3/4 x 1/2 Lead Free Brass Barb Insert Elbow, For Connecting 3/4 & 1/2 Cross Link Polyethylene Pex Tubing At A 90 Degree Angle, Secure Barb End Of Fitting To 3/4 Pex Pipe, Secure The 3/4 Barb End Of Fitting To Pex Pipe With TV #608-826 Cinch Clamps & TV #608-743 Cinch Tool, Or Copper Crimp Rings & Crimp Tool, Secure 1/2 Barb End Of Fitting To 1/2 Pex Pipe With TV #608-933 Cinch Clamps & TV #608-743 Cinch Tool, Or Copper Crimp Rings Immediately Testable To Well Over 100 PSI, Meets The New NSF/ANSI Standard 14-2009 & ASTM F 1807-9SI Standard For Products Intended For The Transport Of Potable Water, ANSI/NSF Standard 61 Annex G For Lead Free Compliance & The Wetted Surface Of This Product Contacted By Consumable Water Contains Less Than 0.25% Of Lead By Weight To Meet AB1953 California & VT S152 Vermont Low Lead Restrictions.