Quote Originally Posted by DennisP View Post
No, I meant eyeball returns, not drains...
My bad. Sorry. Doh!

... Since everything else is 2", why go with 1.5" on anything is my thought...
As you point out 1.5" is easier to assemble, fittings are cheaper, 2 x 1.5" has about the same cross section area as 1 x 2". OTOH no reason not to build it with 2".