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02-01-2023, 06:02 PM
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#1
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Member
Join Date: May 2006
Location: Colorado
Posts: 66
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Black tank valve problem
Our black tank is FULL & won't drain.
My husband thinks that the rod that goes into the valve has detached from the drain plate. So the rod goes back & forth but the valve doesn't seem to be opening.
Is there another way to get the black tank drain valve to open??
ANY ideas to solve this problem will be much appreciated!
We have a 2009 Mobile Suites 38RSSB3.
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02-01-2023, 06:40 PM
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#2
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Senior Member
Join Date: Oct 2017
Location: Germantown, Tennessee
Posts: 716
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He will probably have to drop the coroplast, cut a hole in it instead, or possibly reach the valve through the sliding doors in the basement. If he cuts the coroplast, just cut a three sided flap bog enough to do the work and seal it back with black Gorilla tape.
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Jim and DW 50 years Brenda
2018 40rssa and 2021 Jayco Eagle 40'
2019 F450, ruby red
Harley Road King & sidecar
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02-02-2023, 05:52 AM
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#3
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Member
Join Date: May 2006
Location: Colorado
Posts: 66
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thank you!
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02-02-2023, 08:59 AM
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#4
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Senior Member
Join Date: Jun 2009
Posts: 457
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Look behind the gray doors first, look for the the inside part of the T-handle.
Look to see if the cable jacket is attached to the handle parts. Operate the handle in and out, look to see what is moving. You may also be able to see where the cable travels to the valve. A common problem is the cable jacket breaking free of the handle, frequently that can be fixed with minimal effort.
Try and take a picture of what you see.
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Thanks,
Duane
2019 DRV MS 39DBRS3 ---> Flexible Flyer
2020 F-450
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02-02-2023, 12:52 PM
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#5
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Member
Join Date: May 2006
Location: Colorado
Posts: 66
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Thank you so much!
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02-03-2023, 09:47 AM
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#6
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Senior Member
Join Date: Feb 2013
Location: on the road
Posts: 1,188
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Most likely the valve is opening and you are just compacted. With the valve open and a drain attachment that has a hose connection and cap it attach a hose and reverse blast the blockage.
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2015 RAM LongHorn Dually Air ride Aisin 4:10's
2016 MS 39TKSB3 "Highly Elited"
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02-04-2023, 10:52 AM
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#7
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Member
Join Date: May 2006
Location: Colorado
Posts: 66
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thank you!
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02-06-2023, 06:21 PM
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#8
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Member
Join Date: Nov 2020
Posts: 67
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DRV dump valves
When I spoke with DRV because my grey water does not close. The DRV tech support said removing the boot around discharge pipe in underbelly will put you very close to where cables attach to dump valve to make any adjustment or repair.
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02-06-2023, 06:44 PM
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#9
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Senior Member
Join Date: Feb 2013
Location: on the road
Posts: 1,188
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Get rid of the cables!!! 6 years full-time and they open and close like new.
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2015 RAM LongHorn Dually Air ride Aisin 4:10's
2016 MS 39TKSB3 "Highly Elited"
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02-13-2023, 10:27 PM
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#10
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Member
Join Date: May 2020
Posts: 37
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Quote:
Originally Posted by Notanlines
He will probably have to drop the coroplast, cut a hole in it instead, or possibly reach the valve through the sliding doors in the basement. If he cuts the coroplast, just cut a three sided flap bog enough to do the work and seal it back with black Gorilla tape.
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If you cut the coroplast you want it hinged to the front, I found Tyvek tape sticks and holds better that Duct or Gorilla. Tyvek is used in home construction and Home Depot & Lowe carry it, likely other lumber yards also.
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04-17-2023, 03:50 PM
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#11
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Junior Member
Join Date: Feb 2009
Location: Deming NM
Posts: 11
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Blocked gate valve
Quote:
Originally Posted by louwho99
Our black tank is FULL & won't drain.
My husband thinks that the rod that goes into the valve has detached from the drain plate. So the rod goes back & forth but the valve doesn't seem to be opening.
Is there another way to get the black tank drain valve to open??
ANY ideas to solve this problem will be much appreciated!
We have a 2009 Mobile Suites 38RSSB3.
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You know something I had that problem not emptying with our last 5er and what I found was the slug where the hole drilled was cut out was floating around the tank and stopped water out, back flushing fixed it until I could drop the belly. I don't know if may have the same thing.
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Chevy 2015 LTZ3500 C/C. L/B. DRW.
Landmark Arlington 365 2017 Silver.
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