Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Fleetwood Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 04-03-2020, 08:28 PM   #1
Member
 
Monaco Owners Club
Join Date: Dec 2015
Location: Riverside, CA
Posts: 63
Black Tank Says FULL When It's Not And It Isn't From Dirty Sensors

We have a 40-gallon black tank and we have occasionally had sensor issues, but this seems much different than the usual problem. The tank acts like it has shrunk in size. We had the tank professionally pressure washed thinking there must be a ton of build-up in the tank for it to get full so quick. It turned out the tanks were already relatively clean. I decided to use a meter on the hose to fill it and measure how much water it was actually holding. It registers 1/3 full with 8.5 gallons added, 2/3 with 15 gallons, Full with 20 gallons added, and with 24 gallons added, the red light on the VacuFlush indicator in the bathroom came on (indicating the flushing system is disabled). I stopped filling at this point because I didn't want to risk running water through the VacuFlush pump the wrong way. One other thing we've noticed was that the first time we could get 1 or 2 flushes after the tank showed it was full. After we dumped, we could get 3 or 4 more flushes the second time. The third time after we dumped, we could get 6-8 flushes between the time the tank showed full and the red light on the VacuFlush came on and disabled the flushing system.

We are suspecting it is something having to do with the black tank sensors and the VacuFlush generator shut down relay sensors (red light in the bathroom) and/or some of the wiring, but we are not sure where to begin looking at that.

Anyone have any ideas?
__________________
Dan and Cathi
2016 Monaco Diplomat 43SF
dano50 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-04-2020, 10:08 AM   #2
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 25,180
Do you also have a gravity flush toilet in another bathroom? How is it acting?


It would take one heck of a "poop pyramid" to cut capacity by 15+ gallons, so it seems almost sure it is a sensor problem. I've attached a link to the Vacuflush installation manual so you can review how it determines the tank is full. It does NOT seem to rely on the coach tank sensors.


https://www.leesan.com/uploaded_file...structions.pdf
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
Gary RVRoamer is offline   Reply With Quote
Old 04-04-2020, 10:57 AM   #3
Senior Member
 
Redapple's Avatar
 
Join Date: May 2006
Location: SoCal
Posts: 1,124
Are you sure it is 40 gallon capacity? As previously stated reduction in capacity by 50% seems a bit out of range. Just my 2 cents.
__________________
2020 Grand Design Reflection 315RLTS
2019 GMC Sierra Denali Duramax
Redapple is offline   Reply With Quote
Old 04-04-2020, 01:22 PM   #4
Member
 
Monaco Owners Club
Join Date: Dec 2015
Location: Riverside, CA
Posts: 63
Quote:
Originally Posted by Redapple View Post
Are you sure it is 40 gallon capacity? As previously stated reduction in capacity by 50% seems a bit out of range. Just my 2 cents.
We bought it new and 40 gallon capacity is what the brochure advertised. I have never had a reason to doubt that. We have lived in it full time for 4+ years and have a pretty good idea of how long we can go between dumps and when we are having sensor issues. It is showing full and the VacuFlush disables flushing capability much faster (4-5 days vs 7-14 days) than it ever has before and there are just two of us.
__________________
Dan and Cathi
2016 Monaco Diplomat 43SF
dano50 is offline   Reply With Quote
Old 04-04-2020, 01:28 PM   #5
Member
 
Monaco Owners Club
Join Date: Dec 2015
Location: Riverside, CA
Posts: 63
Quote:
Originally Posted by Gary RVRoamer View Post
Do you also have a gravity flush toilet in another bathroom? How is it acting?


It would take one heck of a "poop pyramid" to cut capacity by 15+ gallons, so it seems almost sure it is a sensor problem. I've attached a link to the Vacuflush installation manual so you can review how it determines the tank is full. It does NOT seem to rely on the coach tank sensors.


https://www.leesan.com/uploaded_file...structions.pdf
Both of the toilets are VacuFlush and share the same pump/holding tank.

Thank you for the link. It was informative.
__________________
Dan and Cathi
2016 Monaco Diplomat 43SF
dano50 is offline   Reply With Quote
Old 04-04-2020, 01:42 PM   #6
Senior Member
 
Join Date: Jul 2015
Location: Watertown NY USA
Posts: 5,143
Quote:
Originally Posted by Gary RVRoamer View Post
Do you also have a gravity flush toilet in another bathroom? How is it acting?


It would take one heck of a "poop pyramid" to cut capacity by 15+ gallons, so it seems almost sure it is a sensor problem. I've attached a link to the Vacuflush installation manual so you can review how it determines the tank is full. It does NOT seem to rely on the coach tank sensors.


https://www.leesan.com/uploaded_file...structions.pdf
It would take one heck of a poop pyramid but that is definitely what it sounds like.
Op, how often do you fill and drain your tanks?
Lynn
__________________
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
LETMGROW is offline   Reply With Quote
Old 04-04-2020, 01:51 PM   #7
Member
 
Monaco Owners Club
Join Date: Dec 2015
Location: Riverside, CA
Posts: 63
Quote:
Originally Posted by LETMGROW View Post
It would take one heck of a poop pyramid but that is definitely what it sounds like.
Op, how often do you fill and drain your tanks?
Lynn
Living in the rig full-time, we have been dumping our tanks pretty much every 7-14 days for 4+ years. Normally we need to dump because the gray tank (60 gallons) gets full first. We don't remember ever having to dump because the black tank was full first or after only 4 or 5 days.
__________________
Dan and Cathi
2016 Monaco Diplomat 43SF
dano50 is offline   Reply With Quote
Old 04-04-2020, 05:41 PM   #8
Senior Member
 
Join Date: Jul 2015
Location: Watertown NY USA
Posts: 5,143
I would try filling the black tank with water and dumping it several times to see if the capacity changes. An interval of 7-10 days might allow solids to become stuck together and form a build up.
You are full time. Are you staying in one spot or do you move on occasion?
Lynn
__________________
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
LETMGROW is offline   Reply With Quote
Old 04-04-2020, 05:54 PM   #9
Senior Member
 
450Donn's Avatar
 
Join Date: Jun 2006
Location: Dallas,OR
Posts: 4,584
Go buy one of those 6 foot bore scopes that is powered by a smart phone. Open the toilet and with the water turned off stick the camera down and look at the tank. Like others have said I would bet on a poo pile. No guesses that way
__________________
Don and Lorri
Resident Dummy.
450Donn is offline   Reply With Quote
Old 04-04-2020, 06:41 PM   #10
Member
 
Monaco Owners Club
Join Date: Dec 2015
Location: Riverside, CA
Posts: 63
Quote:
Originally Posted by LETMGROW View Post
I would try filling the black tank with water and dumping it several times to see if the capacity changes. An interval of 7-10 days might allow solids to become stuck together and form a build up.
You are full time. Are you staying in one spot or do you move on occasion?
Lynn
This has been going on for about 2 weeks. We have dumped 3 times during that time. We have filled it with Dawn and detergent water and went for an hour long drive and came back and dumped. We have filled it with clean water 4 other times and drained it. The water always comes out clean. This is all besides the professional power washing that was done 2 days ago. The water came out almost clean then. We do a good job of rinsing every time we dump, so a large build up was really unlikely, but we had it power washed anyway. Prior to that we had it power washed a year ago. That was the first time we had done it since it was new 3+ years prior and then it was only to get the sensors cleaned and working properly. They did not find a build up then and the sensors have worked well since then.

We are not stationary. We move around frequently. We are currently at an E/W only space with a dump station available and plan to be here until this stay-at-home order is over. Closing up everything to dump every 5 days is just getting old.
__________________
Dan and Cathi
2016 Monaco Diplomat 43SF
dano50 is offline   Reply With Quote
Old 04-04-2020, 06:55 PM   #11
Member
 
Monaco Owners Club
Join Date: Dec 2015
Location: Riverside, CA
Posts: 63
Quote:
Originally Posted by 450Donn View Post
Go buy one of those 6 foot bore scopes that is powered by a smart phone. Open the toilet and with the water turned off stick the camera down and look at the tank. Like others have said I would bet on a poo pile. No guesses that way
With a VacuFlush there is no access to view the tank through the toilet. We have a probing camera that we might try using at the tank exit after we dump and throughly clean it next time. Thanks for the suggestion.
__________________
Dan and Cathi
2016 Monaco Diplomat 43SF
dano50 is offline   Reply With Quote
Old 04-04-2020, 07:06 PM   #12
Registered User
 
jarata's Avatar
 
Newmar Owners Club
Join Date: May 2016
Posts: 809
They never work right try ice in toilet and drive around
jarata is offline   Reply With Quote
Old 04-04-2020, 07:21 PM   #13
Member
 
Monaco Owners Club
Join Date: Dec 2015
Location: Riverside, CA
Posts: 63
Quote:
Originally Posted by jarata View Post
They never work right try ice in toilet and drive around
HA HA NOT a good idea with a VacuFlush! If we put ice cubes in our toilet, we would have A LOT more problems than we do now!
__________________
Dan and Cathi
2016 Monaco Diplomat 43SF
dano50 is offline   Reply With Quote
Old 04-05-2020, 04:25 AM   #14
Senior Member
 
Join Date: Jul 2015
Location: Watertown NY USA
Posts: 5,143
Besides the "Ice trick" is a waste of time and money. It doesn't work.
Lynn
__________________
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
LETMGROW is offline   Reply With Quote
Reply

Tags
tank, black tank



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
Black and Gray tank sensors not working bepar108 Tiffin Owner's Forum 2 07-21-2018 09:38 AM
Temperature Sensors/Tank Sensors bcruzen Alpine Coach Owner's Forum 7 08-29-2017 11:56 AM
New-to-us 5er, sensors say black tank is full... scottandanna iRV2.com General Discussion 35 07-17-2017 07:27 PM
Black tank sensors not recording bill cody Entegra Owner's Forum 1 11-08-2016 02:31 PM
Monaco Says It Isn't Their Problem . . . Las Vegas Rambler Monaco Owner's Forum 34 10-10-2008 12:23 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 09:38 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.