DSK wrote:

Seahag wrote:

Yes it does, but a trap would ease the bend on the hose and hold a little
water so general smells wouldn't float back up to get'cha!

No, a trap will form a nice environment for more smelly critters. There is no
reason whatever to put a trap on any boat plumbing.

DSK

I think you could make an argument for a trap if you are using a holding tank,
I'd rather have some of the nasty gasses that form in a holding tank choose
to exit the system via an outboard vent than the interior sink drains.

Cheers
Marty