Is there a better dump valve?

suprz wrote:
I dont think i have seen any dump valve with a different configuration of the seals / blade location or tolerances. The only thing i could suggest to try is to see about getting a new set of seals for the valve from the manufacturer or rv dealership parts dept. to help mitigate the issue. In any case good luck with your search, and dont let folks get to you on here.

Thanks for the input. I did try to point out that the seals are completely out of the picture when the blade is pulled open. With the valve open, there are gaps on each side that let anything flow into the area around the now open blade. I was hoping to find a brand that does a better job of blocking that opening.

Valves that are directly operated may only exhibit somewhat stiffer operation, but will continue to work. Cable operation cannot push a valve closed that has much increase in drag. Folks that do not have cable operated valves should not compare their experience and should not be commenting.

I do understand the problem, having dissected the valve and saw the gunk causing the drag. There is no way to keep any and all material out, with the sewage gushing thru the open valve, a small amount will go into the aforementioned gaps.

I looked at electrically operated valves and might do that next time. The thing that I found is that all the switches are for interior use only and I don't have a convenient place. For now, I have replaced the entire valves on the gray and black tanks.