Viega 90870 MegaPress reducer Smart Connect technology 316 stainless steel, 1-1/4'' x 1''

The 90870 is a 1-1/4 inch by 1 inch reducing fitting, so it takes 1-1/4 inch pipe on the large end and 1 inch on the small end. Both ends are press connections (P1 x P2), not threaded and not grooved, so your pipe ends need to be cut square, deburred and clean before pressing.

It is 316 stainless steel throughout. That matters because MegaPress is also made in carbon steel for black iron pipe; the 316 version is the one to use on stainless pipe systems and where corrosion resistance is the reason for the material choice. Mixing it onto carbon steel pipe is a material pairing decision you should make deliberately, not by accident.

Smart Connect is Viega's feature that leaves an unpressed fitting deliberately leaky, so when the system is pressure tested an unpressed joint shows itself immediately instead of hiding behind a dry seal. On a job with a lot of 1-1/4 inch and 1 inch branches it is how you catch a missed press before the ceiling closes up.

The fitting itself measures 4.433 inches long by 2.205 inches wide and 2.205 inches high, and weighs 0.789 lbs. Plan clearance beyond that for the press tool jaw to seat squarely on each end, which is usually the limiting factor rather than the fitting body in a chase or against a joist.

No. Both ends are press, so the connection is made cold with a press tool, no threading, no welding, no flame. For a contractor that is the whole point of specifying MegaPress on an occupied building or anywhere a hot work permit would otherwise be needed.

The part number is Viega 90870, and it is made in Germany. That MPN is what to quote on a submittal or a reorder so you get 316 stainless rather than the carbon steel equivalent in the same size.