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Step 6The Bellows
The piston pump is made from two sections of water pipe and some wooden piston plungers.
The gasket material is very soft and hangs down on the upstroke, allowing air to pass around it.
It looks like these gaskets are made of soft foam. I've also seen them made from many layers of woven plastic bags.
The gasket material is very soft and hangs down on the upstroke, allowing air to pass around it.
It looks like these gaskets are made of soft foam. I've also seen them made from many layers of woven plastic bags.
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