This Attwood Scupper Valve is designed for boats with self bailing cockpits. Plastic and rubber washers with a flap are designed to act as a valve. Mounted on the transom slightly above the waterline allows water out but seals to prevent backwash.
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Scuppers and Valves
I have a boat with a 2" hole, and the transom is 3" thick. Will this product work for that? Thanks
The scupper I got just fits on the outside of the hull. I am going to use apiece of pvc pipe to go through my hull.
The Atwood Scupper Valve would be a little bigger than your hole, but it may work. You would need to make sure the hole is above the waterline in this case as well.
JD Tech Associate
I have a 1991 Boston Whaler 27' workaround and I have two scuppers valve to replace.The internal diameter is 760 mm - and the external is about 1150 mm.The question is if you have this article with this dimensions.Thanks in advance for your answer
It is 2 7/8" overall and will fit up to a 2" hole.
I have a 1999 Boston Whaler 260 Outrage and I have four to replace. Will this work on that boat?
I'm not sure off the top of my head but if you measure the mounting hole spacing on the flange and they match, that's the only important thing.
Yes it will! We have an Aquasport 196 and have three in the new transom I built last summer and they work just great. Just make sure the hole is right size and the rubber not squeezed when installing the ring.
It works on a Boston whealer 23 ft outrage?
I think it should. I installed them on a 26' Outrage.
I installed it on my 22' Twin Vee that has a flush deck. Works great! I suppose it would be similar with your Whaler if it too has a flush deck.
Yes.... it should.
It really depends on if that is a self bailing boat or not mine is so it worked perfect for me. Thanks
I'm not sure of the diameter on the Whaler but I can tell you that the ones from Jamestown fit most applications. I put them in my 17' Mako
It worked on my 23' parker with an outboard engine.
I installed these on a Grady White Fisherman 222 and they work great. Be careful you don't over tighten the screws.
will this scupper valve fit the 1 inch fittings on a 1992 mako 221 and what scupper valve will fit the large scuppers on the same boat?
I really have no way to know the answer. They are working fine on my boat.
This scupper is bigger than 1". Wish I had a picture of the valve your talking about. My opening coming out of the boat is an inch itself and the scupper goes right over that, flushed to the boat. Not sure if you can send a pic but hope this helps some
The flapper valve did not work well on my 19" Bayliner. It let water in and kept it in. You would think that it was installed backwards. But reversing it did not help. I went to my hardware store and bought one inch brass check valves which are designed to allow water to flow in only one direction. The valve is held closed with a very weak spring. That didn't work either. My boat repair guy said I should get a pingpong type valve, but by that time I was fed up with the problem and had sealed the scupper opening and was draining the deck into the bilge. That works just fine. I did add an extra bilge pump for safety.
Would this particular scupper valve fit on to a Boston Whaler for replacement ?
Yes it will
You need to measure what you have now and compare to the new one.
not sure if they fit Boston Whaler...what size is Boston Whaler scupper valves....they fit my C'halk..sorry
will this valve fit a 1 1/2" inside diameter hole?
The scupper valve has a 1 3/4 opening in the center while your opening is a 1 1/2. Do you have a fitting on the outside of your boat or are you screwing it straight to the boat , if to the boat I can't see why it wouldn't work. If to a fitting, I would make sure it has also a 2 inch dia. Hope this helps. Mike
yes it will
Bill, I will measure the hole size in the morning and get back with you. Mike
DAVID V: my old scupper valve outside diameter 3 inch. 2 and 3/4 will it work ?
The 3 inch is slightly larger,if your replacing an old one and dont mind the larger ring marks around smaller scupper and fill the old screw holes with sealer it should work fine.The inside diameter of the scupper seal is 1 and 1/2 inch also,so keep in mind on how big your hole is and how perfect you want it covered.Generally a 1/4 in is quite workable with an item like that.
David:It should work, but your drill holes won't line up and might show on the outside edge of the valve. If possible I would replace the old ones with 3 inch so that everything matches again.Hope this helps!
Hi -- can you clarify the size of this scupper valve? Not sure what "2 13/4" means... Please let me know if the measurement is across the outside edge or if it refers to the opening in the hull. Thanks.
2 3/4 inch is the outside diameter of the rubber. The scupper valve opening size is about 1 inch. This is a standard scupper valve. The scupper valve flap is about 1 1/2 inch.
Sounds like a typo. Under the product information the measurement information is "2 3/4" .
2-3/4" is the outer diameter of the scupper valve itself.
I think it is supposed to be 2 and 3/4. That is the total distance across the valve.
Are there 2 of these in a pack? Enough for both sides of the boat?
They are sold individually.
Product looked well made, but unfortunately the wrong size
We had to return the scuppers as they did not fit our 15 Boston Whaler Rage
I needed to replace the transom scuppers on my 1994 Robalo 2520. The originals were sun faded, cracked, and had rotted rubber flaps. I chose these Atwood scuppers as exact replacements and they fit just like the ones I took off!