Slip/Slip, Slip/Thread, Thread/thread, Thread/Slip These bulkheads are black w/ one gasket. Completely reef safe black ABS Plastic. In stock and read to ship!!!!
Sizes are determined by the INSIDE DIAMETER of the pipe that inserts into the bulk head. (Not by the outside diameter of the bulkhead) Ex. A 1" bulkhead is used for 1" schedule 40 pvc pipe. Minimum holes size is listed.
works great to install 1/2" bulkhead 28mm diamond coated hole saw. Works great to install 1/2" bulkhead. Drills a 1.1" hole. Works on glass, tile, stone, etc.