Go Back   Keystone RV Forums > Keystone Fleet | Keystone RV Models > Fifth Wheels
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 01-12-2018, 08:21 AM   #1
radar46
Junior Member
 
Join Date: May 2017
Location: Langley
Posts: 9
Black tank rinse problem.

Worked when I first bought the 2014 Cougar 5th a year ago but now no water flowing into the black tank. My first thought is a stuck inlet at connection but wondered if there are other areas to look for problem.
Appreciate any suggestions.
Thanks,
Warren.
__________________

radar46 is offline   Reply With Quote
Old 01-12-2018, 09:12 AM   #2
JRTJH
Site Team
 
JRTJH's Avatar
 
Join Date: Mar 2011
Location: Gaylord
Posts: 11,058
The water hose connector at the sidewall of your trailer has an one way valve inside it. The O-ring in that valve sometimes sticks or swells and makes it hard to open. If that happens, water won't flow into the black tank flush system. Sometimes waste (mainly toilet paper) will hang up on the flush system nozzle. If it dries there, it will act like "concrete" to stop the flow of water through the nozzle. Those are the two most probable causes "outside the anti-siphon valve which is located under the sink.

The first thing to check is the anti-siphon valve. You can check it by using a compressor at low pressure, cupping the valve in your hand and blowing air through it. Air should flow in one direction and not the other. If it "rattles" and air flows, then it's good unless it's dripping into the cupboard where it's located.


Sometimes the PEX hose will crimp either in the sidewall of the trailer or at the entry to the black tank and stoop water flow, but since your system was working last season, the hoses should not have "shifted to crimp" so that probably is not the issue.

If I were you, I'd fill the black tank from the toilet, add some black tank cleaner/digester, let it sit for a few days to a week, then dump the tank and try the black tank flush system. If it's that "concrete plug" over the nozzle, the water soak with digester should soften it enough to allow it to be washed off the holes in the nozzle. If that doesn't work, then the second place to look would be the water inlet on the side of your trailer.

Let us know what you find and good luck.
__________________

__________________
John



2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
JRTJH is offline   Reply With Quote
Old 01-12-2018, 09:43 AM   #3
flybouy
Senior Member
 
Join Date: Oct 2011
Location: Joppa, MD
Posts: 274
Could water be frozen in it? Don't know the conditions there but here in the mid Atlantic untill a day or so ago we've had record cold temps for several weeks.
__________________
2012 Laredo 303 TG
2010 F250 LT SCAB long bed 4X4 6.4 Turbo Deisel
flybouy is offline   Reply With Quote
Old 01-12-2018, 11:12 AM   #4
ken56
Member
 
Join Date: Aug 2017
Location: Dandridge
Posts: 62
Had mine do the same. Turned out to be the vacuum breaker was plugged. Tech told me it looked like it was full of sawdust. I have always used a filter on my water inlet so the stuff must have been in there since it was built.
ken56 is offline   Reply With Quote
Old 01-12-2018, 01:13 PM   #5
chuckster57
Site Team
 
chuckster57's Avatar
 
Join Date: Jul 2014
Location: Modesto
Posts: 6,280
Iíve seen the sprayer get clogged with toilet paper.
__________________

2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.

Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
chuckster57 is offline   Reply With Quote
Old 01-14-2018, 09:04 AM   #6
SkiSmuggs
Senior Member
 
Join Date: Oct 2012
Location: Vermont
Posts: 299
Ray of the Love Your RV YouTube channel did a video of trouble shooting this problem. He found the sprayer head was clogged when he removed it. He soaked it, cleaned it and reinstalled it. Some of the ideas above are good and don't involve cutting the coroplast.
__________________
2015 Ford F-350 XLT Ruby Red 6.7L Powerstroke, 4x4, Short Bed, Andersen Ultimate Hitch
Cougar High Country 299RKS, Mor/Ryde pin box, 200w solar
SkiSmuggs is offline   Reply With Quote
Old 01-14-2018, 10:57 AM   #7
Dave W
Senior Member
 
Dave W's Avatar
 
Join Date: May 2015
Location: Near Saratoga Springs,
Posts: 689
I understand that you want to have the flusher work, but on the past two 5ers have found that they really aren't much good with only a single point metered spray. I've found on ours that the black tank flows pretty slowly when being dumped which of course will cause solids to build. Camco has a flusher elbow that fastens to the dump outlet and does a great job back flushing that tank, much better then that puny spray from the built in system. I have been able to flush a lot more ... stuff then before. I also use the built in flusher with the macerator and it seems to work even better. I probably haven't used the factory flusher more then a couple times in the past year or two. I also have a home made flusher that I shove down the toilet but it's much less effective then the Camco gadget: https://www.amazon.com/Camco-39062-F.../dp/B000BUQOAE
__________________
Dave W, traveling with my DW, Susan and poodlepups, Callie and Molly with a 2011 F250 CCLB 6.7, B&W hitch and hauling a 2014 Montana HC 343RL
Dave W is offline   Reply With Quote
Old 01-14-2018, 01:59 PM   #8
radar46
Junior Member
 
Join Date: May 2017
Location: Langley
Posts: 9
Thanks to you all--I think the problem lies with the flusher in the tank. Is there a super sludge eater that is effective with gunk plugging the flusher jets in the tank? I do have a flexible wand but for now I am using the old tried and true method of dumping a 4-5 gal. bucket of H2O in the toilet with my wife holding the toilet open and the outside valve open-just watch your step going up the bathroom (only tripped once in my old rig).
radar46 is offline   Reply With Quote
Old 01-14-2018, 02:08 PM   #9
chuckster57
Site Team
 
chuckster57's Avatar
 
Join Date: Jul 2014
Location: Modesto
Posts: 6,280
The only way to clear/clean the rinser that I know of is to take it out. Not a fun job.
__________________

__________________

2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.

Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
chuckster57 is offline   Reply With Quote
Reply

Tags
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

All times are GMT -8. The time now is 11:35 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
This forum is owned and operated by Social Knowledge, LLC. It is not authorized or endorsed by the Keystone RV Company and is not affiliated with the Keystone RV Company or its related companies in any way. Keystone RV® is a registered trademark of the Keystone RV Company.