Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 08-28-2003, 07:02 AM   #1
Chuck's Avatar

1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
Posts: 4,546
Images: 260
Explain this Dump Valve behavior.....

Sometimes my black tank dump valve leaks, and sometimes it doesn't. At a recent rally, I had the blue-thunder hooked up, and it seemed that it was filling up rather quickly...I suspected that we might be leaking, although when I emptied the blue tank, it didn't look/smell funny or anything...

so when I got home, I filled up the black tank w/ water to do a test. I threw some of that valve-lubricant stuff in there, while I was at it, and just let it sit for a while. I checked it every couple of days, and the panel indicators always said it was full. (I also looked at the outlet for signs of a drip...nothing) this continued for about a week. Then when I checked it, the panel indicator showed that it was down to 1/2. I looked in back underneath, and sure enough, there was a wet spot on the ground, and a "drip, drip, drip" coming from the outlet.

I understand that when you dump, its possible for crud to get caught in the seal, which could cause a leak. But why would the tank seal up fine, hold water for a week, THEN start leaking without having moved the valve?
Chuck is offline   Reply With Quote
Old 08-28-2003, 08:11 AM   #2
2 Rivet Member
1972 25' Tradewind
Rogers , Arkansas
Join Date: Sep 2002
Posts: 57
I had a similar problem. I finally carefully used a bent coat hanger to run in the groove where the dump valve blade seats. I made sure the coat hanger end was filed round so I didn't tear or score the seal and had a 90 degree bend in the end. I opened the valve and ran the valve seat. I didn't seem to remove anything, but the leak stopped. I tried this before I tried to replace the seal after I realized that I had to drop the belly pan if I was going to get access to the seal.
pepper48 is offline   Reply With Quote
Old 08-28-2003, 11:18 AM   #3
3 Rivet Member
Gordon Watt's Avatar
Join Date: Apr 2002
Posts: 117
Images: 9
Black Tank Leak

This summer I experienced a big leak when draining either of the tanks.

I found the drain pipe under the bumper area had separated. All that had to be done was to rejoin the rubber joiners and tighten the hose clamps.

I had to drop the rear of the pan.
Gordon Watt 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
Repacing blackwater dump valve Rick Alston Waste Systems, Tanks & Totes 9 05-30-2024 04:32 PM
Dump Valve Sneakinup Waste Systems, Tanks & Totes 27 05-23-2005 02:31 PM
Dump Valve Leak David Hall Waste Systems, Tanks & Totes 8 02-17-2004 05:26 PM
63 Safari Dump Valve Questions srgntpepper Waste Systems, Tanks & Totes 1 09-10-2003 06:40 PM
Dump Valve Rebuild wagsrp Waste Systems, Tanks & Totes 2 10-12-2002 01:01 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 01:01 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.