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#1
12-11-2008, 07:18 PM
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How do people crack bulkheads?? I've never personally seen one crack, either during install or afterwards. I guess to each their own, but most of my plumbing isn't even sch 40.
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Brad 
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#2
12-11-2008, 07:26 PM
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+1 .. how exactly do you crack a bulkhead?? Are people overtightening these things ten times over?? You realize that amount of tension is bad for the glass too right? ... Hand tighten and then maybe a 1/4 turn with a wrench after that. If it's still leaking, something is wrong. If you're really paranoid, put a little silicone down. Shouldn't have to be anything more than that.
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-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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#3
12-11-2008, 08:19 PM
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I have a spare from my old 90 somewhere in my "extra parts bin". I remember it costing a small fortune so hopefully it is the better quality one, although I wouldn't be surprised if it was the cheapo.
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Christy's Reef Blog My 180 Build Every electronic component is shipped with smoke stored deep inside.... only a real genius can find a way to set it free.
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#4
12-11-2008, 08:25 PM
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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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#5
12-11-2008, 08:30 PM
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Quote:
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I once had a Big tank...I now have two Huskies and a coyote
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#6
12-11-2008, 10:17 PM
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All the cracked bulkheads I've dealt with have cracked right on the mold seams. My guess is it was a shotty batch. The main failure cause for these was external pump vibration. (I really had to dampen this down with spaflex and rubber)
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#7
12-11-2008, 10:20 PM
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Hmmm, interesting. It broke even with spaflex? I've always used spaflex or vinyl hose to dampen the vibrations from the pump but I was trying to protect the glass itself of the sump wall, not the bulkhead.
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-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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#8
12-11-2008, 11:01 PM
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I've repaired quite a few tanks with damaged bulkheads. Sometimes cracked, cross threaded or just leaking. Never seen any problems with the good sch80s, Sch40s are good to but those cheap sch20 black ones are complete junk. Threads are too fine, not reverse threaded, think brittle plastic, and tiny thin gaskets. You're just asking for trouble using those and they are usually the ones I'm always fixing.
The money you save is peanuts compared to the rest of the setup, if you use cheap bulkheads might as well use thinner glass to and skip the home insurance. Especially on a close loop where replacing a bulkhead means draining the tank.
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