Apollo 3/8 in. Brass PEX-B Barb x 1/2 in. Male Pipe Thread Reducing Adapter APXMA3812 - The Home Depot
30 pieces) 1/2" Brass PEX Fittings for 1/2 inch PEX Pipe (10 - Elbow, 10 -TEE, 10 - Coupler/Straights) Kit for Domestic Water and Radiant Heating, DZR and No-Lead Brass Crimp Cinch System PEX GUY