Islandboy85
Well-Known Member
I'm having trouble finding designs for a diy inline sight glass. I thought about using stainless/brass compression fittings and poly tube, but that started to get expensive. I've seen some designs in the past that were assembled with copper pipe fittings, but couldn't find a write up on them. Anybody know what size tube, fittings, and o-rings i would need to assemble my sight glass?