Weld-On 724 INDUSTRIAL GRADE ORANGE/GRAY: Heavy bodied, medium setting, low VOC CPVC cement for all classes and schedules with interference fit through 12" (315 mm) diameter. Premium, high-strength, chemical-resistant solvent cement for use with CPVC piping systems carrying acids, bases, salts, and hypochlorites. Ideal for use in waste water plants. May be used on PVC industrial piping systems for chemical applications. Approved for Corzan CPVC piping systems.