Q&A for How to Calculate Water Pump Horsepower

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Are you working in IGPM or USGPM ?

wikiHow Staff Editor
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This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.

wikiHow Staff Editor

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For these equations, we're working US Gallons per Minute, and all measurements are in imperial units.

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How do I find the flow rate of my water pump?

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This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.

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Empty the secondary tank and time how long it takes to fill. The time divided by the seconds it takes to fill the tank is your flow rate.

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Question

How much horsepower is needed to pump water at a height of 1 km?

Wildman5311

Community Answer

How many people are in your house? It depends on how much water you will need to pump.

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Question

What is the best water pump and horsepower for a 15 foot deep well?

Community Answer

There is no one answer to this. It depends on your requirements -- the amount of water you would need in a minute,an hour or a day.

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Question

How do I calculate the economic diameter of a pipe and the loss due to friction related to the diameter of the pipe?

Community Answer

You can calculate economic diameter of a pipe using friction loss chart based on flow and velocity. Diameter is related to friction due to the factor of how much area of water is in contact with pipe. We know that as the diameter of the pipe increases, loss due to friction also increases; the bigger the diameter, the larger the area of contact. Hence, more friction loss.

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Question

How much horsepower is needed to pump water to a community when it's a long distance?

Community Answer

It depends on: Output discharge Q (in); water eequired (GPM); and what is the depth of the water?

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Question

What's the best water pump to use to lift water up?

Community Answer

It depends on the depth of the water source. If it is deep, you may need a submersible deep well pump; if not, a shallow-well type centrifugal pump will do.

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Question

How do I calculate horsepower for a motor?

Community Answer

This is already explained with a sample on the above article: bhp = GPM x H x Sp.Gr. divided by the product of 3960 and pump efficiency.

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Question

How do I find the gpm of a centrifugal pump?

Community Answer

GPM = TR × 24 ÷ ∆T ... (where T1 is the water inlet temperature and T2 water oulet temperature). TR = ton of refrigeration.

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Question

How much horsepower for a centrifugal pump is good for a total dynamic height of 45 feet, if the family consists of 10 members, and UGt is 2000 litres and OHT is 1000 litres?

Community Answer

A 0.5 hp pump is sufficient.You need 2000 LTR water in a day, for which this self priming pump with 0.5hp capacity is sufficient.

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