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Open Roads Forum  >  Tech Issues  > Black Tanks Won’t Flush Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  |  Oldest first Newest first  Page of 2   Next ENG2242 • View posts Missouri. Senior Member Joined: 05/14/2003 View Profile Offline Posted: 11/22/20 12:47pm Link  |  Quote  |  Print  |  Notify Moderator I have two black tanks that discharge out one outlet. I have two unmarked black tank connections in the water compartment. Connecting to one, no water flows, when connected to the other, water discharges out the other. I tried a Y connection with no luck. I checked the only one way valve in the shower and it appears to be plumbed correctly. I cannot find another. Any suggestions?? Thanks David David Hartmann 2018 Bighorn 3870FB 2007 Dodge Ram 2500 CTD 5.9 Prodigy 2 Auto-Slide Hitch Firestone Air-Bags alisonsawyer • View posts California, USA New Member Joined: 11/22/2020 View Profile Offline Posted: 11/22/20 12:58pm Link  |  Quote  |  Print  |  Notify Moderator Using a pressure washer or power washer.***Link Removed*** LadyRVer • View posts Florida Senior Member Joined: 09/04/2007 View Profile Offline Posted: 11/22/20 05:54pm Link  |  Quote  |  Print  |  Notify Moderator Could there be another slide valve located somewhere underneath? I had motorhome which had shut-off slide valve which had to be opened before it would come out the normal outlet... sort of a safety situation. Just a thought. ppine • View posts Northern Nevada Senior Member Joined: 07/04/2016 View Profile Offline Posted: 11/23/20 10:33am Link  |  Quote  |  Print  |  Notify Moderator Add two bags of ice. Drive for awhile, then empty your tanks. way2roll • View posts Wilmington NC Senior Member Joined: 10/05/2018 View Profile Offline Posted: 11/23/20 11:02am Link  |  Quote  |  Print  |  Notify Moderator Trying to understand your issue. Is it that you have 2 black tanks and one drains while the other doesn't? What's a "one way shower valve"? How long have you had this Rv and did it work before? If the 2 connections in the wet bay are unmarked, how do you know they are for the black tanks? And if you have 2 blacks into one outlet, then how do you have 2 black tank outlets in the wet bay? Sorry for all the questions but I am really confused about the issue you are having. 2020 F350 STX 6.7L Turbo Diesel 2020 FR Cedar Creek Silverback 29rw jwoods61us • View posts INDY Full Member Joined: 04/06/2006 View Profile Offline Posted: 11/23/20 12:11pm Link  |  Quote  |  Print  |  Notify Moderator According to the Google you only have one black and one gray tank. 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. John, Lorie, Franklin, Sammi, Tina 2009 Dodge Ram 2500 6.7l Cummins G56 2020 Rockwood Ultra Lite 2912BS kellem • View posts Shenandoah valley,VA Senior Member Joined: 05/07/2007 View Profile Offline Posted: 11/23/20 01:53pm Link  |  Quote  |  Print  |  Notify Moderator I'm betting you have a grey and black discharging together. 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. MrWizard • View posts Traveling Moderator Joined: 06/27/2004 View Profile Posted: 11/23/20 07:34pm Link  |  Quote  |  Print  |  Notify Moderator Gray tank and black dump to the same outlet 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 Radiate The Happy .... Connected using Verizon and AT&T 1997 F53 Bounder 36s frankwp • View posts Calgary, AB, Canada Senior Member Joined: 09/07/2004 View Profile Offline Posted: 11/23/20 10:22pm Link  |  Quote  |  Print  |  Notify Moderator Perhaps the OP could better explain the problem, because it's about as clear as black water I can't tell if its the drain connections or sani-flush or what. 2010 Cruiser CF30QB 2003 GM 2500HD, crew cab, SB, 8.1, Allison MrWizard • View posts Traveling Moderator Joined: 06/27/2004 View Profile Posted: 11/24/20 02:12am Link  |  Quote  |  Print  |  Notify Moderator I think he is saying he has 2 black tanks and only one will rinse from the installed sprayer 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 Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  |  Oldest first Newest first  Page of 2   Next Open Roads Forum  >  Tech Issues  > Black Tanks Won’t Flush

Search:   Advanced Search Search only in Tech Issues

Jump to Forum Dear Marcus  - Good Sam Roadside Assistance  - Good Sam Club  - Good Sam Insurance  - Camping World Accessories  - Camping World RV Sales  - Good Sam Extended Service Plan  - Camping World Service and Inst...  - Coast to Coast Recreational Vehicles  - Class A Motorhomes  - Class B - Camping Van Conversi...  - Class C Motorhomes  - Fifth-Wheels  - Folding Trailers  - Hybrid Travel Trailers  - Travel Trailers  - Truck Campers  - Toy Haulers Camping  - Tent Camping  - Family Camping  - Workamping Forum General Forums  - Beginning RVing  - Rallies, Shows and Gatherings  - General RVing Issues  - RV Lifestyle  - Full-time RVing  - Camp Cooks and Connoisseurs  - RVing with Disabilities and Ge...  - RV Pet Stop Technical Resources  - Tech Issues  - Do It Yourself Modifications a...  - Towing  - Tow Vehicles  - Dinghy Towing  - Technology Corner  - Forum Posting Help and Support Locations  - RV Parks, Campgrounds and Attr...  - Roads and Routes  - Public Lands, Boondocking and ...  - RVing in Canada and Alaska  - RVing in Mexico and South Amer...  - Snowbirds Other Discussions  - Around the Campfire

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