5pcs Pom Quick Water Tube Fittings 1/2inch Npt Female To 3/8inch Od 90 Degree Elbow Push Fit Connector For Ro Water System - Pipe Fittings - AliExpress
John Guest 1/2 in. OD Push-to-Connect Polypropylene 90-Degree Elbow Fitting (10-Pack) PP0316E - The Home Depot
Amazon.com: PL12-01 Push to Connect Fitting, 90 Degree Male Elbow, 12mm Tube OD x G1/8" Thread, Pneumatic Air Push Fit Lock Fitting (Pack of 10) : Industrial & Scientific
6mm x M 10 x 1 (conical) 90deg Elbow Push-in Fitting with Male Threads Brass NBRHigh Pressure [2 Pieces] | Tameson.com