[Hellbilly13]

Thanks for the reply. I did figure out that it's plumbers putty. Plumbing is the area of home/rv repair that I'm weakest in. I now realize what's going on here.

What you are looking at in the pic is more shoddy work from the factory. At least as far as I can tell because the coroplast still had those nail like fasteners. The pipe broke off inside the grey tank and someone put a bunch of plumbers putty on it and put a hose clamp, but there's only about 1/8 of an inch of pipe for the clamp to grab on to so it popped off.

I've been to Home Depot 4 times trying to come up with a better solution without replacing the grey tank. I think a flexible coupling is going to work, but I got the wrong size and I'm headed back for a 5th to grab a bigger one.