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  1. #1
    Senior Member Bonaqua's Avatar
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    Bulkhead help needed

    I'm starting with 50g setup / 20g sump.
    I wonder what size bulkheads I need if I want 1 overflow and 1 return. THe pump for return is Mag7 (4' overhead).

  2. #2
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    go on www.reefcentral.com, on the left of the main page there is a head loss calculator( you will know approximatly how much GPH your overflow will need to handle). After that look there is overflow size calculator in function of the GPH...

    Steve

    Use a return pipe with a diameter of at least 1,5 inch or you will have a big head lost...

  3. #3
    Senior Member Bonaqua's Avatar
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    I was told to use 1.5" bulkhead for overflow, and 3/4" for return.
    mag7 at 4' gives around 525 g/h.

  4. #4
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    You really should go with the 1.5 inch drain and 1 inch optional holes for other uses. The hole drilling should not be any different in price. I have been drilling tanks and setting up drilled systems since the mid 70s and all I can say is .... you will not regret this advice if you choose to take it.
    Rob

  5. #5
    Senior Member Bonaqua's Avatar
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    OSD, so, you're telling me 1.5" is OK for overflow BH, and to drill some spare ones and plug'em untill I need'em??
    Is 3/4"BH ok for return ( around 550 g/h flow )??

  6. #6
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    that's what I am telling you .. 1.5 inch plumbing for drains is pretty standard and you will not be disappointed. The pumps input and out put specs will determine the final plumbing size for the pickup and returns but 1 inch bulkheads are also pretty much the standard for them unless the tank is very large. The more standard the sizes the easier it will be to find parts as well. Yes drill, bulkhead and cap for now because there is no drilling a tank with water in it. You will need a 2.5 inch hole for the 1.5 inch bulkhead and 1.75 inch holes for the 1 inch bulkheads.
    Rob

  7. #7
    Senior Member Bonaqua's Avatar
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    where can I find the pump specs?

  8. #8
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    the specs for any given pump should be part of the details or features listed for that pump at any site, including this one that sells the pumps your interested in.
    Rob

  9. #9
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    Mag 7 Right? here's a link to ACs on-line shop

    http://aquariacanada.com/osCommerce/...products_id=44

    Rob

  10. #10
    Senior Member Bonaqua's Avatar
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    I saw that. It gives me only fittings on input and output of the pump. It doesn't give me any pipe recomendations, and I have no clue how to figure out bulkhead size for return nor what pipe size to use not to lose any power.
    Only thing I was told, from 700 gph @ 4' overhead I get around 5 gph. no pipe size.

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