12, Lead Free, Check Valve, Sharkbite Push Fit Fittings For Use With Copper Tubing, CPVC Pex With Integral Tube Liner Included, Constructed Of DZR Brass, Certified To 200 PSI 200 Degrees Fahrenheit, Design Certified To ASSE 1061NSF61 Standards, Meets UPC, IPC CUPC Requirements, Fitting Are Listed With IAPMO Are Certified For Use On Potable Hydronic Water Distribution, Certified For Underground Applications As A Manufactured Joint Without The Need For Access Panels, Lead Free Compliant To Federal Law 111380, Bagged