Viega 20728 ProPress coupling With stop Smart Connect technology Copper, 2-1/2'' x 2-1/2''

The Viega 20728 is a 2-1/2 inch by 2-1/2 inch ProPress coupling, so it joins two runs of 2-1/2 inch copper tube in a straight line. Both ends are press ends (P1 x P2), not sweat or threaded, so the pipe ends go in dry and get crimped with a press tool and the matching 2-1/2 inch jaw or ring.

With stop means there is a formed ridge in the middle of the coupling body. Each tube end butts against it, which sets insertion depth for you and guarantees both ends are seated before you press. That is what you want on a normal straight joint. A stopless (no-stop) coupling leaves the bore open so the fitting can slide fully onto one pipe, which is how you repair a cut section or close a run between two fixed pipes that cannot be sprung apart. The 20728 is the with-stop version, so it is not the one for a slip repair.

Copper. The 20728 is a copper press fitting for copper tubing systems, so it belongs on copper water lines rather than on carbon steel or stainless press systems, which use different fitting alloys and seals.

Yes. At 2-1/2 inches you are past standard jaw sizes, so the joint is made with a press ring and an adapter rather than a small jaw that clamps directly. Budget for the 2-1/2 inch ring and actuator on the job, since the fitting itself ships as just the coupling with no tooling included.

Smart Connect is the feature Viega builds into the sealing element so an unpressed fitting leaks visibly during pressure test instead of passing quietly. On a 2-1/2 inch riser or main with dozens of joints, that is how you find the one connection a crew missed before the walls close.

Made in USA, which matters on public and institutional jobs carrying domestic-sourcing language in the spec. Shipping weight on the coupling is 1.21 lbs each, useful when you are pricing out freight on a bulk riser order.