Pros choose ProPress because there are more fitting configurations approved for more applications than any other brand. Connections can be made wet or dry in 7 seconds or less on both copper and stainless steel pipe. VMS stocks Viega fittings in sizes ranging from 1/2” through 4” and in all available shapes including unions, changes of direction (bends, elbows), branches (tees), bushings, reducers, adapters, couplings etc., allowing for unlimited possibilities of connection.