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Thread: COR 20 - Plumbing size for tank bulkheads

  1. #1
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    COR 20 - Plumbing size for tank bulkheads

    Having my new tank built and will be using COR-20

    The tank is 220 gallons

    I am still unsure if I will use 2 COR-20 or one.

    Suggestions? If I run one, I was going to use 1.25" bulkheads and PVC, if I run two was going to use 1" bulkheads and 1" PVC

    If I go with 2, each will be on it own return.

    Thanks

  2. #2
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    1.25 gives a little bit more flow, but 1" is better overall since it doesnt require reducers to add a flow sensor. If you add a flow sensor, any extra flow realized by the 1.25" pipe is cancelled out by the extra losses from two reducers.

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  3. #3
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    Quote Originally Posted by zombie View Post
    1.25 gives a little bit more flow, but 1" is better overall since it doesnt require reducers to add a flow sensor. If you add a flow sensor, any extra flow realized by the 1.25" pipe is cancelled out by the extra losses from two reducers.

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    I will be using the1" flow sensor on both returns. Inside of the tank is 3/4 loc-line. So should I go with both pumps with 1 inch PVC and bulkheads

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    Quote Originally Posted by fishstix View Post
    I will be using the1" flow sensor on both returns. Inside of the tank is 3/4 loc-line. So should I go with both pumps with 1 inch PVC and bulkheads
    I would go 1 inch for sure in that case. If flow isn't where you want it after installing, I would target the locline first.

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  5. #5
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    Question in almost same situation:
    The use of 1,25”, with 2” flow sensor, would avoid losses.
    But much more expenses since 2” flow sensor ir US$ 99.
    Do you still recomends 1”?

  6. #6
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by Guilla View Post
    Question in almost same situation:
    The use of 1,25”, with 2” flow sensor, would avoid losses.
    But much more expenses since 2” flow sensor ir US$ 99.
    Do you still recomends 1”?
    I wouldn't think it would be worth the cost. A rough back of the envelope calc says the difference in flow will be about 10-15% between the two scenarios assuming typical 4ft rise, 4ft horizontal. The effect is less for higher elevation change and the effect is more for longer horizontal length. If you're pushing for every ounce of flow possible it will help.

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