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10-23-2016, 04:16 AM
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#1
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Junior Member
Brand: Still Looking
State: Louisiana
Posts: 3
THOR #3181
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Black tank woes
I've got a big issue with my 2016 Four Winds 31W. Solids seem to fall straight out of the toilet into the holding tank, causing a major blockage on a regular basis (every third day or so). The problem seems to be with the shape of the holding tank that is installed level but which has a small well on the discharge end. Liquids seem to head to the well. It seems intuitive there should be a 90 degree elbow to deflect waste flowing from the toilet to the tank, but there isn't anything. We use a lot of water when we flush, but this happens TOO regularly!
Anyone have any ideas?
Thanks
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10-23-2016, 07:09 AM
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#2
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Member
Brand: Thor Motor Coach
Model: Challenger 36TL
State: Georgia
Posts: 92
THOR #5536
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You are running water into the tank for a while before you use the toilet? Correct? I normally hold down the foot pedal for a while to get a minimum of 5 gallons if not 10 before we even start using the toilet. Hoping your issue is that simple..
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2016 Challenger 36TL
2005 Jeep Wrangler Life Raft
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10-23-2016, 11:26 AM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: hurricane 32n
State: Florida
Posts: 799
THOR #4158
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I always use a lot of water and never have an issue. I dump more frequent, but system works great.
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Jerry and Debbie
2015. Hurricane 32N /Kia Soul toad
Retired
Crawfordville Fl. Vietnam Vet.
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10-23-2016, 02:10 PM
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#4
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Senior Member
Brand: Thor Motor Coach
Model: 37GT
State: Florida
Posts: 809
THOR #5246
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Our past 5th wheels were plumbed the same way, just a straight discharge right down into the black tank.
After dumping the black tank I back flush it several times until it runs clear. Then I go inside and put a little "smell good" into the toilet. I hold the flush pedal down and like oldgold said I run about 5 gallons into the black tank to start the week.
Each toilet use I start by barely pushing down the pedal thereby putting 3 or 4 inches of additional fresh water into the bowl. Do your thing and then hold the pedal down to flush with another 1/2 gallon or so. Then I hold the pedal barely down again to make sure there is at least an inch or two of water standing in the bowl.
We use Scott's RV butt wipe (Walmart) and tons of water. Never had an issue.
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Full Time in 2017 Newmar Ventana 4369
pulling a 24' enclosed (Mini Cooper/Harley/Kayak)
(traded 2014 Thor Challenger)
US Army 70-73 Retired LEO
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10-23-2016, 09:12 PM
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#5
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Member
Brand: Thor Motor Coach
Model: A.C.E. 29.2
State: Tennessee
Posts: 46
THOR #3487
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Black Tank
Eat more fruit !
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10-24-2016, 12:50 AM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 28A Class C
State: Vermont
Posts: 267
THOR #4117
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After I dump, I put 3 gallons of water in the black tank, 3 toilet bowls full. If I am going to use the toilet for solids I put a few inches of water in the bowl, mostly to prevent skid marks in the bowl., but I add only a minimum of water when I flush.
Every few dumps use my Tornado flusher to clean out the tank.
It works for me.
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10-24-2016, 05:25 AM
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#7
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Junior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: California
Posts: 28
THOR #5361
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I have a FW 31W and so far have not had an issue. But we do hold a few gallons of water in the tank keeping the tank area under the toilet wet so everything flows down hill the tank does have a slight fall in it but requires RV to be level. If there was a 90 degree elbow you would have a much worst problem. Keepin it wet is the key.
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10-24-2016, 12:22 PM
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#8
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Senior Member
Brand: Thor Motor Coach
Model: 37GT
State: Florida
Posts: 809
THOR #5246
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Quote:
Originally Posted by Brown Ace
Eat more fruit !
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Or you could go that route....
__________________
Full Time in 2017 Newmar Ventana 4369
pulling a 24' enclosed (Mini Cooper/Harley/Kayak)
(traded 2014 Thor Challenger)
US Army 70-73 Retired LEO
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10-24-2016, 01:13 PM
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#9
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 32A
State: Florida
Posts: 1,873
THOR #2829
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As several had said - liquid makes all the difference...
Just reading the frequency of your issue (every 3 days) - are you leaving the black tank valve open while hooked to sewer?
Only way I can picture the problem you are having at that frequency...
The BLACK valve should be CLOSED normally - water in the tank to start with, add your choice of chemicals/additives... and use it... (more use = more liquid and more time for chemicals/additives to do their thing...)
I typically leave the GRAY valve OPEN until a day or so before I dump the black - closing it then and allowing it to collect some water.
Dump the black... use tank rinser if you have one... dump the gray to rinse the hose... and start over (more water... chemicals/additive... etc)
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Greg
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)
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10-24-2016, 02:05 PM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: Challenger 37KT
State: Michigan
Posts: 282
THOR #2628
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Lots of water each time you flush, also in between try filling black tank 1/3 way with water and Dawn dish soap. It will clean your black tank.
KC
__________________
2015 Challenger 37KT
Progressive Industry EMS-HW50C, Winegard Trav'ler Sat dish, Magnashades, 5 star tuner, lots of indirect lighting.
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10-24-2016, 06:19 PM
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#11
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Junior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: California
Posts: 28
THOR #5361
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KCook does that work I've thought of doing that, but was afraid there would be some sort of chemical reaction with the holding tank chems.
Bruslymike think of one of those stand up porta potties, you dump into a tank of treated water the solids break down in the water. Our toilet works the same way, unless your on hookups with the valves open then just use lots of water to flush your on hookups so no need to conserve water.
Gee I hope my (CA governor) is not reading
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10-24-2016, 06:30 PM
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#12
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Axis/Vegas Enthusiast
Brand: Thor Motor Coach
Model: Axis 24.4
State: Michigan
Posts: 9,837
THOR #1150
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Quote:
Originally Posted by CSimon
unless your on hookups with the valves open then just use lots of water to flush your on hookups so no need to conserve water.
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Even with full hookups you should always leave the black tank closed (as mentioned above).
I'll leave the grey open but the black is always closed. On an extended stay with full HU when the black tank gets full I simply empty it, close the valve again, and pre-treat the tank with chem's + a gallon or so of water.
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10-24-2016, 06:49 PM
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#13
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Junior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: California
Posts: 28
THOR #5361
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That make's sense
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10-24-2016, 07:25 PM
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#14
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Senior Member
Brand: Thor Motor Coach
Model: Challenger 37KT
State: Michigan
Posts: 282
THOR #2628
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Quote:
Originally Posted by CSimon
KCook does that work I've thought of doing that, but was afraid there would be some sort of chemical reaction with the holding tank chems.
Bruslymike think of one of those stand up porta potties, you dump into a tank of treated water the solids break down in the water. Our toilet works the same way, unless your on hookups with the valves open then just use lots of water to flush your on hookups so no need to conserve water.
Gee I hope my (CA governor) is not reading
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It worked well in our Challenger, now the black tank sensors are working correctly.
KC
__________________
2015 Challenger 37KT
Progressive Industry EMS-HW50C, Winegard Trav'ler Sat dish, Magnashades, 5 star tuner, lots of indirect lighting.
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10-25-2016, 02:22 AM
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#15
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Junior Member
Brand: Still Looking
State: Louisiana
Posts: 3
THOR #3181
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Thanks Everyone!
Thanks for all of the advice. I only open the valve on the black tank when I'm ready to flush and empty it. This unit has a relatively small holding tank, but I'll try to add more water to the flushes.
I appreciate the dietary suggestions too!
Safe travels!
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