The
cockpit drains in a Tanzer 22 are quite troublesome. After double wrapping the
current drain pipes with fiberglass mat and epoxy resin (West System), both
pipes still leaked. Even if this method
works, it is a difficult job to complete.
I gave up on the wrapping technique to try lining the drain pipes. Luckily standard PVC pipe fit. 7/8 O.D.( ¾ I.D.) is a common hardware store item. The 7/8 outer diameter fits snugly into the pipes. I had to open up one of the holes on the cockpit deck with a hole saw to fit the PVC pipe.
 |
| PVC at cockpit deck. snug fit |
 |
| extra Length for handling during fitting |
Here’s the process.
Hopefully, the photos will fill in the blanks.
Starting with a 24 inch
pipe, push the PVC pipe up the drain to check the fit.
24 inches will leave a
few inches for handling. After you have fit it, mark it, and cut it with a pipe
cutter.
After you are sure that it
is right, overload the ends of the PVC pipe with a good marine grade adhesive
caulk like 3M’s slow cure. Let it cure
per the instructions.
With this method, the
drains are a smaller diameter, but, it has worked well for two years. The bilge
is dry and rainwater drains from the cockpit.
 |
| from the top side |
 |
| topside |
 |
| Bottom view: trim excess caulk after curing |
To test for leaks on the
hard, insert rubber stoppers in both drains. Be sure that the caulk is well
cured. Fill the cockpit with a few
inches of water. After a few hours, check the bilge. If you see water, try
again.
To keep the drains clean,
push a dowel or a refrigerator brush through the pipe. A refrigerator brush
looks like a 36 inch long bottle brush and can be purchased at most hardware
stores in the cleaning supply section.
Good luck and take your time
to get a tight seal.
