Many people will reach for an aquarium pump, after all that represents ... is a length of pipe with a disc of flat PVC glued to its end, and the piston is fabricated from a short piece of the ...

PVC air cannons are great, and everyone should build one of these at some point in their life, but what really makes this build exceptional is the valve. [Ben] created a piston valve for this ...

The developmental objective for the diaphragm metering pump was ambitious: the result is a solution for medium-sized requirements on ...