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How to determine pipe size
It is important to use the appropriate size pipe for your flow rate. Using the correct size pipe will help keep friction low which will help to reduce pressure loss. Do not use a smaller size pipe diameter than is recommended. Although, It is ok to use a larger size pipe diameter. In certain instances sizing up can help to compensate for low pressure and or for very long pipe runs.
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Maximum Flow Rate |
Schedule 40 PVC |
4 |
8 |
13 |
22 |
30 |
50 |
Schedule 80 PVC |
3 |
6 |
11 |
20 |
26 |
46 |
Polyethelene
Drip Tubing |
4
240
(gph) |
8
480
(gph) |
13
780
(gph) |
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1/2" |
3/4" |
1" |
1 1/4" |
1 1/2" |
2" |
Find the pipe material you have chosen and flow rate that you have calculated.
At the bottom of the chart you will find the recommended pipe size. |
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