deck drain curiosity

[fishchaser]

hey guys curiosity is killing me i have a 250 ccp (has not hit the water yet still repairing/rebuilding) and it has to deck drains that have hoses going down to drain holes on the side of the boat it appears they are below the water line !! if there is water on the deck will it drain or does it wait until youre running on plane ???

[seabob4]

hey guys curiosity is killing me i have a 250 ccp (has not hit the water yet still repairing/rebuilding) and it has to deck drains that have hoses going down to drain holes on the side of the boat it appears they are below the water line !! if there is water on the deck will it drain or does it wait until youre running on plane ???

Pretty much.  At rest, water will back fill into the hoses until it reaches the water level outside the boat...

[John Jones]

yep, but the reverse is true too.  Water in the boat will drain down to the water level outside the hull.

[seabob4]

yep, but the reverse is true too.  Water in the boat will drain down to the water level outside the hull.

The old "on plane" phenomenon...

[cclovern]

Check out my fix for this problem , the drain hose size may be different but the basic idea is the same. 1979 22-2 Family Fisherman

[Capt. Bob]

hey guys curiosity is killing me i have a 250 ccp (has not hit the water yet still repairing/rebuilding) and it has to deck drains that have hoses going down to drain holes on the side of the boat it appears they are below the water line !! if there is water on the deck will it drain or does it wait until youre running on plane ???

The entire thread is about cockpit drainage but the link deals with the CCP model.
http://classicaquasport.com/smf/index.php?topic=4319.0

That's scary looking but you can see the drain hookup on the CCP
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If you look carefully, you can see the coffin box drain just below the hull stripe and below the second "S" in madness. The rear drain is right at the waterline.
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I have relocated the batteries under the console but added a full bracket that moves the motor back 26" so my drains are always submerged. I control excess water with a pair of these.

[MarshMarlowe196]

This is stated in one of Captain Bob's links; to be clear:  Water will drain out of a thru-hull fitting that is below the waterline.  As stated in the link, If your deck gets below the waterline, then the water will backfill onto your deck.  But, as long as your deck is above the waterline, the water will drain off the deck even though the fitting is below the waterline.  You don't need to be on plane for the water to drain, though that will certainly hasten the draining of the water off your deck.  

Aquasports claim to be self bailing, but just barely.  The decks in the boats are just a little too low.  An inch or two added to the floor height in these boats would have made a huge difference in their ability to self-bail.

[seabob4]

Aquasports claim to be self bailing, but just barely. The decks in the boats are just a little too low. An inch or two added to the floor height in these boats would have made a huge difference in their ability to self-bail.

...which is very common throughout the industry!

[John Jones]

Yup.  Some current "top of the line" bay boats will keep your feet wet all day.  A friend has a 22 Pathfinder.  He has to keep foam plugs in the scuppers or else there will be a couple of inches of water in the back end of the boat when not running..  I understand the newest Pathfinders were modified somewhat but people that had the earlier Pathfinders do not like the new ones for a multitude of reasons.

[MarshMarlowe196]

That’s true, it is common throughout the industry, and having been employed in the industry myself, I can attest to this as well.  BUT- I have seen some self-bailing setups that have worked well.  It was pretty simple really, and it had almost everything to do with the floor height in relation to the waterline on the given boat.  The problem is that most boats that claim to be self bailing are self bailing, until the owner starts adding weight to the stern (I am guilty of this too) then it doesn’t work so well anymore.  The scuppers have be either right at the waterline or below for it to work, but if the floor height is well above the waterline, then the self bailing feature should continue to work well even with lots of added weight (to a point of course).  

If you’re rebuilding the boat and you plan on replacing the floor, if it were me, I’d go ahead and raise it a few inches.  If I ever rebuild my Aqua, I plan on raising my floor.

[seabob4]

Jesse,
I'm with you.  Interestingly enough, when we load a boat up for CG flotation testing, the claim by the manufacturer that a boat is self-bailing in mever considered at the loaded weight.  It is simply the manufacturers word, or "claim"...

[Glock Diver]

Speaking of a curious drain, I've yet to figure out what this one does on my 225.  Bob, any ideas?  On the port side here, just 3" below the rub rail, all the way aft.

My only guess is that once upon a time, it was the fishbox pump out, as I have a switch on my console marked "Fish Box Pump Out", and I'm assuming it was disabled years ago, as my fish box currently drains into the bilge.

[Circle Hooked]

Mike your right,that's for the fish box pump out,is there still a hose hooked to it?

[pete]

roger that,fish box pump out,you could use that switch fot the fresh water system

[Glock Diver]

roger that,fish box pump out,you could use that switch fot the fresh water system

  Good thinking!  


I don't know if there's a hose connected to that thru-hull.  My fat head won't fit through the access hatch to see!  However, there's definitely no hose connected to the drain of the fish box, and there's no pump that I can find.  I guess there's no danger in letting the fishbox drain into the bilge, is there?