Black tank drain

[Rhyno]

Hello. We have a 2021 316rls 5th wheel. We live in our rig full time. About every 2 or 3 tank dumps it is very difficult to get the drain pulled. I have tried valve lube.
And it is just at the start of the drain pull.
Any ideas?
Thanks

[dutchmensport]

I think that may be a common experience. Mine usually stick hard initially too. I have found that if I give the pull handle a hard "push" first, before "pulling" it helps break the glue sticking experience.

Sometimes, they initially pull so hard, I can only pull them slightly. Then I push them (hard) closed again, and do another pull. Usually the second "pull" will let me pull them all the way open.

I figure, it's just "stuff" hardening to the inside of the valve slide that causes this to happen.

[Rhyno]

Originally Posted by dutchmensport

I think that may be a common experience. Mine usually stick hard initially too. I have found that if I give the pull handle a hard "push" first, before "pulling" it helps break the glue sticking experience.

Sometimes, they initially pull so hard, I can only pull them slightly. Then I push them (hard) closed again, and do another pull. Usually the second "pull" will let me pull them all the way open.

I figure, it's just "stuff" hardening to the inside of the valve slide that causes this to happen.

The valve lube does seem to help. I end up doing what you suggested. I guess the cable is so long you don't get a solid pull.

[cougar23]

These cables are indeed long. Factory makes no effort for cables to have a straight pull, they are simply wound around until the end comes to the valve.
I opened my underbelly and secured a piece of 2x4 wood to fasten the cable to so it would not flex as much when pulled. This was done about 6 inches in front of the valve.