bulkhead?

[Hornrob]

http://www.diy.com/diy/jsp/bq/nav.jsp?action=detail&fh_secondid=11478410&fh_location=//catalog01/en_GB/categories%3C%7B9372015%7D/categories%3C%7B9372046%7D/categories%3C%7B9372180%7D/specificationsProductType=waste___overflows/specificationsSpecificProductType=overflow_tubing

anyoe know if this would be reef safe? its polypropylene i think thats the safe stuff?

[ejit]

yeah should be...used them on my first tank build,
just dont get speed fit as they have small metal teeth in them.

[pak1802]

Push fits no good for tank plumbing as the pressure will open joints and place tank water all over floor ..

[Hornrob]

i wouldnt use it for the return, and in an overflow box it shouldnt be under much pressure? especially if i use a much wider one then i really need.