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Old 11-14-2012, 07:45 PM   #1
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Needing to calculate how much water I should account for to drain 40' of 2" pipe, I haven't found a formula yet. There are no cutoffs between cold water/steam units that have bad valves. This "house" is a nightmare lol 8)


Trying to replace valves that failed and were bypassed, designated cold water pumps are fed from heat exchangers, three pipe to four pipe...omg I'm too green for this!!!

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Old 11-14-2012, 08:07 PM   #2
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What we need is a math genius-----flying guess? About 3 buckets full----let's see that a mathematician has to say---

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Old 11-14-2012, 08:15 PM   #3
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A little over 6.5 gallons
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Old 11-14-2012, 08:36 PM   #4
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I'd take an evilt genius with a floating cork at this point
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Old 11-14-2012, 08:37 PM   #5
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Thanks canucker, do you have the formula handy?
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Old 11-14-2012, 08:43 PM   #6
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there is 231 cubic inches in a gallon
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Old 11-14-2012, 08:43 PM   #7
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Volume of a cylinder is pi*r(squared) * height (or, in this case, length).

So, for a 2" diameter pipe, the volume would be 3.14 * 1 * 480 = 1507 cubic inches = 6.5 gallons.

For unit conversion, Google is your friend. Just google "1507 cubic inches in gallons" and it'll spit out an answer.
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Old 11-14-2012, 08:45 PM   #8
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volume of a sphere is pi (3.14) r squared times height or length
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Old 11-14-2012, 08:58 PM   #9
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My phone shows no posts by me, but I appreciate everyone!!!!

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