| Shipping | Tax | Terms Shopping Cart 0 Items Request for Quote 0 Items All Categories > Kaeser Products > Compressed Air Piping > 3/4 to 2-1/2 Inch (in) Nominal Diameter Aluminum Compressed Air Equal Unions > Advanced Search Advanced Search in 3/4 to 2-1/2 Inch (in) Nominal Diameter Aluminum Compressed Air Equal Unions Enter at least one criteria to search items. Nominal Diameter (in) No Preference 1 1-1/2 2 2-1/2 3/4 Outside Diameter (in) No Preference 3/4 1 1-9/16 2 2-1/2 Outside Diameter (mm) No Preference 20.1 25.1 40.1 50.1 63.1 Inside Diameter (in) No Preference 11/16 7/8 1-1/2 1-7/8 2-5/16 Inside Diameter (mm) No Preference 18 22.8 37.4 47 59.4 Wall Thickness (in) No Preference 1/16 3/64 5/64 Wall Thickness (mm) No Preference 1.0 1.1 1.3 1.5 1.8 Maintain Your Air Compressor Learn more about maintaining your air compressor by downloading our eBook on air compressor maintenance. Download eBook