RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
 

Go Back   Keystone RV Forums > Keystone Fleet | Keystone RV Models > Travel Trailers
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 04-25-2019, 04:55 PM   #1
Irishman2014
Junior Member
 
Join Date: Mar 2019
Location: HUNTINGTON BEACH
Posts: 16
Black Tank continually registering full

Hello all. We have a 2014 Cougar CCH 27RLS that we purchased from a dealer about 2 months ago. We've used it a couple of weekends and for the most part its fantastic and we really enjoy it (first timers). There's a control panel that is for turning on the lights, HW tank, water pump, slide out, etc. That same control panel also tells us how full our water tank, gray tanks and black tank are. I've dumped our tanks (black first followed by the two gray tanks). I know that they are emptying because you can feel the water rushing out through the dump hose. I then rinse out the black tank by utilizing the built in spray system (keystone calls it "no fuss flush kit"). When I check the status of the tanks on the control panel it shows the gray and water tanks are empty, but the black tank is 3/4 to completely full. Anyone run into this before? If so, how did you correct it? Thanks in advance for your help.
__________________

Irishman2014 is offline   Reply With Quote
Old 04-25-2019, 05:02 PM   #2
KeithInUpstateNY
Senior Member
 
KeithInUpstateNY's Avatar
 
Join Date: Feb 2017
Location: Potsdam
Posts: 319
If you search "black tank sensor" you will find tons of threads with a multitude of ideas on how to deal with it. Long story short, the sensors read from the top down, so if there is something stuck to the top (full) or next (3/4) sensor that is what it reads. Many of us just don't rely on them.
__________________

__________________


2015 Bullet 220RBI
2019 Chevy Colorado extended cab V6 3.6 liter
KeithInUpstateNY is offline   Reply With Quote
Old 04-25-2019, 05:05 PM   #3
Tbos
Senior Member
 
Join Date: Jul 2014
Location: Solomons
Posts: 3,874
The tank meters routinely are inaccurate. There is probably some TP stuck on it. If your sure itís clean then it will be ok. If you donít use it for a week or so the sensor may dry and work until it gets wet again. Enjoy your new rig.
__________________
Tom
2019 Alpine 3651RL
2016 F350 CC DRW
Tbos is offline   Reply With Quote
Old 04-25-2019, 05:22 PM   #4
rjrelander
Senior Member
 
Join Date: Jul 2017
Location: Chaska MN
Posts: 182
Ours is always out of whack as well. You could put a piece of black tape over the display when you dump, then peel back the tape a little every time someone flushes.
__________________


Randi & Shirley
2017 Keystone Summerland Mini 1750RD
2012 GMC Sierra 1500
rjrelander is online now   Reply With Quote
Old 04-25-2019, 05:55 PM   #5
chuckster57
Site Team
 
chuckster57's Avatar
 
Join Date: Jul 2014
Location: Modesto
Posts: 12,438
Or, you could use ďtissue digesterĒ. Use the entire contents, fill the tank. Let it sit for 3 days then drive it around making some hard stops to shake things up. Then dump and rinse. Next aggressive treatment is Rid-X. Let it sit with the tank full for a week or two.

All my sensors on any RV that I have owned or worked on have worked, some after treatments.
__________________

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 04-25-2019, 07:26 PM   #6
FlyingAroundRV
Senior Member
 
FlyingAroundRV's Avatar
 
Join Date: Oct 2017
Location: Brisbane Australia
Posts: 637
You could also try the ice in the black tank trick.
Throw a couple f bags of crushed ice down the toilet and a bucket or two of water. Then take the trailer out for a reasonable length drive of say two hours or so. Then dump and flush the black tank and see how that goes.
FlyingAroundRV is offline   Reply With Quote
Old 04-25-2019, 07:58 PM   #7
busterbrown
Senior Member
 
busterbrown's Avatar
 
Join Date: Feb 2016
Location: SE Michigan
Posts: 1,652
As stated before, black tank are notorious for reading incorrectly, even after a good tank fill and flush with an onboard "no fuss flush kit".

Sometimes, it takes a little more physical "encouragement" to get the deposits off the tank sensors. You may want to invest in one of these:

https://www.walmart.com/ip/Camco-Swi...xoCuIoQAvD_BwE

This wand in line with a good amount of water pressure from a garden hose can be placed down and through the toilet bowl valve into the black tank. Let the water blast the walls of the tank by changing the angle of the wand. Just make sure you start with an empty tank.

It's worked for me. I usually do this at the end of each season.

https://youtu.be/xJRvK6rU_-k

For regular black tank maintenance, look up "geo method". It incorporates using a water softener and detergent of your choice. It helps keep the tank clean and reduces smells significantly.
__________________
2017 Keystone Bullet 308BHS in Saddle.
2017 RAM 2500 Laramie Mega Cab 4x4 Hemi 6.4L
2008 GMC Yukon XL Denali (SOLD)
Hensley SwiftArrow Control Hitch with 1000 lb Spring Bars
Me, DW, (3) little DS's, and 1 rambunctious Boston Terrier

busterbrown is offline   Reply With Quote
Old 04-25-2019, 08:17 PM   #8
Irishman2014
Junior Member
 
Join Date: Mar 2019
Location: HUNTINGTON BEACH
Posts: 16
These are all great ideas and a lot of good information that I will use. If I can get the monitor to register correctly I will let everyone know what worked. Thanks very much.
Irishman2014 is offline   Reply With Quote
Old 04-26-2019, 04:29 AM   #9
{tpc}
Senior Member
 
Join Date: Apr 2014
Location: Berkley
Posts: 623
For what it's worth (likely nothing), ours worked on the 1st trip, and has read empty ever since then. I assume a wire broke or the sensor isn't good, but its been a few years and it hasn't changed. That said we have only had one issue with the black tank being full and not knowing it, and its pretty easy to figure out lol. I think that was during our 3rd ever trip. Since then never been a problem. Fresh and gray work as designed.

Really, the gray is the only one I ever am concerned with and pay attention to. The fresh kinda tells you when its out lol.
__________________
2020 Ford F150 5.0 V8 SCrew 4x4
{tpc} is offline   Reply With Quote
Old 04-26-2019, 06:16 AM   #10
labman
Senior Member
 
Join Date: Jul 2017
Location: Rural Minnesota
Posts: 102
Mine was having issues for a while. I faithfully flushed the black tank after each trip but only for about 5 or ten minutes. While in AZ this winter I let the tank flush for 30 to 45 minutes. After that, it registers correctly.
__________________
"Once you can accept the universe as matter expanding into nothing that is something, wearing stripes with plaid comes easy. " Albert Einstein
labman is offline   Reply With Quote
Old 04-26-2019, 06:20 AM   #11
JRTJH
Site Team
 
JRTJH's Avatar
 
Join Date: Mar 2011
Location: Gaylord
Posts: 19,621
Like Tony and others have said, You'll know when the black tank is full, no reason to fret over it.....

In every trailer I've had with tank gauges, the black tank sensors have fouled and have read incorrectly. Usually it always reads 3/4 or full. Also, in every trailer I've had, the toilet has a "peculiar sound" when the tank gets close to being full. We have learned to rely on "toilet flushing sounds" to tell us when the tank is nearing full capacity. We've found that the sounds are far more accurate than the gauges ever were.

I'd think that if you pay attention to what your toilet is telling you, you really don't need the gauge anyway. For us, from 1967 until about 1993, none of our trailers even had a tank gauge. We did just fine "back then" and the only thing that's changed is a set of buttons and LED's on the wall that usually don't work anyway. This is one time when KISS really works as well (or even better) than "modern technology".....
__________________
John



2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
JRTJH is online now   Reply With Quote
Old 04-26-2019, 07:18 AM   #12
jsb5717
Senior Member
 
jsb5717's Avatar
 
Join Date: Mar 2019
Location: Milwaukie, OR
Posts: 522
Agreed, I've had 3 trailers with guages and none of them ever worked. There are far better systems on the market for accurate tank levels. It would be nice if the manufacturers used those rather than the current proven failures.
__________________
Jeff & Sandi (and Teddy - 7lb Schnorkie)
2018 Montana High Country 305RL
2012 RAM 3500 Crew Cab 4x4 SRW
Andersen Ultimate Hitch on B&W Turnover Ball
jsb5717 is offline   Reply With Quote
Old 04-26-2019, 07:23 AM   #13
chuckster57
Site Team
 
chuckster57's Avatar
 
Join Date: Jul 2014
Location: Modesto
Posts: 12,438
Quote:
Originally Posted by jsb5717 View Post
Agreed, I've had 3 trailers with guages and none of them ever worked. There are far better systems on the market for accurate tank levels. It would be nice if the manufacturers used those rather than the current proven failures.
Probably the biggest reason is economics. The system is cheap and easy to install. See Level comes to mind but at close to $300.00 I don't think people are that ready to spend the higher price. That system is standard on the Allegro Bus we sell but that coach will set you back in excess of $450,000.00
__________________

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 04-26-2019, 07:32 AM   #14
jsb5717
Senior Member
 
jsb5717's Avatar
 
Join Date: Mar 2019
Location: Milwaukie, OR
Posts: 522
Yeah, I was thinking about See Level too. I'm sure it's economics, but when you're spending 40-50K or a lot more on a towable an extra $300 is easily buried in the overall cost. I, for one, would gladly spend the relatively little bit extra for a system that works.

For us it's actually accurate gray water levels that would be helpful. As JRTJH stated, the black water is pretty easy to keep track of.
__________________
Jeff & Sandi (and Teddy - 7lb Schnorkie)
2018 Montana High Country 305RL
2012 RAM 3500 Crew Cab 4x4 SRW
Andersen Ultimate Hitch on B&W Turnover Ball
jsb5717 is offline   Reply With Quote
Old 04-26-2019, 02:01 PM   #15
JRTJH
Site Team
 
JRTJH's Avatar
 
Join Date: Mar 2011
Location: Gaylord
Posts: 19,621
Quote:
Originally Posted by jsb5717 View Post
Yeah, I was thinking about See Level too. I'm sure it's economics, but when you're spending 40-50K or a lot more on a towable an extra $300 is easily buried in the overall cost. I, for one, would gladly spend the relatively little bit extra for a system that works.

For us it's actually accurate gray water levels that would be helpful. As JRTJH stated, the black water is pretty easy to keep track of.
If you look through the "why didn't those dummies at Keystone" threads in this forum, you'll find that members wish Keystone would have "spent just a little more" for things like tires, stereo, steps, decals, carpet, TV size/brand, appliances, awnings, windows, furniture upgrades, dual pane windows, air conditioner, cupboard/cabinet finish, vinyl flooring, toilet, faucets, shower doors, mattresses, door locks, window coverings, CO monitor, smoke alarms, CH751 access key sets, bumper strength, hitch receiver, improved running lights (just to name a few recent complaints).....

As you can see, if Keystone "catered to all our wishes" (including high dollar tank sensor systems) we'd all be paying much more than "just a little more" for our trailers. They'd all be "in the Allegro Bus range" (450K+)
__________________
John



2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
JRTJH is online now   Reply With Quote
Old 04-26-2019, 02:26 PM   #16
daveinaz
Senior Member
 
Join Date: Dec 2018
Location: Sun City
Posts: 149
We've used the aforementioned ice trick before with success. Otherwise, buy that toilet wand that attaches to hose and give it a good rinse from the toilet side.
daveinaz is offline   Reply With Quote
Old 04-26-2019, 03:19 PM   #17
jsb5717
Senior Member
 
jsb5717's Avatar
 
Join Date: Mar 2019
Location: Milwaukie, OR
Posts: 522
Quote:
Originally Posted by JRTJH View Post
As you can see, if Keystone "catered to all our wishes" (including high dollar tank sensor systems) we'd all be paying much more than "just a little more" for our trailers. They'd all be "in the Allegro Bus range" (450K+)
Excellent point. I guess we buy what we can afford and live with or fix the rest. It's still a fun journey and some battles simply aren't worth the fight.
__________________
Jeff & Sandi (and Teddy - 7lb Schnorkie)
2018 Montana High Country 305RL
2012 RAM 3500 Crew Cab 4x4 SRW
Andersen Ultimate Hitch on B&W Turnover Ball
jsb5717 is offline   Reply With Quote
Old 04-26-2019, 08:23 PM   #18
travelin texans
Senior Member
 
travelin texans's Avatar
 
Join Date: Nov 2017
Location: Picacho Peak Rv Resort
Posts: 3,925
Buy a clear 45 or 90 degree fitting, place it on the rv sewer connection then connect your 3" hose, add ice &/or chemicals whichever makes you feel good, then pull the handles, drain/flush, once you don't see anything running through that clear fitting the tanks are empty, then close the handles & FORGET about the worthless sensors.
__________________
Danny & Linda
Former '13 Redwood FB owner
Currently rvless!
travelin texans is online now   Reply With Quote
Old 05-01-2019, 10:39 AM   #19
Froglaw
Junior Member
 
Froglaw's Avatar
 
Join Date: Aug 2017
Location: Dallas
Posts: 11
If you have an exterior Black Tank Flush, hook up and run it for 30 minutes. You have to be at a dump station or a slot with full hook ups.

I was in Valdez, AK and my neighbor had a really nice Airstream that required a big flush every few weeks.

Doesn't hurt to run fresh water through the system in order to avoid build up, smells, etc.
Froglaw is offline   Reply With Quote
Old 05-01-2019, 11:44 AM   #20
Cbrez
Senior Member
 
Cbrez's Avatar
 
Join Date: May 2015
Location: Virginia Beach, VA
Posts: 384
Welcome to the black tank always full club. You can fight it or go with the flow. We fought it for the first couple of years - using the Geo Method mostly - but nothing seemed to work so we are now blissfully happy going with the flow. Never had the black tank overflow. Even though we treat after every dump, the odors donít stay below deck as it gets close to full.
__________________

__________________

Steve & Diane
2015 Montana 3402RL
2017 F350 Super Duty Lariat 6.7 Powerstroke, Super Cab, Long Box, 4WD DRW
18K PullRite Super 5th ISR
Cbrez is offline   Reply With Quote
Reply

Tags
black tank, 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 RVģ is a registered trademark of the Keystone RV Company.


All times are GMT -8. The time now is 12:35 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×