if some one cracks a bulkhead that is not the fault of the bulkhead, but rather the instalation. you either tightened it way way to much , in which case your lucky the glass didn't break or you tried to force plumbing which placed a strain on the bulkhead, and again your lucky the glass didn't break.
take a look at the PSI rating for Sched 40 and let me know if you have anything on your fishtank that even comes close to 1/4 of its rating.
Sched 80 is a waist of money and is bulky , cumbersome and ugly, I used sched 80 on my old tank and never will use them again if only for the physical size of area clear they need to be able to tighten them.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
Some strive to be perfect.... I just strive.
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