Our 3/4" fittings work with our 3/4" poly tube which is a .820 I.D. x .940 O.D.

I.D. = Inside Diameter / O.D. = Outside Diameter

In 3/4" size we offer a compression and a Spin-Loc style.

The Spin-Loc is somewhat easier to install and an added feature is the ease of taking a fitting off if needed. Comes in handy more often than you might think!

In case you already have tubing the Spin-Loc style will work with tubing which has an I.D. of .790 to .845 and a wall thickness of .045 to .065. The compression style is spec'ed to work only with .940 O.D. tubing