Black Tanks Wonโt Flush
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โNov-22-2020 10:47 AM
2018 Bighorn 3870FB
2007 Dodge Ram 2500 CTD 5.9
Prodigy 2
Auto-Slide Hitch
Firestone Air-Bags
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โNov-24-2020 06:41 AM
The flush nozzle now has its discharge aimed in such a fashion that it causes a circular flow in the tank. It really flows a lot of water now.
2003 GM 2500HD, crew cab, SB, 8.1, Allison
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โNov-24-2020 06:21 AM
Following the title you are trying to rinse out your black tank(s).
Your post says you have two unmarked connections. I'm guessing for water hose hook-up to rinse the tank(s).
This is the hard part because every brand, model, year of trailer can be different. In my wet bay there are 3 places to hook up a water hose. A city water connection that goes straight into the water lines. An onboard water tank hook-up that fills my onboard fresh water tank. And a black tank flush hook-up.
My guess is that the one you are hooking up to that is not then running out of your black tank is filling your onboard fresh water tank.
2022 Montana Legacy 3931FB
Pull-Rite Super Glide 4500
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โNov-24-2020 05:31 AM
If you just drain them there is the cause of the problem...unless the valves are bad. They don't cost much and are easily changed but not a job i want with tanks backed up. If you determine the valves work and you have some capacity left in the black tank, pour a bottle of water softener in and good amount of detergent then ice, at least 20 lbs, if you can. Have it already hoked up and drive it on the roughest rad you can find for a couple hours. See if that helps. If not, perhaps, since I haven't tried it a snake up the outlet with the valves open of course..with a painters suit on or some such but don't be too aggressive you don't want to damage the valve seals or valve,I don't like this idea a lot, for obvious reasons but....
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โNov-24-2020 02:18 AM
One grey is bath, the other is kitchen.
Looking at the 5er specs you might want to find a scale so that you know what you are dealing with truck spec wise.
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โNov-24-2020 12:12 AM
I think there is confusion , I think he has the , 1 grey. 1 black, grey water tanks don't normally get a rinse sprayer installed in a grey tank
But I Can Not understand it for you !
....
Connected using T-Mobile Home internet and Visible Phone service
1997 F53 Bounder 36s
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โNov-23-2020 08:22 PM
2003 GM 2500HD, crew cab, SB, 8.1, Allison
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โNov-23-2020 05:34 PM
Drain down the one hose,
One 3inch pipe and valve for the black tank,
And a smaller valve and pipe for the grey tank 1&3/4 inch pipe I think !
Personally my RVs have never had a grey tank rinse, I have only had black tank sprayer rinse,
And this RV does not have any at all, I end up flushing lots of clean water down the toilet to rinse the black tank, does not clean the tank sensors, No bathroom window and I don't like dragging a water hose thru the RV to use a spray wand down the toilet,
Two black tanks will have two 3 inch slide gate valves on 3 inch pipes,
Look at the valves , handles, and pipes
One large and one smaller is normal
But I Can Not understand it for you !
....
Connected using T-Mobile Home internet and Visible Phone service
1997 F53 Bounder 36s
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โNov-23-2020 11:53 AM
Have you properly identified all available connections such as fresh water fill, city hookup and black tank flush ?
Sorry for sounding elementary but not quite wrapping my head around this scenario your experiencing.
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โNov-23-2020 10:11 AM
Specs for 2018 Heartland - Bighorn
Floorplan: BH 3870 FB
(Fifth Wheel)
Holding Tanks
Number Of Fresh Water Holding Tanks1
Total Fresh Water Tank Capacity 65.0 gal.
Number Of Gray Water Holding Tanks1
Total Gray Water Tank Capacity 90.0 gal.
Number Of Black Water Holding Tanks1
Total Black Water Tank Capacity 45.0 gal.
2009 Dodge Ram 2500 6.7l Cummins G56
2020 Rockwood Ultra Lite 2912BS
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โNov-23-2020 09:02 AM
Jeff - 2023 FR Sunseeker 2400B MBS
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โNov-23-2020 08:33 AM
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โNov-22-2020 03:54 PM
normal outlet... sort of a safety situation. Just a thought.
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โNov-22-2020 10:58 AM