On a 1968 Boston Whaler 16'7" blue deck hull, I'm replacing a leaking brass tube main drain and wanted to use PVC instead and went with a 3/4" Sch 40 PVC pipe with a Lasco brand round PVC bushing 3/4" x 1 1/4" from the local Lowes (see 1st picture) at both ends and all sealed with 3M 4000. What I did was cut off the 1 1/4" side of the bushing and used the 3/4" Side (2nd & 3rd picture), see the entire assembly in the 4th picture. Of course the PVC is glued with PVC adhesive, I use Oatey Clear Heavy Duty PVC Cement.
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