Knowing how to make an air tight piston for use in PVC pipe is useful for so many projects that I decided I should have a single video that can be referenced about how to make them. Using 1 1/4" PVC fittings you can make a piston for 2" pipe, with 3" fittings a piston can be made for 4" pipe, and though I did not mention it in the video, a piston for 1" pipe can be made using 3/4" fittings. I'll be putting these to use quite soon in upcoming projects.

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