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11-29-2021, 05:29 AM #11
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Until we purchased our new unit this summer, I never had a camper with the black tank spray valve. I always used the toilet bowl filled a few times to flush out. I did that on our first trip before remembering the sprayer valve. I was really surprised at how much more gunk came out. We have a clear elbow so I left the valve open and it must run about 5 minutes before it's all clear. I could tell when more was coming because the water out the hose would slow or stop until the water in the tank built up enough to push the next "batch" out and down the sewer hose. It was quite enlightening (and disgusting) to realize all those years of flushing the old way in previous campers and motorhomes must have left a lot in the tank that I never realized. Then again, it never hurt me so...
Chad
2023 23LDE 965W Solar, Victron Multiplus, Solar Controllers, Cerbo GX, 4x280AH DIY Lithium Batteries, SeeLevel Tank Monitoring, Shock Absorbers (Replaced 2022 22MLE)
2022 F350 6.7L Superduty, Carbonized Gray, Ultimate Lariat Pkg, 4WD, Crew Cab, 160" Wheelbase, 3.55EL Rear End, 3566# Payload
Adaptive Steering, Ultimate Camera Pkg, 20" Wheels, 397 Amp Dual Alternator, ARE Topper (Replaced 2004 F150)
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11-29-2021, 07:27 AM #12
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I put a clear 45 deg adapter between the RV and the hoses going to the dump. I run the flush until the water gets clean and stays clear. Typically when it gets clear, I'll close the tank valve and let it fill for a minute or so, then open the valve again. There are always a few chunks that come out after that. I'll do that a couple times.
As posted, varying pressures and flow rates will make it almost impossible for you to put X gallons in the tank every time. I guess a bucket in the toilet would be the only true way to properly gauge it for accuracy if you are worried about it too much.2021 Reflection 367BHS
2009 Dodge 3500 4x4 Longbed MegaCab
Electrical Engineer/Musician/Rancher
Habbitial facebook jail inmate and soon to be banned from here
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11-29-2021, 11:47 AM #13
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I use an inexpensive inline flow meter (also helpful to monitor water consumption and/or for filling the fresh water tank. I have 2, I don't use anything dedicated to black tank elsewhere).
Drain black, put back in about 10-15 gallons through the black tank flush valve, drain again, then refill with 5 gallons of water, +blank tank treatment, +about a cup of Pinesol. If the second draining still looks funky and I have time, I'll flush & drain a second time.Colin & Tracy
'21 Chevy Silverado 3500HD LTZ/Z71/SRW, Long bed, Anderson UH
'21 Solitude 310 GK-R
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11-29-2021, 12:32 PM #14
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2021 Reflection 367BHS
2009 Dodge 3500 4x4 Longbed MegaCab
Electrical Engineer/Musician/Rancher
Habbitial facebook jail inmate and soon to be banned from here
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11-29-2021, 12:41 PM #15
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Just the usual powder stuff, don't recall the brand name now, but mix a scoop into the toilet & flush. Same for the Pinesol, just dump it into the commode.
Also, full dump, refill, dump, add 5 gallons, and dump both gray tanks, runs about 15 minutes but a lot of that depends on the flow rate when adding water back in, and if I'm already hooked up to sewer or passing through a dump station, in which case add about 5 more minutes. Also, the Solitudes have massive tanks, so might take longer than other models, I think about 50 gallons each for the 1x black and 2x grey.Last edited by JM0397; 11-29-2021 at 12:51 PM.
Colin & Tracy
'21 Chevy Silverado 3500HD LTZ/Z71/SRW, Long bed, Anderson UH
'21 Solitude 310 GK-R
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11-29-2021, 02:11 PM #16
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I saw this interesting article. Haven't tried the Pinsol/Calgon mix yet, so I cannot attest to it, but bought the stuff to try in FL when I use up our bottle of Thetford...
https://kleentank.com/which-tank-additive-is-best/Chad
2023 23LDE 965W Solar, Victron Multiplus, Solar Controllers, Cerbo GX, 4x280AH DIY Lithium Batteries, SeeLevel Tank Monitoring, Shock Absorbers (Replaced 2022 22MLE)
2022 F350 6.7L Superduty, Carbonized Gray, Ultimate Lariat Pkg, 4WD, Crew Cab, 160" Wheelbase, 3.55EL Rear End, 3566# Payload
Adaptive Steering, Ultimate Camera Pkg, 20" Wheels, 397 Amp Dual Alternator, ARE Topper (Replaced 2004 F150)
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12-01-2021, 02:51 PM #17
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Just a suggestion but it's always a good idea to leave dumping the bathroom grey tank for last. I do the black tank first with a short flush towards the end, close that valve and then next I empty the kitchen tank and let water fill the black tank simultaneously through the flush line.o Once kitchen has drained I close that valve and shut off black tank rinse. Next open black tank drain and do a second rinse and 3rd if needed. After I'm satisfied with the black tank I close that valve and then open the bathroom grey tank and let it fully drain. This helps give a final wash out to the discharge pipe, sewage hoses, and all of my fittings. If I'm traveling directly to another campground with full hookups I'll let the black tank fill for 2-3 minutes while draining the bathroom grey tank.
Last edited by IBEW Sparky; 12-01-2021 at 02:55 PM.
Bill & Colleen ~ Schwenksville, Pa
2019 Reflection 337RLS
2006 GMC Sierra 3500 8.1L V-8
Firestone Ride-Rite Air Bags
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12-01-2021, 03:16 PM #18
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I think I've been overdoing this. I do the same as Sparky but fill black 1/3- 2/3 and keep flushing till the clear 45 adapter shows very few solids and clear water.
2019 Ram Laramie Mega Cab 3500 4x4 HO CTD Aisin DRW, Pullrite 24k Auto Slider, 7500# Airbags
2020 Momentum 328G
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12-01-2021, 03:26 PM #19
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I'm confused... I thought the rule was to never use the black tank flush after closing the valve? I guess a little would be ok, but doesn't it get pressurized?
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12-01-2021, 03:43 PM #20
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- Mar 2020
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- Friendswood TX.
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Phillip
2021 F250 King Ranch 6.7L PS SRW SB CC 4x4 Tremor, 35k inverter, 60gal S&B tank.
2019 312 BHTS, MORyde CRE300, five leaf 6k leafsprings , MORyde heavy duty shackles.
Non Destructive Examiner- Oilfield Trash
Do you consume anything on long...
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