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08-18-2020, 10:36 AM
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#1
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Junior Member
Join Date: May 2020
Posts: 8
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Black and Gray water tank valves
I have a 2015 Dynamax Rev which I purchased used this year.
The push/pull handles for these valves are located in box inside exterior storage compartment and even with lots of lubricant, extremely difficult to open/close.
One or both of these valves will not close completely and as such when I remove end cap to connect dump hose at dump station, there is a very bad mess to clean up.
Any suggestions or best to just bite the bullet and purchase and install new valves and operating cables?
Many thanks in anticipation.
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08-18-2020, 10:50 AM
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#2
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Senior Member
Join Date: Jul 2017
Location: Zephyrhills FL
Posts: 1,108
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If they are already sticking they likely have rust or corrosion of some type in them. SoaK them with penetrating oil. A handy trick I have used on other types of cables is to remove the handle. Put some light weight oil in a balloon, slip the balloon over the end of the cable and secure it with a rubber band or tie wrap. Gently squeeze the balloon to force the oil down the cable. If that doesn’t loosen them up you are probably going to need to replace them.
__________________
(Previous) Coachmen Mirada Select 37RB
(Previous) Coachmen Freedom Express 246RKS
(Current)2022 Grand Design Reflection150 226RK
2022 F150 Powerboost Hybrid.
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08-18-2020, 11:10 AM
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#3
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Senior Member
Join Date: Aug 2011
Location: Albany, GA.
Posts: 1,359
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Being as the handles are located within inside an exterior storage compartment I wonder IF the valve handles are connected to the valves with a cable. On my previous TT they were cable connected and very hard to open or close. When I removed part of the underbelly cover I found that the cable itself was six (6) feet long but the distance from the handles to the valves was only about three (3) feet. I cut the cable so that they were more straight inline between the handles and the valves, removed the valves themselves, took them apart and cleaned them and installed rebuild kits on each one. Once all this was back together the system worked really easy. IF you are thinking about replacing the valves then you will be removing the existing valves. You can buy rebuild kits for each valves, about $6-$8 each, and rebuild them while you have them out, , ,
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08-18-2020, 06:48 PM
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#4
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Junior Member
Join Date: May 2020
Posts: 8
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Tank- black/gray water tank valves.
Doug,
Thanks for your insight.
Will try as suggested, but looks like replacement will be the path of least resistance.
Again thanks for replying.
Alan.
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08-18-2020, 06:51 PM
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#5
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Junior Member
Join Date: May 2020
Posts: 8
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Quote:
Originally Posted by Thurman
Being as the handles are located within inside an exterior storage compartment I wonder IF the valve handles are connected to the valves with a cable. On my previous TT they were cable connected and very hard to open or close. When I removed part of the underbelly cover I found that the cable itself was six (6) feet long but the distance from the handles to the valves was only about three (3) feet. I cut the cable so that they were more straight inline between the handles and the valves, removed the valves themselves, took them apart and cleaned them and installed rebuild kits on each one. Once all this was back together the system worked really easy. IF you are thinking about replacing the valves then you will be removing the existing valves. You can buy rebuild kits for each valves, about $6-$8 each, and rebuild them while you have them out, , ,
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Many thanks.
A lot of learning with these little “beasties”.
I’m on it.
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08-19-2020, 12:51 PM
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#6
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Senior Member
Join Date: Sep 2009
Posts: 191
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Valterra does make a valve that twists on where your waste water hose hooks. That could be your temporary solution.
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08-19-2020, 01:02 PM
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#7
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Junior Member
Join Date: May 2020
Posts: 8
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Quote:
Originally Posted by shadows4
Valterra does make a valve that twists on where your waste water hose hooks. That could be your temporary solution.
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Great idea.
Sincere thanks.
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08-19-2020, 03:01 PM
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#8
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Junior Member
Join Date: May 2020
Posts: 14
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Cables may be to short
Some cables are to short and create a bind in the curves. If you are going to replace everything, consider going with electric valves. Just as easy to install.
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08-19-2020, 04:23 PM
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#10
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Junior Member
Join Date: May 2020
Posts: 8
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Quote:
Originally Posted by Cajunrver
Some cables are to short and create a bind in the curves. If you are going to replace everything, consider going with electric valves. Just as easy to install.
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Many thanks. Another great idea.
I’ll certainly look into this one.
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08-19-2020, 08:32 PM
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#11
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Senior Member
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 9,574
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For a temporary solution, just hold your drain hose beneath the cap, facing upward. When you remove the cap, catch the mess in the hose, then attach the hose and open the valve(s).
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Larry
"Everybody's RV is not like your RV."
"Always take pictures with the button on the right."
"Always bypass the water heater before opening the low-point drains."
Sticks and Bricks: Raleigh, NC
2008 Cherokee 38P: at Ivor, VA permanently
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08-19-2020, 08:47 PM
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#12
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Junior Member
Join Date: May 2020
Posts: 8
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Quote:
Originally Posted by Larry-NC
For a temporary solution, just hold your drain hose beneath the cap, facing upward. When you remove the cap, catch the mess in the hose, then attach the hose and open the valve(s).
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Another great idea. Thanks.
So many smart people out there.
Great to learn from others who have tread through the mess.
Will get there soon.
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08-19-2020, 09:54 PM
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#13
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Senior Member
Join Date: Oct 2016
Location: Indiana
Posts: 163
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I replaced my gray tank valve this morning. It would not close. Once I took it apart I found the factory installer used so much PVC glue that it oozed into the flanges and filled the groove the closure blade slides through. I tried cleaning the glue out, but did not work. A new one works great. Gray water is 1.5", black tank is 3". Mine was the kitchen sink, so not too bad.
__________________
John
2019 Ram 3500 CC 4X4 Cummins 6.7l
2020 Fuzion 369 toy hauler
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08-22-2020, 07:36 PM
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#14
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Senior Member
Join Date: Mar 2013
Posts: 1,485
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Here are YouTube showing how to l’un your valves. I do this when ever they start sticking. Cheap and easy to do.
https://youtu.be/2GDErKY05-8
https://youtu.be/TGv9THpOdmw
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2014 Sunseeker 3170 DSF
Dorothy, Garrette and Miss Bella.
Retired and having fun.
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