Go Back   Keystone RV Forums > Keystone Tech Forums > Repairs & Maintenance
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 08-20-2018, 08:39 AM   #1
Allesfam
Junior Member
 
Join Date: Jan 2016
Location: Bethlehem, PA
Posts: 8
Black tank leak

Water leaks from the top of my black tank when I turn on the flusher. This is our 3rd season with this camper but I'm thinking this has been happening since new. There was no way to locate this during the PDI without removing the plastic under-belly cover. When I noticed the liner sagging recently, I had no choice but to cut out a large section to inspect. What I found is water runs down from the top of the black tank when the flusher is turned on. The dump valve is open so it isn't pressurized or overflowing. I can only assume that the spray from the flusher is finding a crack or gap in the top of the tank to escape from. The black tank is mounted very securely and the toilet flange is glued in so I can't drop the tank easily to get a good look. It is not leaking where the flusher enters the tank because that area is exposed and no water is coming from there. I question why they glued the flange into the tank. Wouldn't a rubber gasket be better? That way the flange could slide into the tank and it would be more forgiving for slight movement or vibration. It would also be easier to remove or replace. Did they also glue the vent tube and the rear sink drain into the black tank? (While I was under there I discovered that the exterior kitchen sink empties into the black tank, instead of the gray). If they glued them, all of these pipes must be cut off to drop the tank. I did try to remove the toilet flange by removing the screws that mount it to the floor and gently lifting up on it. That is when I learned that it is glued in. Unfortunately, it doesn't seem to be glued all the way around. It moves up and down slightly on the one side but not the other so I'm thinking that the side that isn't glued so well is the source of my leak. I talked to my dealer and they are going to contact Keystone but I'm not counting on them covering this because I am outside the warranty period. Has anyone else had a problem like this? Anyone ever replaced the toilet flange? What is the best way to seal up the plastic underbelly cover once you have cut into it?
__________________

Allesfam is offline   Reply With Quote
Old 08-20-2018, 09:52 AM   #2
Jim & DJ
Senior Member
 
Join Date: Sep 2013
Location: Morgan
Posts: 221
Only leaks when using spray ?????
__________________

Jim & DJ is offline   Reply With Quote
Old 08-21-2018, 09:46 AM   #3
Allesfam
Junior Member
 
Join Date: Jan 2016
Location: Bethlehem, PA
Posts: 8
Quote:
Originally Posted by Jim & DJ View Post
Only leaks when using spray ?????
Yes, I suspect it will leak if I overfilled it or drove with enough liquid in the tank to splashed up to the top of the tank where the leak is. I'm hoping it is just where the toilet flange goes into the tank. That might be any easier repair that doesn't require the tank being dropped. If it is a crack or some other opening on the top of the tank, the whole tank will need to be dropped to expose it.
Allesfam is offline   Reply With Quote
Old 08-21-2018, 12:52 PM   #4
flybouy
Senior Member
 
Join Date: Oct 2011
Location: Joppa, MD
Posts: 1,014
Sounds to me like perhaps the line that connects the rinser to the tank has come loose or split and is leaking. The pipes going into black and gray tanks are typically what's called a spin weld and to remove the tank requires cutting the pipes.
__________________
2012 Laredo 303 TG
2010 F250 LT SCAB long bed 4X4 6.4 Turbo Deisel
flybouy is offline   Reply With Quote
Old 08-21-2018, 04:54 PM   #5
bobbecky
Senior Member
 
bobbecky's Avatar
 
Join Date: Jul 2013
Location: Box Elder
Posts: 1,110
This is how our flush line is connected to the front of our black tank. Can't imagine how the spray from the line or fittings would be making it to the outside top of the tank.
Attached Thumbnails
Click image for larger version

Name:	tank flush line.jpg
Views:	23
Size:	51.9 KB
ID:	18156  
__________________
Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
bobbecky is offline   Reply With Quote
Old 08-22-2018, 10:07 AM   #6
Allesfam
Junior Member
 
Join Date: Jan 2016
Location: Bethlehem, PA
Posts: 8
Thanks flybouy. I'm pretty certain the spin weld between the toilet flange and the black tank has failed. The flange extends down into the tank and the flusher enters the tank a few inches away from the flange so; water hits pipe, splashes up and out the failed weld, and then leaks down from the top of the tank.
Allesfam is offline   Reply With Quote
Old 08-22-2018, 12:01 PM   #7
flybouy
Senior Member
 
Join Date: Oct 2011
Location: Joppa, MD
Posts: 1,014
Quote:
Originally Posted by Allesfam View Post
Thanks flybouy. I'm pretty certain the spin weld between the toilet flange and the black tank has failed. The flange extends down into the tank and the flusher enters the tank a few inches away from the flange so; water hits pipe, splashes up and out the failed weld, and then leaks down from the top of the tank.
Sounds like a mess. I wish you luck with that.
__________________

__________________
2012 Laredo 303 TG
2010 F250 LT SCAB long bed 4X4 6.4 Turbo Deisel
flybouy is offline   Reply With Quote
Reply

Tags
leak, tank

Thread Tools
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
Forum Jump

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by the Keystone RV Company or any of its affiliates in any way. Keystone RV is a registered trademark of the Keystone RV Company.


All times are GMT -8. The time now is 10:34 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.