Double containment piping system made from PVC, chlorinated polyvinyl chloride, polypropylene, high density polyethylene, polyvinylidene fluoride and ethylene chlorotrifluoroethylene for the control, containment and transport of high purity and reverse osmosis deionized water, corrosive and abrasive fluids and corrosive and volatile fumes, namely, non-metal rigid pipes for containing and transporting liquids and fumes and non-metal fittings for rigid pipes in the nature of tees, elbows, reduc...