Scuppers

[WoundUpMarine]

Last time i was offshore on anchor i realized that my deck is wet!!!! My deck height is so low that when the seas picked up the water would come rushing in the scupper holes as we rode the anchor. there was pretty consistently a half inch of water in the back of the boat. I was thinking about putting the rubber exhaust flappers over the scupper holes to try and slow water inrush down. Im opened to any ideas out there. I really dont want to put plugs in as i use the washdown pump alot and want to be able to shed water without pulling a plug. any ideas or pictures?? Heres a few shots of my stern.

 

[Raider Ronnie]

I have the same problem.
Tried a few different sets of scuppers with little improvement.
Ended up glassing in 3" pvc nipples through the transom & have 5" exhaust flappers on the outside of the transom.
I drift fish a lot and when it's rough enough that the water comes in or when I at anchor, I thread the 3" pvc plugs from the inside.

 

[steveinak]

I used to use these plumbing test plugs for my scuppers, just tighten the wing nut to seal them. I found them at home depot nice part is they are quick to put in/ take out. Another trick the guys use here is a piece of inner tube attached to the outside of the scupper, looks like a short piece of elephant trunk hanging down off the scuppers.

 

[Tunascapes]

The plumbing test caps are the best plug to use hands down. For years we used the threaded PVC caps and it was a real pain. The test caps go right in and out and don't let any water by.

 

[Raider Ronnie]

The plumbing test caps are the best plug to use hands down. For years we used the threaded PVC caps and it was a real pain. The test caps go right in and out and don't let any water by.

The test caps work great if you can match up size. My case I need 3 1/2 and they are either 3 or 4 inch caps. Those test plus fit inside pipe diameter, the threaded fittings the inside diameter are 1/2" larger.
You need to change out the center bolt & wing nut to galvi or stainless also. Keeping the bolt lubed if a good idea also.
I keep my PVC plugs lubed with some grease on the treads and they work just as good.
The best solution is to raise the deck & scupper height which I've been considering doing to mine for a few years.

 

[MBILL]

I think that the rubber scupper covers would work pretty well. Before I put covers on I had the same issue that you have, lot's of water coming through on the right conditions. The scupper covers really cut it way down. My scuppers are rectangular and huge but it shouldn't matter...

 

[Tunascapes]

The test caps work great if you can match up size. My case I need 3 1/2 and they are either 3 or 4 inch caps. Those test plus fit inside pipe diameter, the threaded fittings the inside diameter are 1/2" larger.
You need to change out the center bolt & wing nut to galvi or stainless also. Keeping the bolt lubed if a good idea also.
I keep my PVC plugs lubed with some grease on the treads and they work just as good.
The best solution is to raise the deck & scupper height which I've been considering doing to mine for a few years.

Makes sense. The ones we use are a bit different than pictured. They are actually made for wells and are all plastic and rubber. The center screw is plastic as well. I will see my buddy tomorrow. I'll ask if they have anything that might work.

 

[Frigate]

I had the same scupper covers as Mbill on the boat before the Duffy/Flowers. I said they would last two weeks, well they lasted the 17 years I had the boat. I had the 2.5"x 7.5" scuppers and it looks like Mbill has the 3"x 9" scuppers. Look on the right hand side of page 224 of the current Hamilton's catalog.

 

[Dworks]

Thought I was the only one concerned about this I have the same boat 30 YB I put the rectangle ones from Hamilton they cover the holes perfect and they don't allow water in just out if I can figure out how to post pics from an iPhone I'll post them.

 

[WoundUpMarine]

Thought I was the only one concerned about this I have the same boat 30 YB I put the rectangle ones from Hamilton they cover the holes perfect and they don't allow water in just out if I can figure out how to post pics from an iPhone I'll post them.

Thanks Dworks, i definitely want to see that, i need to solve the issue and raising the deck isn't an option!