05 PM   #1
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2006 22' Interstate
Pittsburgh , Pennsylvania
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Posts: 31
Black tank leak--Seek excellent repair shop

There's a leak in my 2007 Interstate black tank. My husband lifted the toilet and resealed it and we crossed our fingers. Didn't work. A trickle comes out from under the cabinetry on to the floor.

I took it to the Airstream dealership in Greensburg, Pa and they were no help at all. They seemed totally unfamiliar with the Interstate. I also called the company and they didn't help either. We aren't handy. Anyone know a great RV repair in western PA or eastern Ohio? Even northern W. Va would be OK. Thank you!

2007 Airstream Interstate
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Old 08-09-2015, 03:51 PM   #2
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1973 25' Tradewind
Augusta , Georgia
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If the tank is plastic try West Systems G/Flex Epoxy. This is a 2-part epoxy formulated for plastics. I haven't found much that it won't bond together. West Marine distributes most West Systems products.

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Old 08-10-2015, 04:04 AM   #3
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2014 Interstate Ext. Coach
Sedona , Arizona
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You may be better off if you re-post this in the Sprinter and B-van forum. More attention and definitely more replies!

Having said that, I do remember a post in which someone had their black tank vent pipe completely shear off at the join with the black tank. And this caused some content to escape when it was being driven. That may have been a later model, not sure, but worth considering in your case.

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Old 08-10-2015, 05:21 AM   #4
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Originally Posted by UKDUDE View Post
You may be better off if you re-post this in the Sprinter and B-van forum. More attention and definitely more replies!

"You wouldn't worry so much about what others think of you if you realized how seldom they do."

Eleanor Roosevelt

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Old 08-10-2015, 06:14 AM   #5
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Chelsea , Michigan
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The factory service center in Jackson Center Ohio is not in "eastern Ohio," but it is in central Ohio. If you don't find a solution closer to home, it would be worth a trip to get this done right. Nothing will ruin a trip faster than black tank product all over the floor.
Bob Martel
WBCCI# 5766
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Old 08-10-2015, 06:37 AM   #6
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League City , Texas
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Hello, knotdonne. I can't help you by naming a specific repair shop in your area, but I CAN tell you what to ask of a repair shop once you find one, and this is important because many repair shops have never set eyes on an Interstate before.

You may have one visible leak in the commode area that you know of thus far, but chances are good that your 2007 actually has more going on than just that one breach, and if you take it in for repair, you'll want to get everything examined at one time.

Our 2007 Interstate, which we bought lightly used less than a year ago with only about 26,000 miles on it, proved to have the following plumbing issues (which were unfortunately not discovered pre-purchase despite the fact that we paid an independent inspector to evaluate the vehicle):

(1) Black tank vent line sheared off the tank, leading to slosh of black water out the top of the tank and onto the interior floor. Repair sequence described here:


(2) Three lines sheared off the gray water tank. This was a bit trickier to notice because the gray tank is under the chassis and therefore leak evidence mostly ended up on the ground. Repair sequence in these posts (if these links don't work, search for The Interstate Blog on Blogspot and go to the Repairs tab):


^^ If you take that information to any reputable RV repair shop, it should help to get them oriented and give them a running start of what to check for with your model. We have the mid-bath 2007 but the general arrangement and construction materials appear to be the same on all of the 2007 Interstates that we've seen to date (mid-bath, rear-bath).

In finding an RV repair shop, if I were you I would avoid the urge to find an Airstream-affiliated shop and I would instead look for an independent operator. Local RV forums and review sites might be able to help you to identify one with a good reputation. I say this because, although my husband and I heard accounts of Airstream doing a lot of warranty fixes on plumbing on our vintage of Interstate, I would guess that there are no residual claims that could be made on vehicles as old as ours are now (the issue of whether these plumbing line breaks represent an initial product defect is another discussion entirely).

Hope this helps! Good luck with it.
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Old 08-10-2015, 12:13 PM   #7
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This is the thread I was thinking of; much the same info, but includes some pictures:

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