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  1. #1

    Lph gravity return

    Guys does anyone have a link or know what litres per hour go through 2” and 4” pipe via gravity return, I have had a look on the web without any luck. Thanks


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  2. #2
    Senior Member Rank = Grand Champion Ajm's Avatar
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    Quote Originally Posted by charco123 View Post
    Guys does anyone have a link or know what litres per hour go through 2” and 4” pipe via gravity return, I have had a look on the web without any luck. Thanks


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    I'll have a look though my threads mate I asked the same question and am sure frim sent a chart or link

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    Johnathan

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    Senior Member Rank = Grand Champion Ajm's Avatar
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    Cant find the one I was thinking about but this one is about 2inch flow rates https://r.tapatalk.com/shareLink/top...ink_source=app

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    Johnathan

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  7. #5
    Quote Originally Posted by Ajm View Post
    Cant find the one I was thinking about but this one is about 2inch flow rates https://r.tapatalk.com/shareLink/top...ink_source=app

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    Lovely cheers ajm so looks like 15000 litres a hour. That’s more than I expected actually.


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  8. #6
    Quote Originally Posted by freddyboy View Post
    Struggling to read the top line on that fred I’m asuming it’s the green column? Cheers bud!


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    Senior Member Rank = Gosai Alburglar's Avatar
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    I think this has every possible 4 inch /110mm scenario covered.
    3600 seconds in an hour so times by 3600 for lph. So, when mature, a 110mm bottom drain on a 5 degree gradient can flow a maximum of 77,760 litres per hour of dirty water.
    Last edited by Alburglar; 17-02-2020 at 12:06 PM.
    Ki Matsuba, Hikari Moyo, Beni Kikokuryu, Hariwake, 99% Shiro Bekko, Yotsujiro & Doitsu Aka Bekko.

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  11. #8
    Quote Originally Posted by Alburglar View Post
    I think this has every possible 4 inch /110mm scenario covered.
    3600 seconds in an hour so times by 3600 for lph. So, when mature, a 110mm bottom drain on a 5 degree gradient can flow a maximum of 77,760 litres per hour of dirty water.
    Lovely cheers mate


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  13. #9
    Senior Member Rank = Yonsai RipleyRich's Avatar
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    It will be affected by length and any fittings, especially changes of direction.

    I run mine in 3" with the last 2 feet in 2" to increase velocity.

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