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Random Quote: In theory, practice and theory are the same, but in practice they are diffrent. (Larry McVoy)
This is my new to me 2000 Donzi 28ZF (that's not me in pic). Take a look at the scupper thru hull just below water line ( you can barely see the top of it). Both deck drains are thru hulls only meaning no ping pong balls, duck bills, or flapper. Should there be one of these type drains instead of just thru hulls? I know there are other threads on this topic but I didn't want to hi-jack someone elses. \
Last edited by hdle; 01-15-2010 at 03:14 PM.
Reason: add picture
Sorry, I'm trying to get the pictures so you can look at them. But you probably will only be able to see the very top of the thru hulls anyway because it's right at waterline. How about taking a stab at the question though?
no they do not always have scuppers, ping pong balls, or anything else.
If the deck is high enough from the waterline you dont need it, water will only want to find its own level, so a little bit MAY get in, but it wont go anywhere.
Now if that fitting cracks or the hose fails well that is another story, no scupper or ping pong ball will help that.
no they do not always have scuppers, ping pong balls, or anything else.
If the deck is high enough from the waterline you dont need it, water will only want to find its own level, so a little bit MAY get in, but it wont go anywhere.
Now if that fitting cracks or the hose fails well that is another story, no scupper or ping pong ball will help that.
Ray is right. If you have some water ingress onto the deck, but it seems to pose no real problem, i.e. drains back out quickly, then it's no big deal.
The key will always be the integrity of the t/hulls and the hoses attached to them. Should the hose dry out to the point of cracking (it is a 10 year old boat...), then you will have REAL problems.
Stick your head in the access hatches and see if you can do an inspection. And if you can reach the t/hulls, I'd replace the hoses if I were you...
sometimes drains through the side of the hull like that are direct discharge, meaning no hoses.
No scuppers poses no problems in those situations also.
sometimes drains through the side of the hull like that are direct discharge, meaning no hoses.
No scuppers poses no problems in those situations also.
Ray,
I work for Proline...our sister company is Donzi...
I have seen two such self bailing drain boat decks with drains to low. The first a 22' deep V WellCraft - the drain went to the in floor fish boxes (they've since corrected newer models). They were always filling up and melting the ice. This also was not only annoying but left the fishboxes dirtier than they should have been. The second a 22' Panga. If their was more than two people on board the deck would hold a small amount of water near the stern. Both situations posed no serious threat but, seemed to me to be a design flaw. I looked into adding the flapper style stop to the side drains however, it was not easy to access and detach the existing drain body. If you have someone experienced in adding the flapper style, I would do it - it may help.
Thanks seabob I will see about replacing the hoses. I have inspected them but was thinking replacing them would be prudent. A couple of challenges I have encountered
1.The hose going from the bait well to the t/hull is not accessible at the t/hull. 2. The hose attached to the forward most box in the bow is also not accessible. Should I put in 2 new access hatches to be able to change these hoses out?
Thanks seabob I will see about replacing the hoses. I have inspected them but was thinking replacing them would be prudent. A couple of challenges I have encountered
1.The hose going from the bait well to the t/hull is not accessible at the t/hull. 2. The hose attached to the forward most box in the bow is also not accessible. Should I put in 2 new access hatches to be able to change these hoses out?
The forward storage compartment I wouldn't worry about. Now, does the baitwell drain empty port or starboard? Is there a battery switch box aft that may be removed to gain access? Just thinking about where we put that stuff...
I just climbed in and looked. The baitwell drain is starboard and it is completly not accesible as it sits. There is plenty of area for a hatch to be installed.
The aft configuration is from starboard to port: transom door, then hatch 1 where the oil reservoirs are, then hatch 2 where the batteries and the swich box are.
The starboard deck drain will require someone pretty small to get to. I'll have to remove both oil reservoirs and get my daughters "weight challenged boyfriend" (skinny) boyfriend to try and climb in to reach the deck drain t/hull.
I just climbed in and looked. The baitwell drain is starboard and it is completly not accesible as it sits. There is plenty of area for a hatch to be installed.
The aft configuration is from starboard to port: transom door, then hatch 1 where the oil reservoirs are, then hatch 2 where the batteries and the swich box are.
The starboard deck drain will require someone pretty small to get to. I'll have to remove both oil reservoirs and get my daughters "weight challenged boyfriend" (skinny) boyfriend to try and climb in to reach the deck drain t/hull.
I'm 6' 2", 170 lbs. I fit in a lot of places I'd rather not...
HDLE, I don't know how the 28 is but I had purschased a new 30ZF with a similar setup except my scuppers were not underwater. My boat almost sank 3 times and the last time I got a salvage bill. The issue with my boat was it would start taking water when slow trolling or when at anchor. Theproblem ended up being the scuppers. The water would start coming in through the scuppers in to the deck. You could not see the water coming in because it would not be on the deck but on the recessed track. The water would then make its way into the removable fish box and into the bilge. The 2 bilge pumps would not be able to keep up and the boat would start to sink. I had to fight with Donzi to get them to fix it. They replaced the scuppers and I don't recall what they used and they put a high water alarm. I was so upset that I sold the boat for a loss. I was not pleased at how Donzi handled it and the trouble I had to get them to fix it.
As I understand this, should a clamp or hose fail....seawater runs in the bilge ? How is this set-up superior to the common scupper above water line direct drain off deck ?
As I understand this, should a clamp or hose fail....seawater runs in the bilge ? How is this set-up superior to the common scupper above water line direct drain off deck ?
FF, obviously, you bring up a good point. If a self-bailing deck is set up with a direct scupper overboard, there are no hoses, hose clamps, or t/hulls to worry about.
Most production builders use the cockpit drain/hose/thru hull method of draining cockpits.
Donzi, Proline, Hydra-Sports, Stamas, among many, many others, employ this method. The key is using superior products, along with the skilled employee that installs them.
This is my new to me 2000 Donzi 28ZF (that's not me in pic). Take a look at the scupper thru hull just below water line ( you can barely see the top of it). Both deck drains are thru hulls only meaning no ping pong balls, duck bills, or flapper. Should there be one of these type drains instead of just thru hulls? I know there are other threads on this topic but I didn't want to hi-jack someone elses. \
Reading some of the commets, I lean to SEABOBS answers.
How about this:
Call, (800) 973-2628.
Ask for Chuck in customer service.
Could be a good idea to ask DONZI?
Chuck's certifications are pretty impressive.
"NAMS" "SAMS" certified, holds one of three hundred only, world wide, ABYC certifications, in his class, One of one thousand, world wide, with his accredidations.
Maybe ask Chuck?
I do all the time.
HDLE, I don't know how the 28 is but I had purschased a new 30ZF with a similar setup except my scuppers were not underwater. My boat almost sank 3 times and the last time I got a salvage bill. The issue with my boat was it would start taking water when slow trolling or when at anchor. Theproblem ended up being the scuppers. The water would start coming in through the scuppers in to the deck. You could not see the water coming in because it would not be on the deck but on the recessed track. The water would then make its way into the removable fish box and into the bilge. The 2 bilge pumps would not be able to keep up and the boat would start to sink. I had to fight with Donzi to get them to fix it. They replaced the scuppers and I don't recall what they used and they put a high water alarm. I was so upset that I sold the boat for a loss. I was not pleased at how Donzi handled it and the trouble I had to get them to fix it.
That is exactly my design and what I am concerned about. The water can run into the recessed track into the fish box and into the bilge without anyone knowing. I have already decided to install the extra bilge pump and a highwater alarm. What Donzi replaced the scuppers with is what I want to know. It seems to me that some kind of flapper, duckbill, or ping pong ball is what is needed. Unfortunatly I can not take it to Donzi I'm in Tx. I have talked to Chuck about a couple of other things prior to purchase and afterwards.
Donzi 28ZF Scuppers??Look at picture 
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