Beduan Push to Connect Fitting Elbow, 1/2" Tube OD x 1/2" NPT Male 90 Degree Elbow Adapter 304 Stainless Steel Air Union Fitting: Amazon.com: Industrial & Scientific
MECCANIXITY 90 Degrees Elbow Copper Pipe Fitting Brazing Connection 1/4 Inch ID for HVAC Cooling Equipment, Pack of 8 - Amazon.com
1/8" 1/4" 3/8" 1/2" Female x Male Thread 90 Deg Brass Elbow Pipe Fitting Connector Coupler For Water Fuel Copper - AliExpress