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02-12-2023, 03:42 PM
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#1
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New Member
Join Date: Jan 2023
Location: Wirtz
Posts: 4
M.O.C. #32233
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Tank Flush
I have a Montana HC 295 RL. There's a port in the convenience center called Tank Flush. Is this port for the black tank? Also, there is a warning label above the port that says "do not use the tank flush valve unless the fullway termination valve is in the open position". What is "the fullway termination valve"? Thanks
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02-12-2023, 03:56 PM
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#2
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,400
M.O.C. #4831
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Yup, the Tank Flush is for the black tank. The fancy wording is advising you not to try and flush while the gate valve for the black tank is closed. There are many occurrence here is folks "forgetting" they had the flusher going with the valve closed until it erupts over the roof.
That said, many of us run the flusher with the gate closed to add water to the tank to increase the hydraulic effect when you open the valve. Personally, I run about 8 minutes at 60 P.S.I. of water before opening the valve. YMMV depending on how full the tank is to begin with.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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02-12-2023, 04:24 PM
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#3
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 2,615
M.O.C. #22835
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Termination valve simply means your black tank slide valve outlet. Where you dump the black tank.
We each do it slightly different. Because my black and bathroom grey tank discharge at the same port (2 valves), I use a Flush King (3rd valve attached) and backflush the grey water into the black, usually 3 times, then when water is available, do a final black tank flush after the 3rd backflush.
And them, sometimes, I'll use the black tank flush (garden hose connected) to add more liquid to the black tank to make the first dump better. Then proceed with my back-flush process.
There are options when using the black tank flush, opposed to running extra water down the toilet, or back-flushing from the grey tank. Each process helps pull more crud out of the black tank.
__________________
History is not about the past, it's an explanation of the present.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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02-12-2023, 04:53 PM
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#4
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,662
M.O.C. #9969
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I do similar to Carl, but gave up on trying to time it because of the different flow rates and pressure encountered in different CGs. I now have an inline Flow Meter, $10 to $15 on Amazon so I know exactly how much water I'm putting in.
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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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02-13-2023, 04:26 AM
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#5
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,150
M.O.C. #25165
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I do same as Michelle and Ann. I also meter the water I put in our fresh tank, so I know I'm only travelling with 10 gallons, not 50.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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02-23-2023, 07:38 AM
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#6
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Montana Fan
Join Date: Sep 2016
Location: Fargo
Posts: 214
M.O.C. #19032
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Flow meter is a great idea... I might have to invest in one.
Right now I either don't walk away (I like to fill some with the flusher like Carl and Susan) or I set a 3 or 4 minute timer my phone.
__________________
2004 Montana 3295RK 2019 Ram / Cummins 2500 Summer season weekend warrior
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02-23-2023, 07:55 AM
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#7
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,150
M.O.C. #25165
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The timer is a really good idea for not forgetting and over filling your tank, but you still really never know how much water you are putting in without a meter.
It could take 2 minutes to fill a 5 gallon bucket or it could take 12 minutes depending upon flow rate.
I also use my meter to add fresh water so that I only travel with about 10-12 gallons. Enough for flushing and washing, but not a lot of additional unnecessary weight.
__________________
Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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02-23-2023, 08:26 AM
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#8
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,266
M.O.C. #30417
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Welcome to the MOC and ya what they said! I like the idea of a flow meter.
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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02-23-2023, 09:04 AM
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#9
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,567
M.O.C. #2283
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I do similar but after I dump I refill the black tank and let it set for a few days or weeks and repeat a time or two.
Lynwood
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02-26-2023, 08:07 AM
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#10
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Seasoned Camper
Join Date: May 2020
Location: Chandler
Posts: 81
M.O.C. #26281
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I also use a flow meter and a clear plastic sewer elbow. With the flow meter, one can fill the tank 90% + and dump it. I flush the tank 3x this way and stop once the water is clear as it exits the tank.
__________________
AZMont
2020 Ram 3500 MegaCab HO Diesel 4x4 SRW
2015 3100 RL, Onan 4500i inverter/generator
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