overboard drains

Brite Idea

Active Member
Nov 5, 2011
451
Long Island, New York
Boat Info
2010 310 Sundancer
270 Sundancer 2000
Engines
twin 5.0 ECT Bravo III's
twin 4.3 TBI Merecrusier Alpha Gen II counter rotating drives
My boat a 2010 310 Sundancer has all the drains, galley sink, head sink, air conditioner condensate and shower sump all running into the sump. I don't understand why? In the manual it states that these drains had the option to drain overboard but mine do not. Anyone have an idea why they are plumbed this way? I plan on running the galley drain to a thru hull so I don't have to worry about what food scraps get dumped in the sink drain.
 
If everything drains to a sump and then subsequently pumped into your holding tank, then the boat has the "grey water" option. If the sump still pumps overboard, then that's just the way it is. It's a "6 of one, half dozen of the other" kind of thing. Obvioulsy, the low drains have to be pumped to the sump because of their relation to the waterline - the other ones could be done either way and the same model can have it either way. It's often dependent on the year it was built and even at which factory.
 
Some states in the US have lakes with no overboard discharges of any kind. I believe there are lakes in New Hampshire where this is the case. Your boat may have been put into service on such a lake.
 
I'd run all but the shower directly overboard, if it's feasible to do.

Some boat builders route them all to one thru hull, reducing holes in the boat.
 
Last edited:
The sump does pump over board but I guess because the boat was on a lake it was built to have the grey water tank option? The galley sink is what I'm concerned about because of food scraps and such. When I got the boat that drain was slow because it had accumulated lots of stuff that got nasty. I'm going to reroute that one and drain it directly over board. The only drain that's possibly lower than the water line is the shower which has been used once so far.
 
The sump does pump over board but I guess because the boat was on a lake it was built to have the grey water tank option? The galley sink is what I'm concerned about because of food scraps and such. When I got the boat that drain was slow because it had accumulated lots of stuff that got nasty. I'm going to reroute that one and drain it directly over board. The only drain that's possibly lower than the water line is the shower which has been used once so far.
No, if it drains/pumps overboard it doesn't have the grey water option. Most lakes do not have that requirement. Lake George, in NY, is one of them that's in your neck of the woods that does, though. We'll revisit my last sentence, above, for the explanation.

But, sure, if you want to, you can divert that galley sink overboard. Or... just scrape the plates before washing them - that would be a $0 "fix" :)
 
No, if it drains/pumps overboard it doesn't have the grey water option. Most lakes do not have that requirement. Lake George, in NY, is one of them that's in your neck of the woods that does, though. We'll revisit my last sentence, above, for the explanation.

But, sure, if you want to, you can divert that galley sink overboard. Or... just scrape the plates before washing them - that would be a $0 "fix" :)
We used to wash our dishes with the transom shower. Nice clean, hot water and the galley sink drain stayed clean. Kept a trash bag next to the shower while we worked for the big chunks.
 
We used to wash our dishes with the transom shower. Nice clean, hot water and the galley sink drain stayed clean. Kept a trash bag next to the shower while we worked for the big chunks.

That works great unless you happen to boat on the Great Object-Sucking River. Whenever I get close to the swim platform carrying objects, they leap right out of my hands in a desperate bid for freedom.
 
I think this is an easy solution.
GUEST_95e6adce-6cab-4356-882d-4f715cf4a467-2.jpg
 
  • Like
Reactions: QT1
The sump does pump over board but I guess because the boat was on a lake it was built to have the grey water tank option? The galley sink is what I'm concerned about because of food scraps and such. When I got the boat that drain was slow because it had accumulated lots of stuff that got nasty. I'm going to reroute that one and drain it directly over board. The only drain that's possibly lower than the water line is the shower which has been used once so far.
Installing a through-hull and drain for the sink is an easy, one hour job. You'll be well above the water line but install the through-hull low enough to get good drainage
 

Forum statistics

Threads
112,946
Messages
1,422,777
Members
60,929
Latest member
Henchman
Back
Top