Pipe Size VS PUMP

Pool pumps, pool filters and the plumbing of
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chunkayng
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Pipe Size VS PUMP

Postby chunkayng » Thu 20 Dec, 2018 11:31

Hi,

I have a question about learning about the pool system

If the Maximum Flow Rate for 2 inches PVC pipe is only 45GPM and i only use 2" pipe for my pool
Am i right to say that the maximum GPM for my pool system can achieve is only 45GPM even if i use high HP PUMP and the Total Dynamic Head is Zero.


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Larry
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Re: Pipe Size VS PUMP

Postby Larry » Fri 21 Dec, 2018 03:26

The maximum flow rate of PVC piping depends on the speed of the flow. A discharge line has a much higher flow rate compared to the same diameter suction line.
Then you need to take into account the flow loss due to fittings and length of pipe.
I have attached the table we use as a base reference for pipe size / flow rate calculations. It is on the conservative side - we are happy to overdue rather than underdo the piping.
boru hesaplama.pdf
(137.56 KiB) Downloaded 15 times
Teapot
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My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
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Re: Pipe Size VS PUMP

Postby Teapot » Fri 21 Dec, 2018 05:05

We can also consider the flow rate through the filter. Then also the multi port valve. Both of these items put a bigger load than ever the pipe does. Pool companies make big pumps to overcome the problems they build into the rest of the equipment they make.

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