Install the gutter and run your 1 5 downspout with 90 degree or 45 degree depending on your configuration.
How to make pvc gutters.
The narrow strip is then cut into lengths and used to strap the gutter in position.
Then cut the top 1 3 to 1 2 of top of the pipe off.
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A downspout would be very simple to make as well just simply glue in two end caps and a 3 x3 x1 5 tee to your 3 pvc pipe.
In my wife s village near madang papua new guinea they always use pvc pipe for guttering on corrugated iron roofs.
Pvc rain gutters diy out of a 3 pvc pipe cut in half with a table saw and then screwed to the eve using steel hex nut screws how to do it yourself find this pin and more on scraptastic saturdays by scrapality.