Viega Pex Press 83071 1-1/4"x3/4" Reducer. Some of the improved features of using PEX Press include colored coded rings and the attached sleeve that allow you to visually see a correct and secure finish. Also PexPress fittings do require a single tool for connection. This Viega Pex Press 83071 1-1/4"x3/4" Reducer is designed to connect two lines of different sizes. The reduction in the pex tubing allows pressure to build and to be delivered more effectively.