3/16 in. O.D. Comp x 1/4 in. MIP Brass Compression Adapter Fitting (5-Pack)

This LTWFITTING Compression tube fitting is made of brass for durable. And it connects to tubing on one end and has an NPT male connector on the

Adapter Brass Fittings at

Proline Series 5/8-in x 1/2-in Compression Coupling Fitting in the Brass Fittings department at

PlumbShop Brass Compression Union Tube, 5/16-in OD, 1-pk

PlumbShop Brass Compression Union Tube, 5/16-in OD, 1-pk

PlumbShop Brass Compression Fitting, 1/4-in MIP x 3/8-in OD, 1-pk

SIOUX CHIEF Hose Barb - Brass - 3/16 x 1/4 - Barb x MIP 903-41051001

LTWFITTING 3/16 in. I.D. Brass Hose Barb Splicer Fittings (10-Pack) HF39130310 - The Home Depot

PVF, Compression Fittings

The Plumber's Choice 3/4 in. x 3/4 in. 90-Degree PEX A x FIP Expansion Pex Adapter, Lead Free Brass for Use in Pex A-Tubing (Pack of 5) 5656XQGB-OM-5 - The Home Depot