I found this article on the cichlid-forum.com a while ago, and I actually installed 5 of them and water tested them this past weekend. Very simple. edit: and the key is getting the gray pvc in the electrical conduit section
http://www.cichlid-forum.com/articles/diy_bulkheads.php
ps. i'll try to post pics tonight.
http://www.cichlid-forum.com/articles/diy_bulkheads.php
ps. i'll try to post pics tonight.