First time shower use

BTW, I hope the title in your post means you've taken showers prior to this....:W:W......Dennis

Most likely construction debris

Glad to hear the snake worked.

Make sure the water is going into the tank and drains out the grey tank sewer connection. Run it into a bucket so you can see what caused the blockage.

Went and bought a snake and came back and snaked the drain. At first it didn't seem to do anything then it started to slowly drain. After running it back and forth it seems to be draining faster now. I'm going to give it a few more back and forth and see how that does. It must have been some kind of plastic seal maybe between the tank and the line? I mean it held the water in the shower overnight so it had to be sealed somehow and the snake didn't seem to make contact with anything solid.

Can you get down under the TT and follow the shower drain to the tank? If so, can you see any reason that it would not drain into the grey tank?

Checked both gray tanks and they are empty. I've only ran the water in the sink a few times and they are 35gal tanks.
I removed the drain plate and I can't feel anything. Sigh so now I guess I have to go buy a snake. I called the rv place I bought it at and of course closed on Memorial Day but I thought I would try.
Just irritating as there is supposed to be a PDI where they check all this stuff. I guess the D is for didn't do it well.

or have manufacturing crud in it.

You may have to use a drain snake to clear the drain to the grey tank. As others have said, it may just be a full grey tank.

Assuming your grey tank is empty, remove the drain cover and make sure the packing has been removed....Dennis

DynoDragn wrote:
I used my shower for the first time and it's not draining. Wasn't sure if there is a valve or something that needs to be opened from the factory? It's a brand new TT.

Trailers are built by folks that have no plumbing in their houses.

Did you check if the tank may be full?