boat plumbing question
 

When I was installing a new sink on the boat, the old one had a "trap" like the one in your house. I hooked the new one to it but kept wondering...why on earth do you put a trap in a boat? There is no "sewer gas" that will make its way to the sink, it drains overboard. Why not just install a drain hose right to the thru hull fitting and be done with it? I noticed it is not draining as fast as I would like and I think the trap is the culprit...I am thinking of ripping all that excess plumbing out and going direct. Any reason not to?

My two sinks dump strait out the side.
Posted from my iPhone/Mobile device

Both mine dump straight out also, maybe your boat was previously owned by a licensed plumber?

The only reason why you could have a trap IMHO would be if your sink empties into the holding tank, then you would want a trap to block the gas/smell

No trap needed. Whomever installed it forget he wasn't working on a house. :)