Sunline RV Forum
Sunline User Photos

Go Back   Sunline Coach Owner's Club > Technical Forums > Repairs and Maintenance
Click Here to Login

Join Sunline Club Forums Today

Thread Tools Search this Thread Display Modes
Old 12-15-2014, 09:14 PM   #1
EMD_Driver's Avatar
Join Date: Jul 2009
Location: West Virginia
Posts: 2,039
SUN #897
EMD_Driver is an unknown quantity at this point
Send a message via MSN to EMD_Driver Send a message via Yahoo to EMD_Driver
Leaky black tank valve?

I found this little writeup and thought it was worth sharing...

The dump valve slides open and closes in a groove that has a rubber O-ring on each side of a nylon flat plate. What often happens is this: If you slide your valve closed while the tank is still emptying, toilet paper and solids can get worked into the groove--keeping the slide plate from making a proper seal.

Before you leap into an expensive dump valve replacement, try this easy procedure for cleaning the groove and O-rings. First, fill your holding tank completely with a mixture of water and dish soap (the dish soap acts as a lubricant for the rubber seals around the dump valve slide plate). As the water is emptying, repeatedly open and close your valve. This action works the solids loose and the running water washes them away. You may have to repeat this process a couple of times.

SunlineClub Custom Google Search

2007 Peterson Excel Limited 30RKE
2014 Ford F350XLT SRW Crew Cab, Long bed 6.7PSD

EMD_Driver is offline   Reply With Quote
Old 12-16-2014, 06:59 AM   #2
Senior Member
Poppy & Nana's Avatar
Join Date: Nov 2006
Location: New York
Posts: 2,907
SUN #93
Poppy & Nana is an unknown quantity at this point
A simple fix - thanks Gary....

Kathy & Leo SUN 093
Central Adirondacks of New York
2013 Rubicon 2900 Toy Hauler
We loved our 2007 T-2499
2010 Ford F-350 4x4 Lariat Super Crew Dually Diesel
Poppy & Nana is offline   Reply With Quote
Old 12-16-2014, 08:08 PM   #3
Senior Member
Gene's Avatar
Join Date: Jan 2009
Location: Rhode Island
Posts: 1,515
SUN #768
Gene is an unknown quantity at this point
That sounds like a good simple idea, something to file in the memory banks ..... just in case .......

Thanks Gary

Gene & DW Ginny
2002 Sunline T-2363
2008 Toyota 4-runner 4wd 4.7L V-8
Reese Dual Cam straightline - P3 Brake controller
Gene is offline   Reply With Quote
Old 12-20-2014, 09:21 AM   #4
Senior Member
Join Date: Oct 2010
Location: New York
Posts: 162
SUN #1591
GKLarson is an unknown quantity at this point
Great Idea !
And a whole lot easier & more aromatic than a valve replacement

Glen & Kathleen
06 4.7L Tundra
06 T-1950, our 6 months/yr traveling home
one of numerous canoes
GKLarson is offline   Reply With Quote
Old 12-22-2014, 07:04 PM   #5
Senior Member
jim44646's Avatar
Join Date: Jul 2012
Location: Ohio
Posts: 1,055
SUN #4040
jim44646 is an unknown quantity at this point
Good idea to do occasionally as a preventative maintenance item.
Jim and DW Darlene
2001 T-2553 Sunline Solaris
2006 GMC Sierra Duramax 2500HD 4X4
Firestone Transforce AT tires
Reese Dual Cam Sway Control
jim44646 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
black tank valve jpspaz Repairs and Maintenance 8 04-05-2014 09:26 AM
Black water valve roempty Sunline Travel Trailers 7 09-06-2011 10:53 AM
Leaky fresh water tank in my T-2475 finewillie Repairs and Maintenance 6 04-29-2009 09:38 PM
grey tank valve question precorguy Modifications 1 10-22-2008 09:07 AM
Leaky Valve Stems kanyonkitty Repairs and Maintenance 5 01-09-2008 06:27 AM

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Sunline RV or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 08:39 AM.