Python compression fitting assemblies are made of solid brass construction and, can be applied in the field without the use of special tools.
ChillWaves Brass Compression Tube Fitting, 1/2 OD x 1/2 OD
JUWO Brass Compression Tube Fitting, 1/2 × 1/2 Compression Union for Copper, Fuel and Brake Line Connections : Industrial & Scientific
Proline Series 5/8-in x 1/2-in Compression Coupling Fitting in the Brass Fittings department at
Reusable Air Hose Fitting, Fitting Assembly, 3/8 x 1/2
Compression Fittings Union Couplings – Reliable Fluid Systems
images.thdstatic.com/productImages/74dd51b3-baf8-4
Everbilt 1/2 in. x 3/8 in. Female OD Compression Brass Reducing Coupling Fitting 800899 - The Home Depot
Tube / Double Ferrule Fittings - CHUAN KOK
Sioux Chief 1/2 inch x 3/8 inch Brass Female Compression x