No. 107 - April 1994

BROACH DRAINS BY MICHAEL NICOLL-GRIFFITH, '40:

 

In the October (1993) Tanzer Talk, Dave Dougall described some of his boat mods, one of them, his broach drains. So here is some competition from me!

 

I have broach drains too. They are very effective. For my drains, I did not want to have hoses running inside any part of the cabin, already enough in there, eh, John Charters?

 

So I decided to drill out from the gutter under the cockpit locker cover. Under the lifting seat the drain is invisible. But in this position it does not drain that dirty puddle at the front of the cockpit seat, which Dave's might. Putting it in the gutter has the advantage that the cockpit is the widest there and, depending on how closely the cover fits, the water may drain off the seat into the gutter more slowly than the drain empties it.

 

My hole (start with a pilot hole to get the angles right) is drilled at right angles to the hull, tucked up under the sheer stripe, so it is mostly invisible. This means the pipe will be raked slightly aft. This rake improves the suction and reduces the number of bubbles rising through the pipe when the boat is heeled.

 

Once the holes are drilled in their straight line, you can insert standard 1.25 inch diameter white household sink drain pipe. Do not cut the pipe off straight at the hull. Instead, leave a tiny lip at the bottom, like the spout of a milk jug, to hold dribbles away from the hull. Otherwise at your mooring you can get a dirty streak from the factories around you. Epoxy the pipe in place. Use nice white epoxy or Marine Tex, not the yellowy stuff that made my workmanship look so messy.

 

My cockpit lockers have not had any measurable quantity of water in them since I installed these drains. So I do not know, should the lockers become full of water, whether the ocean would come in through the pipes when the boat was heeled so heavily laden.

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