To Make Connection, Place The Nut And Then The Sleeve Over The Tubing And Then Insert Tube Into The Fitting Body.
Compression Unions Are Used In Low Pressure Application Such As: Air, Oil, And Water. Brass compression union, 1/4, 100/box Use For Joining 1/4" Copper, Brass, Or Aluminum Tubing In Low-Pressure Applications (Not Brake Lines). They Are Generally Used To Connect Lengths Of Copper, Brass, And Aluminum Tubing. When Tight, The Wedging Action Of Sleeve Between Body And Nut Create A Leak Free Connection.