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#1
12-03-2004, 09:59 PM
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What size of bulkhead.
ok i'm getting a 2" hole drilled for the tank. What size bulk head can i get with that the reason i'm asking i had a 1" pvc pipe to fit a 1.75 bulkhead so
i 'm hoping that i can get a 1.5" pvc ppipe for the overflow because i'm going to hopefullly get Doug's mak 4 off him to run in the basement 8 ' of head mike
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180 starfire front, LPS, millipora Doesn't matter how much you have been reading until you take the plunge. You don't know as much as you think. 
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#2
12-03-2004, 10:13 PM
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A 1.5" bulhead needs a 2.5" hole, so you'd need to get the hole bored out if you want to use a 1.5".
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#3
12-03-2004, 10:14 PM
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Well a 1" bulkhead requires a 1-3/4" hole if you're using sched40 bulkheads so the difference is 3/4" larger hole but if you're using sched80 bulkheads then you need a bigger hole because the wall thickness is larger so if you have a 2" hole I would have to guess that the biggest bulkhead you will be able to fit is a 1-1/4" bulkhead and I'm not sure if those even exist but basically I guess what I'm saying is that I'm not 100% sure and a 2" hole might even be too big for a 1" bulkhead unless we were maybe talking about sched80 bulkheads but those are more money and I'm not 100% certain what clearances you need for those anyhow but I wonder if it might just be better to pick the bulkhead you want to use and then figure out what size hole it needs?
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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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#4
12-03-2004, 10:19 PM
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1" bulkhead -> 1 3/4" hole
1.5" bulkhead -> 2.5" hole 2" bulkhead -> 3" hole
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#5
12-03-2004, 10:30 PM
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A 2in. hole takes a 1 1/2in. bulkhead, which takes 1 1/4in. pipe. Thats the standard that Jayson uses.
I had said my Mak4 currently drives two overflows of that size, so one of the same is pushing it, unless, the higher head cuts it down. Like I also mentioned, you can run a bleeder into your sump though.
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Doug
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#6
12-03-2004, 11:37 PM
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Quote:
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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#7
12-04-2004, 12:05 AM
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Pick the bulkhead first then decide on the hole size ... don't get a hole drilled before having the bulkhead you're going to use. It's a pain to change a hole size after the fact. You can always use bushings to step down the pipe size if it's too big. My advice is go big (1.5") for a drain to the sump.
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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
12-04-2004, 02:04 PM
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Quote:
 Sorry, I,m wrong and your correct Steve.
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Doug
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#9
12-04-2004, 02:58 PM
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I know that this isn't what you are asking but I would really recommend having two holes drilled in the same box and use the same method that "Herbie" on RC used - it is the best way to silence both your overflow and the sump. With only one bulkhead you would probably need a durso-type standpipe but your sump would still boil/hot-tub. I guess the sump will be in the basement anyways but it is something to think about.
Just trying to help. - Chad
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Returning to the hobby after an eight year absence.
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