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Step 3Piston plug
One of the biggest tricks with this design was figuring out how to quickly and easily seal the end of the 1-inch PVC piston without adding something that was bigger than the pipe itself. The answer was to shave down a 3/4" PVC plug.
This plug is kind of an oddball fitting, so you may have to search a bit for these. They are the same outside diameter as 3/4-inch PVC.
Use a utility knife to carefully shave down the plug so it will fit into the 1" pipe. PVC cement will act as a lubricant to help get the plug in place. Drill a hole in the end of the plug that will tightly fit the screw which will hold the washers in place.
This plug is kind of an oddball fitting, so you may have to search a bit for these. They are the same outside diameter as 3/4-inch PVC.
Use a utility knife to carefully shave down the plug so it will fit into the 1" pipe. PVC cement will act as a lubricant to help get the plug in place. Drill a hole in the end of the plug that will tightly fit the screw which will hold the washers in place.
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