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Solar Pool Heating System -- Installation & User Manual
© Copyright 2020 Optex Solar Pty Ltd. All rights strictly reserved.
Page 10
7.3
Filter Pump Sizing for Manual Systems
8
Solar Line PVC Pipe Sizing Guide
The table below will help you choose the correct size PVC pipe for the solar lines running
to and from your roof
.
On
the roof,
we generally recommend 32 PVC (DN30), except for larger multiple row arrays with a secondary header
pipe feeding each row, for which you should use 40 PVC (DN40). Coming down the roof the pipe size can then be
adapted to the pipe size you have for your solar line ground run i.e. 40 PVC (DN40) or 50 PVC (DN50).
Recommended PVC Piping Sizing for Solar Pool Heating System Lines
Anticipated Flow Rate
Absolute Minimum
Ideal PVC Pipe Size
Maximum Pipe Size
70 Litres/min
20 PVC (DN20)
25 PVC (DN25)
32 PVC (DN30)
120 Litres/min
25 PVC (DN25)
32 PVC (DN30)
40 PVC (DN40)
200 Litres/min
32 PVC (DN30)
40 PVC (DN40)
50 PVC (DN50)
250 Litres/min
40 PVC (DN40)
50 PVC (DN50)
65 PVC (DN65)
400 Litres/min
50 PVC (DN50)
65 PVC (DN65)
80 PVC (DN80)
880 Litres/min
80 PVC (DN80)
100 PVC (DN100)
125 PVC (DN125)
For manual type systems
running off the main pool filter pump, please check that the
filter pump is large enough to accommodate the extra load of supplying water to the
collectors at the required pump a 1 meter pressure drop across the collector
array.
Why?
Filter pumps are geared for flow not pump height, solar pumps are geared
specifically for roof solar applications.
If the distance from the pool to the roof collector area is more than 10m we recommend
you use the next size up PVC pipe.
