G.A. Murdock's Mur-lok™ polypropylene fittings and Mur-lok™ LLDPE tubing are now NSF 58 Component Certified. This certification ensures that products meet the standards for the drinking water industry through both structural and material testing. It also allows certified components to be easily incorporated into any NSF 58 certified drinking water system with minimal paperwork and minimal, if any, re-testing.