Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-21-2011, 04:03 PM   #1
Elliot/Barbara
 
ElliotA's Avatar
 
2006 28' Safari S/O
Fort Collins , Colorado
Join Date: Aug 2011
Posts: 27
Black Water Flush Blocked

I just picked up a 2006 28' Safari that had basically never been used. The owner lived in it for three months while she built a house and after that it had been sitting in a field for over 4 year.

When I first took it out I found that the black water tank discharge was clogged with toilet paper and I used a flush adapter on my sewer hose and a hose wand to wash it all loose. I assume she never used chemicals and used regular toilet paper.

Everything seems to work right now except that there is a blockage in the built in black water flush system. When I connect a hose to it no water goes into the black water tank and all I get is an overflow around the skid plate protecting the black water tank. I checked inside the bathroom where you can see the plumbing for this system and there are no leaks there.

Is there a valve or something that needs to be opened? Remember this trailer has almost never been used and for sure the black water flush had never been used.

Elliot
__________________

__________________
ElliotA is offline   Reply With Quote
Old 09-21-2011, 04:17 PM   #2
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,403
Images: 5
I sounds to me like there is a leak where the BW flush line enters the black tank. If that's the case, it will involve some disassembly to get to it. I am not sure of your unit's setup, but on mine, I believe I would have to drop the tank pan and tank. Or, at least CUT an access into the pan.

I would tell you to just forget using the flush system, (many seem to think it is ineffectual at best anyway) except if you do have a leak there, I believe you will leak black water into the pan whenever the level is as high as the flush head. That could be NASTY!
__________________

__________________
dznf0g is offline   Reply With Quote
Old 09-21-2011, 05:40 PM   #3
Rivet Master
 
Silver Goose's Avatar
 
2008 27' Classic FB
Burkburnett , Texas
Join Date: Jul 2010
Posts: 955
Look for this valve. I found this under the closet on my 27FB. It may be elsewhere in different floorplans. It could be anywhere in the line between your BW flush connector and the tank sprayer and should be in some accessible location (under sink?). Mine was secured too tightly to the wall from the factory and was cracked allowing water to run out under the belly when I tried to use it.

If you can get a visual on the valve, have your helper turn on the water. The water pressure moves the piston to the upper position, applying pressure to the ball/spring valve and then passing on to the sprayer. The ball valve is supposed to prevent back flow and when pressure is removed, the piston drops to the lower position allowing the input line to self drain.

By observing this valve, you should be able to determine if it or its connections are the problem or if the leak is beyond at the much less accessible sprayer head.
Attached Thumbnails
Click image for larger version

Name:	image-3111381266.png
Views:	134
Size:	464.0 KB
ID:	140691  
__________________
AIR 47751
Air Safe Hitch, Reese Dual Cam 800#, Centramatics
Silver Goose is offline   Reply With Quote
Old 09-21-2011, 05:47 PM   #4
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,403
Images: 5
Quote:
Originally Posted by YankeeDoodle View Post
Look for this valve. I found this under the closet on my 27FB. It may be elsewhere in different floorplans. It could be anywhere in the line between your BW flush connector and the tank sprayer and should be in some accessible location (under sink?). Mine was secured too tightly to the wall from the factory and was cracked allowing water to run out under the belly when I tried to use it.

If you can get a visual on the valve, have your helper turn on the water. The water pressure moves the piston to the upper position, applying pressure to the ball/spring valve and then passing on to the sprayer. The ball valve is supposed to prevent back flow and when pressure is removed, the piston drops to the lower position allowing the input line to self drain.

By observing this valve, you should be able to determine if it or its connections are the problem or if the leak is beyond at the much less accessible sprayer head.
Although the layout may vary between floorplans, my airbreak also leaked, but it showed as dripping at the joint between the belly pan and the rolled gray sheet (at the frame) as well as through the city water access compartment, outboard and rearward of the tank pan. I had no dripping at the pan
__________________
dznf0g is offline   Reply With Quote
Old 09-22-2011, 09:35 PM   #5
Elliot/Barbara
 
ElliotA's Avatar
 
2006 28' Safari S/O
Fort Collins , Colorado
Join Date: Aug 2011
Posts: 27
I checked the airbreak valve as suggested and it seems to work OK and is not leaking. I guess there is a breakage where the line enters the tank.

Is this something that could have happened due to freezing weather? I had to replace the Thetford toilet valve as it was cracked and leaking due to not being drained and freezing.
__________________
ElliotA is offline   Reply With Quote
Old 09-22-2011, 10:36 PM   #6
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,403
Images: 5
Probably not, unless the black tank was significantly full during the freeze. I suspect just a bad fitting of the spray head into the tank.
__________________
dznf0g is offline   Reply With Quote
Old 04-01-2017, 07:26 PM   #7
Rivet Master
 
KJRitchie's Avatar

 
2008 25' Classic
Wichita Falls , Texas
Join Date: Nov 2012
Posts: 4,217
When I winterized last December I was at a campground with full hook ups. It was about 32F. I was able to fill the black tank up to almost full, dumped, the tried to fill up the black tank again via the flush. No water was coming into the tank. My black tank flush line has no one way valve. It was broken and replaced it back in 2013 with an elbow fitting. I figured it was just cold or maybe frozen so I didn't worry about it. I just dewinterized, the temperatures in the 70s and the black tank flush line is still plugged. There is no screen on the black tank hose fitting so maybe their is grit in the line. I'm wondering if hard water can plug the small holes. I may try putting a water softener in the tank and also pumping is some CLR to the valve to see if I can clear it. If that doesn't work looks like I'm going to have to get the valve replaced.

Kelvin
__________________

__________________
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
KJRitchie is offline   Reply With Quote
Reply

Tags
waste water flush, black tank, plumbing


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
Help! Faucet water is black! Skatiero Water Heaters, Filters & Pumps 11 10-14-2011 09:51 AM
My toilet won't flush on city water godaddy64 Plumbing - Systems & Fixtures 12 09-18-2011 03:37 PM
Black water flush system mjayjensen Waste Systems, Tanks & Totes 4 07-10-2011 06:21 PM
Black water flush woodssd Waste Systems, Tanks & Totes 3 06-08-2011 01:19 PM
Noobie black water question pappy19 Waste Systems, Tanks & Totes 9 05-25-2011 10:52 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

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


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.