Pulpit install / assembly...

[Airslot]

Well Hammer, if you wanna get trick about it, go to a plumbing supply house and get a pair of 4" closet flanges, stick em with some 4200 fast set, and put the drain pipe between them...



Edit to add: The top one is 4 x 3". This is the one you would really want:



Should be $6 or $7 each ;D