Water in showers drain - 184bh

[bench724]

Hello everyone - we had our maiden voyage and had a blast (Big South Fork - TN). Grey tank filling pretty quickly was only issue - got a couple 7 gal blue tanks so I can drain and run over to dump station easily w/ out moving TT.

Here is my question - noticed a little water I could see in bottom of shower drain after tanks emptied. Saw this initially at dump station after we dumped and was just looking over everything before pulling away. Pulled back home and then to storage place and noticed water still showing when I look down in drain. Is this normal - is that just small amount that may have not drained gathering there? Anyone experience this?

[FPM III]

It's normal- just a little water from the trap.

All RV drains except the toilet have a trap- just like your plumbing at home. If there wasn't a trap, odor would emanate from the drains and you'd soon be finding another place to stay. Because there is no trap on RV toilets (BTW- your home toilet has a trap), the blade serves as the barrier sealing off any odors.

[bench724]

Great - thanks for the info!

[Murphie]

Just to add to the toilet trap comment. After the blade closes, there is a small amount of water that fills an inch or two on top of the closed blade. This further reduces any odor from the holding tank.