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09-17-2021, 06:35 AM
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#1
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Seasoned Camper
Join Date: Mar 2013
Location: Neville
Posts: 85
M.O.C. #13316
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Need understanding of Black tank flush
I think if I know how the black tank flush works I will be able to flush tank more efficient.
Is it jets or a spinner in tank? 1 jet or spinner or multiple? Is it good to put on flush a while before dumping to mix things up? I do have a clear 45 on my discharge so can see when dump is clear.
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09-17-2021, 06:58 AM
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#2
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
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There are several ways to use the rinser. I believe mine has fixed ports since the sound of it is constant. At times I will kink and let go of the hose repeatedly to add action to the spray. I find it most useful to use after the tank has drained. The most effective thing for me is to raise the front of the trailer during the whole process.
__________________
2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, disk brakes. 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
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09-17-2021, 07:47 AM
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#3
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Montana Master
Join Date: Mar 2013
Location: Frostproof, FL USA
Posts: 2,362
M.O.C. #13272
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I have never actually observed the black tank sprayer on a Montana or our current fiver. Years ago I abandoned using the OEM black tank flush and purchased a KingFlush. With the KingFlush I feel like after doing several flushes not only is my tank cleaner but the sewer pipe also gets cleaned out. In addition, I can close off my black gate valve and backflush my gray tank, which really helps keep any odor from there down.
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Previous: 2008 Montana 3400RL & 2014 3725RL
Current: Full Time 2022 SOB TT Toy Hauler
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09-17-2021, 07:52 AM
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#4
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,159
M.O.C. #6433
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I believe the ones installed in the Montanas have multiple holes to form a spray pattern. But no moving parts.
My procedure:
Completely drain black tank
Close black tank drain valve
Turn on water to flush system
Let it run 2-3 minutes
Letting it run, open the black tank drain valve
Look at the clear extension to see what is coming out
Close black tank drain valve
Let flush run 2-3 minutes
Open the drain valve and watch contents
Repeat until I no longer see solids coming out
Water never turns completely clear, but is only faintly brown
Good enough for me for 14 years.
Just do not walk away or get distracted while flush is running and drain valve is closed.
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Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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09-17-2021, 09:12 AM
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#5
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Montana Master
Join Date: Jun 2017
Location: Northern Illinois
Posts: 525
M.O.C. #19994
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Quote:
Originally Posted by BB_TX
I believe the ones installed in the Montanas have multiple holes to form a spray pattern. But no moving parts.
My procedure:
Completely drain black tank
Close black tank drain valve
Turn on water to flush system
Let it run 2-3 minutes
Letting it run, open the black tank drain valve
Look at the clear extension to see what is coming out
Close black tank drain valve
Let flush run 2-3 minutes
Open the drain valve and watch contents
Repeat until I no longer see solids coming out
Water never turns completely clear, but is only faintly brown
Good enough for me for 14 years.
Just do not walk away or get distracted while flush is running and drain valve is closed.
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Ditto, here
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The "Black Pearl"-2017 3731FL Legacy Package
2017 F-450 Platinum, 6.7 PSD
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09-17-2021, 01:37 PM
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#6
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,658
M.O.C. #9969
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I do similar except I quit timing the flush as I installed a flow gauge and will put in 35 to 40 gals at least 3 times and when I'm done the water coming out is as clear as the water going in.
Oh, by the way, when I'm done the Black sensor will read Empty.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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09-17-2021, 02:55 PM
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#7
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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Imagine a plastic fitting with three holes drilled in its face. That is what is installed in the very front of the black tank. Replaced mine when it got plugged after many years of use. I also installed a check valve in place of the pipe nipple keystone used in between the rinse fitting and the pex pipe at the front of the tank. That way once i turn off the rinse water, nothing flows backwards into the rinse fitting which can plug it again in time.
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2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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09-17-2021, 05:27 PM
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#8
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Montana Master
Join Date: Jan 2018
Location: Austin
Posts: 2,413
M.O.C. #21044
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I saw a YouTube video recently - can’t remember the name - but a guy had a nozzle he developed to put on the end of a power wash hose and he would run it up into the black and grey tank thru the hose back flush connection on the clear outlet elbow. It flat cleaned everything out big time!
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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09-17-2021, 07:20 PM
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#9
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,680
M.O.C. #24086
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One thing they mention on the Montana Factory Tour on YouTube, is to raise the front of your rig to get a better flush. I do this when I can and at the end of our road trip to get a better flush. The bathroom grey tank drain s better too.
For the galley grey tank I lower the front down. This tank drains the opposite way.
Experiment with your rig, up, down, left, right.
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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09-18-2021, 04:36 AM
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#10
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,137
M.O.C. #25165
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I do the same as Michelle & Ann. Use an inexpensive hose meter and that way you know exactly how much water you put in the tank. After I'm done, I always put 5-10 gallons of water in and leave it. That way I can start out the next cycle with plenty of water to keep from having the poop pyramid.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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09-18-2021, 07:05 AM
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#11
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Montana Master
Join Date: Aug 2015
Location: SWFL
Posts: 964
M.O.C. #17801
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I believe it's just a fixed spray pattern. I've never used it; I've never had a blockage.
__________________
2016 Montana 3711FL
2005 Ford F350, 6.0 diesel, short bed
Demco Hitchiker Auto Slide hitch
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09-18-2021, 07:56 AM
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#12
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Montana Master
Join Date: Dec 2017
Location: Mountain Home
Posts: 838
M.O.C. #20949
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The OEM black tank sprayer is a joke... Piece of fixed plastic with some holes in it...
The other part in the built in black tank flush that's a joke and WILL flood your Montana is the anti siphon valve that's in line with that
Image of OEM black tank sprayer...
I don't use mine and haven't used any built in sprayer in decades... I use the Valtera King flush and clean out my black and both gray tanks and I dont worry about flooding from a cheap plastic anti siphon valve..
YMMV
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