Originally Posted by tpennington70
I also noticed even after completely draining my bathroom grey water tank there was standing water slightly above my shower drain. How could that be with an empty tank? This was the first time we have ever used it. Hard to believe something is blocking that drain pipe already??
Sounds like that's the water in the "S" Trap. It stays there to keep sewer fumes out of the trailer. There's also standing water in the sink traps - it's just a little more difficult to see. It won't hurt anything to leave it there, since it will be flushed by new incoming water the next time you use the shower/sink faucet.
If you are winterizing, however, you will
want to flush that water from the drains, so it doesn't freeze and damage the pipes. Just pour a couple of cups of the pink anti-freeze in each drain. That will flush out the water, and leave the traps full of anti-freeze to keep the stink out of the trailer. Also, pour a cup or two of the anti-freeze into the toilet bowl. It will keep the casket from drying out during winter storage. Hope that answers your question!