Transom thru hole

[Recoil Rob]

I just replace the rubber scupper flaps before the start of every season and then pull them off at the end of the year so any residual water can drain out of them. When I first bought the boat, the rubber scupper flaps were of an unknown age and did the same thing where if someone stood in the rear corner of the boat, water would come pooling in. Since replacing mine every season, I haven't had that issue since then, and you can get replacements online for pretty cheap, I think a 3 pack is around $20 or less. Plus, it's cheap insurance to potentially avoid any issues that the old ones might give you.

Well, no wonder they were leaking, must be the original ones from 20 years ago. Yes they are 1.5 inches, I'll get some and replace them.

I'm curious as to if I can get screens for the side in the cockpit to prevent crabs and bunker bits from getting in the pipe.

Thanks for all your help.

 

[Recoil Rob]

The old flaps I removed were less than 1.5 inches, they must've shrunk. So I measured the diameter of the bearing surface on the bronze fitting and that's actually 1-5/8 and I do see flaps that size. FWIW.

 

[Mustang65fbk]

Well, no wonder they were leaking, must be the original ones from 20 years ago. Yes they are 1.5 inches, I'll get some and replace them.

I'm curious as to if I can get screens for the side in the cockpit to prevent crabs and bunker bits from getting in the pipe.

Thanks for all your help.

View attachment 36953

Yeah, those look like they've seen better days. In regards to the ones in the cockpit, if your boat is anything like mine they've got the ones with the one solid bar going through the center of them, pictured in the first link below. I think your best bet would be to replace them with something like what I've posted in the second link below that is grated or whatnot. Though I've heard replacing them can be a bit of a PITA depending on the year, model and just how difficult they are to get out in the first place. There's a ton of different options out there for those as well, just type in "Grady White cockpit drain" into Google and you'll see a multitude of different options out there.

Cockpit Drains - Fits 1-1/2" Debris Bar Insert / White / Tapered Head - T-H Marine Supplies

Description SKUs Dimensions Tapered head design permits flush installation and complete drainage for any deck or cockpit area. Drop-in screen models are notched for flush fit. Available in 90 degree and white only. Mounting nut included. Tapered and flat head cockpit drains Complete drainage for...

thmarinesupplies.com

1.5" Cockpit Deck Drain - 90°

Cockpit Deck Drain - 90°

www.boatoutfitters.com

 

[Recoil Rob]

Actually, I believe mine are wide open, I'll have to look when the weather gets better. Thank you.

 

[Mustang65fbk]

The old flaps I removed were less than 1.5 inches, they must've shrunk. So I measured the diameter of the bearing surface on the bronze fitting and that's actually 1-5/8 and I do see flaps that size. FWIW.

A couple different things would be that... A. It's possible someone has swapped out the scupper drains themselves, though probably not. B. If the drain hole is 1 5/8" you wouldn't want something that's the exact same size as it would never seal or fully open all the way. Which is why I believe they're supposed to be a 1.5" flapper. Though you could always try something in between, as I know they make something along the lines of a 1 9/16" flapper, which is just slightly bigger than 1.5". That being said, they should open/flow freely, so you don't want something larger than it should be and have the flapper stuck open/close. C. It is possible that the solid bar going through the center of your current deck drains broke off, as one of the drains on my boat did just that.

 

[DennisG01]

I just looked the scuppers on my 2004 180, the seem to be bronze thru hulls with rubber flaps and they leak badly. If someone sits in one of the rear seats and inch of water will come into the boat.

Inside the bilge, these fittings are attached to 2 inch radiator hose, which then makes its way up to the drains in the cockpit, so they can't be removed.
Do I have any options with these? I suppose I could try changing the rubber flaps. Does anyone know of a manufacturer who makes a ball valve that's big enough to fit over the bronze escutcheon which is just under 3 inches?p

What do you mean by "2" hose, thru hull, drain" can't be replaced? Absolutely, they can all be replaced.

Your flapper is pushed inwards.

Flappers don't stop water from entering the hose when the boat is at rest - they're meant to do so when backing down. Too much weight in a corner (bilge water and accessories add to this) will put that corner below the waterline and then nature takes it's course.