Black tank dump valve

[LarryL]

I need to replace my black tank dump valve,have the coroplast underbelly.

My 5th wheel is a 326MKS Cougar,can I cut a hole where the valve is and

tape the piece back,or should I unscrew the coroplast,lot of screws.

That gorilla tape sounds good to me.

[Festus2]

Originally Posted by LarryL

I need to replace my black tank dump valve,have the coroplast underbelly.

My 5th wheel is a 326MKS Cougar,can I cut a hole where the valve is and

tape the piece back,or should I unscrew the coroplast,lot of screws.

That gorilla tape sounds good to me.

You could do both. If you know where the valve is, cutting a 3-sided "flap" might be better than cutting out a square. If you cut out a flap, have the uncut or flap part on the front edge of the RV and use Gorilla tape for the remaining 3 edges.

All of the coroplast does not have to be removed. Again, if you know where the valve is, just remove enough screws so that you have reasonable and working access to the valve. If you are ambitious, take a good look around the entire underbelly area and see "what's there" and where other things are such as holding tanks, other valves, etc. Make a map of where and what you find for future reference.

You might find wires that are just loose and not fastened down properly, bits and pieces of insulation scattered or thrown in there, loose connections, etc.
Not an ideal working environment but if your rig is under cover and the weather is ok........ well, a great time to explore the underbelly!!

[therink]

I cut out a large square 18 x 18 and replaced it with 24 x 24 piece of coroplast that I got from a sign shop. Secured it with 1/2" self tappers and gorilla tape. One-year and still tight.

[mjeronimo]

I just fixed mine 2 weeks ago. It was leaking, so when I took off the cap surprise! There was stuff in the groove. Cleaned reinstall what a pain! You may need more elbow room than you think. I dropped the whole thing, in the long run it's easier. You could also get a new twist on valve from valterra, but I don't know how that would work with your setup. Good luck!