1/2" Brass Barb Insert x 1/4" OD, Lead Free, Needle Valve Drain Valve, Use With True Value #608-933 Cinch Clamps, Need Cinch Tool True Value #608-743 Or Copper Crimp Rings On Cross Link Polyethylene Pex Tubing, After Crimping You Can Test Each Fitting To Well Over 100 PSI, NSF Listed Brass Inserts, ASTM F-876, ASTM F-877 To SDR-9 Dimensional Standards, NSF 14 & 61 For Use In Potable Water Systems, CSA B137.5 Standards, NSF CL-R Certified For Use In Hot Water Systems Where Chlorinated 140 Degree Fahrenheit Hot Water Can Be Constantly Re-Circulated, The Wetted Surface Of This Product Contacted By Consumable Water Contains Less Than 1/4 Of 1 Percent, 0.25%, Of Lead By Weight, Meets AB1953 California & VT S152 Vermont Low Lead Restrictions.