Converting grey water from holding tank to overboard

[gbeato]

I have a 2005 DA320 which originally came from Lake George so it was outfitted for draining grey water from sinks to the holding tank. I purchased the boat and now have it on Lake Champlain which allows grey water to be discharged overboard. I see an overboard drain with a hose connected to it behind the sink in the cabinet but I cannot see where it comes from. Does anyone know how to convert the grey water system?:huh:

 

[Bugsy24]

George, go on the Sea Ray Web site, and find your Boat in the Parts Section! It should show you how it's normally Plumbed!

 

[Lazy Daze]

If it was originally built with a grey water system, it may or may not have all the appropriate thru-hulls. If there is one there (if I read your post correctly, you're saying there is at least one) it may have the hose simply capped off to keep water from coming in.

Basically, the pump that normally takes some of your grey water to the holding tank can now be diverted to a thru hull. Any sink that is high enough above the water line (like the cockpit, for example) can simply be gravity drained overboard via a thru-hull.

If all your sinks currently go to a pump, keep it simple and just re-plumb that to a thru-hull.

 

[Knot a problem Rick]

Great topic
My 2007 290 dancer Has the galley and head sink plumbed into the sump box and overboard via pump. trying to add thur hull for gravity drainage of at least galley sink as it is making a smelly mes out of the sump box.
looks like it will be approx 25 " below galley window
Called searay no help need some info as to location of thru hull to be installed
Thanks

 

[Lazy Daze]

There is no "best" place to put it. You can put it wherever you would like that makes sense to you. Remember to install an upward loop right before the thru-hull. The option is to simply clean the box once in a while. If you do a little bit of cleaning on a regular basis, it's not that much to deal with. When it get's neglected, then it turns into a slimy, smelly mess.

 

[JimFromMD]

I had this very same issue as my boat came from Lake George. I looked into re-plumbing all the sinks to their original configuration but it would require a lot of work. End result was that I had another through hull added at the stern. Everything is as it was with the grey water system (everything into shower box), except now the shower box pumps over the side at the stern instead of into the holding tank. Far cheaper solution.

As for stinkyness - your main concern is any food going down the galley sink. Get a flat sink-drain rubber filter/cover from Bed Bath and Beyond like you would use at home and lay it over the drain to catch any big particles. At the end of the weekend I check the filter tube in the shower box for anything, then run the hot water until the HW tank is emptied and cold water comes through. I also occasionally run some simple green through, and periodically clean the shower box with a toothbrush (like 2x a season). The hot water really cleans things out, along with some dish soap or simple green in the box while you away for extended times. I've not had any foul odors or problems in 5 seasons.

Last thing... look for the thread on here and email away for some replacement check valves/veins for the box. I've replaced mine 2x so far, but it is SIMPLE to do. I think they may wear a little quicker due to the extra use (shower, plus sinks vs just shower). You just pull out the old rubber valve and slide a new one in the tube.


Edit - PS... Regarding food in the shower box... I had a young kid get sea sick in the head sink. I found out at the end of the weekend the hard way because they were embarrassed to say something... Added that to my list of announcements for first-time guests, along with the "only boat TP goes in the toilet... nothing else"!