To assist with proper sizing of PEX, PE-RT and CPVC plastic pressure pipe and tubing, the BCD Plastic Pressure Pipe Design Calculator is designed for hydronic heating and cooling, snow and ice melting, plumbing, fire protection and geothermal applications. Developed by PPI’s Building & Construction Division (BCD), this free online tool performs calculations for pressure and head loss, thermal expansion and contraction, surge pressures, plus pipe weight and volume. It can even help designers determine the lengths of expansion arms or loops, especially important for larger diameter piping systems. Users can select the pipe type, size and length; flow rate; fluid characteristics such as temperature and antifreeze content; add in fittings; and calculate results. Calculation details may be shown and results can be printed or emailed. Plastics Pipe Institute.