"OATEY COMPANY" PURPLE PRIMER * 4 OZ Purple Primer. * For Use On PVC & CPVC Pipe & Fittings. * All Schedules & Diameters. * For Use Where Code Calls For Primer Verification. * Exceeds ASTM F-656. * NSF Certified. *Purple-tinted aggressive primer for use on PVC and CPVC pipe and fittings.