thru hull fittings check valve

[gspier]

On my NSC 40' I have several thru hull fittings on my boat that have check valves in them. I have tried to lubricate these with WD-40. I am concerned with these check valves have not been working correctly and think it might have led to my grey water pump burning out. Can these check valves be eliminated even if they are at the water line?? I do not think there are internal shut offs for these.

[JerseyNSC40]

Greg, I have one off my boat now the issue is that they are like a metal flapper type valve which is used on some exhaust exits. They only open one way, from internal pressure. I am going to the boat tomorrow for some work, I will take a picture of the one I have off the boat now. They do have a large nut on top which is removable too, this could allow better lubrication. The one on my AC exit is always sticking but I cannot get to it without major surgery. My next best plan was the WD 40 , but it is like trying to wash your car while it is in the garage with the door shut!! You spray the outside but very little gets in.
They can be eliminated it is overkill , they are all above water line. I was talking to the marina manager where I get service and he said if grey water acts up, easy to eliminate it.
Galley sink is already direct overboard. That sump box we both messed with can also be sent right out through a thru hull, probably under sink and run the 2 right overboard.
Same in the aft head, sink is real easy and then just tie in the shower sump in the floor which may be a little challenging but not too bad.
Email you pictures of the valve Sat night. Was going to email you tonight , checked site and there you were.

[yhc]

Good evening Craig,

Would you e-mail me the pictures as well? I would be interested in seeing them.

Regards,

yhc

[JerseyNSC40]

Send me a PM with your email address Yan, I am not good posting here.
Have not heard from you for awhile, ready for Spring and summer up there?
Craig

[yhc]

Am I ready for spring/summer...oh yeah! Are we there yet...oh nooooo! We are having a record setting snow this winter and hovering around 20-30'F still. It is good to know today is the 1st day of spring but it sure doesn't feel like it here yet. But it will be soon enough.

I sent you an e-mail w/ the info. Thanks Craig.

Yong