Viega 95100 MegaPress 45° street elbow Smart Connect technology 304 stainless steel, 2'' x 2''

P x FTG means one end is a press socket that receives 2 inch pipe, and the other end is a fitting-takeoff (street) end sized to slip into another 2 inch press fitting socket. That is what makes it a street elbow: you get a 45 degree change of direction without adding a short nipple between two fittings. Both ends are 2 inch, so it works in a 2 inch run.

No. The 95100 is a MegaPress fitting, which is the press system for iron pipe sizes, and the 2 inch press socket is built to seal on 2 inch IPS pipe. For copper tube you need a ProPress copper or stainless fitting instead. Putting a MegaPress fitting on copper will not give you a sealed press joint.

The 95100 body is 304 stainless steel, which is the version used where the carbon steel MegaPress body would corrode or where the media does not suit black iron, for example wet or washdown mechanical rooms and certain process lines. On ordinary black iron gas or hydronic pipe runs the carbon steel MegaPress elbow is the normal pick. Both press onto the same IPS pipe, so the decision is about the service, not the fit.

Smart Connect is the feature in the sealing element that leaves an unpressed joint deliberately leaking during pressure test, so you can find any connection you missed before the system is closed up. It does not replace pressing. Every 2 inch socket on the 95100 still has to be pressed with the correct 2 inch MegaPress jaw or ring.

No threading, no welding, no flame. The 95100 is a press fitting: cut the 2 inch pipe, deburr, mark the insertion depth, seat the pipe fully in the press socket and press with a 2 inch MegaPress jaw. That is why crews use it for retrofit work in occupied buildings where hot work permits are a problem.

A street elbow has one press socket and one fitting-takeoff end, so it plugs straight into the socket of another fitting without a cut nipple between them. That saves a joint, a press cycle and roughly a pipe length of space, which matters when you are offsetting around a beam or a duct in a tight ceiling. Use two socket-end 45s only when there is pipe between them anyway.