<a href=showthread.php?s=&postid=9139391#post9139391 target=_blank>Originally posted</a> by JD46
If you order from Savko, you must order the lightweight bulkheads. The Schedule 80 bulkheads will not fit the AGA drilled holes.
JD
Just to clarify, unless they've changed the bulkheads at Savko, their 3/4" lightweight bulkheads fit a 1 3/4" hole. For the AGA 180, you need 3/4" bulkheads that fit a 1 1/2" hole. I found those at premium aquatics.
Miles