Universal Nut Lock Swivel Tee, 3/4" FPT Swivel X 1/2" Poly

If you're on this page you probably already know that there are three sizes of tubing all referred to as "half inch," and that you need different fittings for each size. It's needlessly confusing and a right pain to deal with if you find yourself needing to connect two different sizes of 1/2" tubing. If that sounds like you, look no further than the Universal Nut Lock fittings from DIG. These fittings will work with all three sizes of 1/2" tubing: .700 OD, .710 OD, and .620 OD. Whether you know you have mismatched sizes of tubing or you're just not sure which size you have, a universal nut lock fitting is a safe bet.

NOTE: If you get a fitting that looks mostly like the picture but not exactly, then it's the new style, and it works differently than the old one! To use this new style of fitting, screw the nut all the way down against the base of the fitting, push the tubing onto the barb, then screw the nut back down over the tubing. Do not unscrew the nut and push the tubing through it, that's not the way the fitting is designed to work!