Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
 
 


Reply
 
Thread Tools Display Modes
 
Old 06-13-2021, 09:37 PM   #1
New Member
 
Join Date: Aug 2020
Location: AL
Posts: 14
Default Black tank showing full after discharging (found fix)

My black tank indicator was showing nearly full after emptying. My dilemma was it really empty (as I thought it was) or was something jammed up in the hose that was preventing discharge? Not wanting to do any exploratory surgery on the black tank, I was perplexed. And then I was given this tip ..... dump a few pounds of ice down the commode and go for a drive. I was told that sometimes a piece of TP may get hung on the sensor creating a condition where the tank seems full when it is not. The above tip worked for me. The ice jostled the sensor gremlin..... hope it helps.
__________________

Kegan is offline   Reply With Quote
Old 06-13-2021, 10:01 PM   #2
Platinum Member
 
rowiebowie's Avatar
 
Join Date: Jul 2018
Location: Texas
Posts: 2,393
Default

Good tip. My unit has a sani-flush attachment that I use periodically as a precaution. Hooked up a presurized water hose, there is a multi-directional sprayer head in the tank that rinses it out well.
__________________

rowiebowie is offline   Reply With Quote
Old 06-20-2021, 04:25 PM   #3
Platinum Member
 
Join Date: May 2018
Location: California
Posts: 223
Default

Ice down the toilet is a good tip. I'll give it a try because I almost never get a true reading right after dumping. Eventually it seems to settle down.

I like the idea of being able to spray-clean the inside of the tank. I've seen others at dump stations attaching a hose to a fitting higher than their black tank could be, and running water through it. They must have the Sani-flush installed. I'l try to spec this feature on my next unit.
rvsprinterguy is offline   Reply With Quote
Old 06-20-2021, 04:29 PM   #4
Bronze Member
 
Join Date: Oct 2020
Location: Texas
Posts: 38
Default

If you have an in-tank spray head, be sure to use a pressure limiting connector. Before I learned this, I blew up my inlet and it was quite a project to replace the line.
theHueg is offline   Reply With Quote
Old 06-20-2021, 06:08 PM   #5
New Member
 
Join Date: Sep 2015
Location: Quebec
Posts: 11
Default

Ice give good result but recently I disolve diswasher soap in hot water and then pour it in the toilet with some gallons of water and it give me good result too.
Denis100 is offline   Reply With Quote
Old 06-20-2021, 07:07 PM   #6
New Member
 
Join Date: Oct 2017
Location: PA
Posts: 7
Default Ice in the black tank

That is an old boater's trick that always worked well for me. Fill her up, hit some bumpy waves (roads), and flush with hot water!
blues46 is offline   Reply With Quote
Old 06-21-2021, 01:31 AM   #7
Silver Member
 
Join Date: Apr 2017
Location: MA
Posts: 58
Default

Quote:
Originally Posted by Kegan View Post
My black tank indicator was showing nearly full after emptying. My dilemma was it really empty (as I thought it was) or was something jammed up in the hose that was preventing discharge? Not wanting to do any exploratory surgery on the black tank, I was perplexed. And then I was given this tip ..... dump a few pounds of ice down the commode and go for a drive. I was told that sometimes a piece of TP may get hung on the sensor creating a condition where the tank seems full when it is not. The above tip worked for me. The ice jostled the sensor gremlin..... hope it helps.
Caution with RV's that have macerating toilets - does the ice ruin the toilet macerator? Does the ice get stuck (or melt) on its way through the long tube that connects the toilet to the black tank?

My combo grey/black tank frequently says it's full just after it's been emptied... I've always attributed this to either foam (wrong kind of dish detergent being used, or something used in the shower) or the tank being emptied without first having been truly full. Happy Camper tank treatment + a high ratio of water to anything else flowing through the system = a happy tank
JeanM is offline   Reply With Quote
Old 06-21-2021, 02:51 AM   #8
Platinum Member
 
rowiebowie's Avatar
 
Join Date: Jul 2018
Location: Texas
Posts: 2,393
Default

Quote:
Originally Posted by JeanM View Post
Caution with RV's that have macerating toilets - does the ice ruin the toilet macerator? Does the ice get stuck (or melt) on its way through the long tube that connects the toilet to the black tank?
Good catch. Yes, the ice method is not for macerator toilets. The macerator blades would likely be destroyed. In the off chance they survived (which is unlikely) they would turn the ice into slush which defeats the intended purpose of having floating chunks of ice sloshing in your black tank.
rowiebowie is offline   Reply With Quote
Old 06-21-2021, 01:05 PM   #9
Platinum Member
 
Join Date: Feb 2015
Posts: 1,390
Default

Quote:
Originally Posted by Kegan View Post
My black tank indicator was showing nearly full after emptying.
That is the norm. The only time the black tank gauge in any of my rigs showed empty was before they had been used. Those of us who have the inside the tank sensors really needn't ever bother to even look at that gauge because it is pretty useless.

Back in 2004 with my first van, I tried all of those tricks... geo method... ice cubes... and the next time the tank was filled and emptied, again it would still say filled. I even followed my father's RV toilet rule that anything that enters the tank must have passed through your mouth. Thus no TP ever. It still would never show empty. So... why bother? I have better things to do than spend half of the day trying to make a lousy gauge system work. I quickly learned to know when the tank was full, and if it mattered, I could always peek into the tank with a flashlight. Basically I just dump after every trip... or on long trips when I have the opportunity to do so. Empty... fill once with water... and empty again.

Enough...

I always used Happy Camper and if you go to their website, they have good practical advice for care of a black tank. Though ours on a Class B are so small that one must keep that in mind. It is great for controlling smells in both the black and gray tank.
__________________
2021 Promaster 1500 118wb conversion
2019 Roadtrek Simplicity SRT (almost a Zion)
2015 Roadtrek 170
2011 LTV Libero
2004 GWV Classic Supreme
mumkin is offline   Reply With Quote
Old 06-21-2021, 01:38 PM   #10
New Member
 
Join Date: Aug 2020
Location: AL
Posts: 14
Default

Quote:
Originally Posted by JeanM View Post
Caution with RV's that have macerating toilets - does the ice ruin the toilet macerator? Does the ice get stuck (or melt) on its way through the long tube that connects the toilet to the black tank?

My combo grey/black tank frequently says it's full just after it's been emptied... I've always attributed this to either foam (wrong kind of dish detergent being used, or something used in the shower) or the tank being emptied without first having been truly full. Happy Camper tank treatment + a high ratio of water to anything else flowing through the system = a happy tank
As I understand the tip, you don't run the ice thru the macerator. You add the ice, promptly drive around to slosh any 'solids' that might be interfering with the sensor or whatnot and once the ice has melted, dump as normal. Good to hear that the sensor issue is a common one.
Kegan is offline   Reply With Quote
Old 06-21-2021, 02:26 PM   #11
Platinum Member
 
Davydd's Avatar
 
Join Date: Aug 2007
Location: Minnesota
Posts: 5,300
Default

Quote:
Originally Posted by JeanM View Post
Caution with RV's that have macerating toilets - does the ice ruin the toilet macerator? Does the ice get stuck (or melt) on its way through the long tube that connects the toilet to the black tank?

My combo grey/black tank frequently says it's full just after it's been emptied... I've always attributed this to either foam (wrong kind of dish detergent being used, or something used in the shower) or the tank being emptied without first having been truly full. Happy Camper tank treatment + a high ratio of water to anything else flowing through the system = a happy tank
It is unclear to me whether you are mentioning the macerator from the black tank to the dump or the macerator toilet as in upflow toilets. The upflow toilet send solids all ground up in a slurry so there is no need to put ice cubes in the black tank to loosen or bust them up. You can't anyway. An upflow macerating toilet has a trap just like a home toilet and in mine the black tank is several feet remote from the toilet. Ice cubes are meant to go directly dumped in a gravity toilet black tank below the toilet. Then you drive first before dumping whether with a 3" gravity slinky or a 1-1/2" hose and macerator. Most likely driving all day to be effective the ice cubes would have melted anyway. And anyway, I think it is an old wive's tale to put ice cubes in a black tank. They are not going to break down solids and if you are diligent after dumping you should put water in your black tank and put in chemicals to break down solids and for odor control if you want.

I don't think a macerating upflow toilet needs chemicals anymore than your home sewer.
__________________

__________________
Davydd
2021 Advanced RV 144 custom Sprinter
2015 Advanced RV Extended body Sprinter
2011 Great West Van Legend Sprinter
2005 Pleasure-way Plateau TS Sprinter
Davydd is offline   Reply With Quote
Reply

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 11:49 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
×