What size of bulkhead.

[Doug]

A 2in. hole takes a 1 1/2in. bulkhead, which takes 1 1/4in. pipe. Thats the standard that Jayson uses.

I had said my Mak4 currently drives two overflows of that size, so one of the same is pushing it, unless, the higher head cuts it down. Like I also mentioned, you can run a bleeder into your sump though.