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05-30-2016, 04:42 AM
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#1
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Established Member
Join Date: May 2016
Location: Bayfield
Posts: 13
M.O.C. #18660
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Black tank flush problem
The flushing system on our 2010 RK3000 has stopped accepting water. I inspected the one way check valve that's conveniently located in the wall behind the shower, it's ok. So, I think the sprayer in the tank is blocked. Has anyone ever cleared one successfully? or should I just bite the bullet and drop the tank.
Thanks in advance for any help.
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05-30-2016, 04:47 AM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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You are probably right, but I don't think there is anyway to check that little worthless valve short of removing it. Many of us took them out, in my case while the rig was still under warranty, and use an external backflow preventer.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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05-30-2016, 06:27 AM
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#3
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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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I think there is room on the front of the tank to remove the offending rinse head and clean or replace. At least that is the case on my unit. John
__________________
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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05-30-2016, 10:56 AM
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#4
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Montana Fan
Join Date: Mar 2011
Location: gresham
Posts: 489
M.O.C. #11202
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I had it happen once. I put about two cups of powdered laundry detergent (pre-dissolved in water), and a cup of bleach down the toilet, and filled the black tank through the toilet until I could see the water level up to the open toilet ball valve. Let it set that way for about a week, then drained the tank, and the sprayer has worked fine ever since.
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05-30-2016, 12:04 PM
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#5
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Montana Master
Join Date: Mar 2013
Location: Hanover
Posts: 1,473
M.O.C. #13325
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At least once a year I fill the black tank about 1/3 full and put a cup of dish-washing machine detergent before leaving on at least a trip when we'll be stopping at a full hookup CG. Drain it all out after hooking up, add toilet chem & water, and use. This has worked fine for me.
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05-30-2016, 01:29 PM
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#6
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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Don't drop the tank. Several external back flush connectors available from Amazon or any rev parts source, using a hose to back flush. Connect between the hose and the tank outlet and work great, better in my opinion than the OEM flush.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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10-22-2017, 09:14 PM
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#7
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Established Member
Join Date: Jul 2017
Location: CO Western Slope
Posts: 42
M.O.C. #20169
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Black Tank flush
Question - the black tank flush only has a spray head into the tank and not a separate spray at the valve, correct?
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John & Lisa
2008 F450 | 6.4 PS | full delete | FASS system
2nd Montana - 2018 3811MS
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10-22-2017, 11:26 PM
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#8
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,774
M.O.C. #12947
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The spray head is located at the opposite end of the black tank from where the drain valve is located. This is where ours is located:
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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10-23-2017, 07:48 AM
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#9
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Montana Master
Join Date: Oct 2015
Location: westminster md
Posts: 2,328
M.O.C. #17894
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If I was you I would open up the area to all the plumbing in the basement and find the 2 pipes that go to that valve and cut them off them use sharkbite fittings to connect them together thus eliminating the valve.
Next get a blow out fitting that screws into the flush port and try to add compressed air to dislodge the debris in the spray head. I would not put more that 40-50 psi in. See if you can get some water in ahead of the air to flush it out.
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