Are PE pistons better than rubber pistons?
Pistons can be made out of many different materials and the most effective seems rubber from car tire and HDPE ( High Density Poly Ethylene). Rubber pistons can be made with a simple punch or even scissors. The advantage of rubber pistons is that car tires are available everywhere. The piston size can easily be adapted to the often varying inside diameters of the local PVC pipes. Rubber pistons have less friction in water with sand particles, which makes it also very useful to clean and develop a recently drilled borehole.
