A tube within a tube that can be screwed together to accommodate any transom thickness from 2-1/2" to 3-1/4". Carefully trimming the length of the tubes (while being careful to not damage the threads) will allow you to accommodate a transom as thin as 1-1/4". A threaded plug is provided that can be screwed into the end of the larger tube.
For smaller boats:
Use these fittings to replace earlier brass tubes that have now corroded and therefore leak. The larger white tube, at 1-1/2" diameter, will fit in place of the earlier 1-9/16" diameter brass tube. Both flanges are 2" diameter and will cover the old hole completely. In fact, since the old tubes were installed very close to the bottom corner of the cockpit sole, you may need to sand the edge of one flange to create a flat side which will be mounted inside the cockpit. Mount it low in the hole, in the same position as the old scupper.
If your transom is too narrow to use the full length of both tubes, always trim the length of the smaller diameter tube first, but leave at least six or seven threads for strength.
For early Catalina 22's (before 1986):
Owners of the first generation Catalina 22 have achieved success by adding these through the transom in addition to the forward mounted scupper. It is a useful addition since the original scuppers drained much too slowly and were easily plugged by debris.
For the Catalina 27:
This drain assembly can be used to replace the original through the transom brass tube on the early Catalina 27. These early boats used the drain tube to drain any water that splashed into the lazarette from around the outboard. Inboard equipped boats still had the drain tube installed to drain the locker. The plug might be particularly useful if you have allot of people in the cockpit having hors d'oeuvres. Water will be coming into the locker instead of draining out! It is likely the hole formerly occupied by the brass tube will have to be enlarged slightly in order to accommodate the diameter of this replacement part.
• Outside diameter of both flanges: 2"
• Outside diameter of large tube: 1-1/2"
• Outside diameter small tube: 1-1/4"
• Inside diameter: 15/16"
• Maximum transom thickness: 3-1/4"
• Minimum transom thickness: 2-1/2"
• Minimum transom thickness (after trimming): 1-1/4"
The original brass tubes are no longer available. The original tubes were quite thin. This allowed them to be installed with a specially machined tool. The tool crimped them in place by rolling the second end of the tube and swaging them into the transom. Years ago, the manufacturer of the tubes made them much thicker. Even though we have the custom made tools, the tubes are now too stout to crimp in place any longer.