The new Viega PEX Press polymer fitting system is designed to provide a 40 percent increased flow rate compared to the U.S. standard PEX insert fitting. Viega PEX Press polymer fittings also feature the innovative Smart Connect feature, which helps installers easily identify unpressed connections. Viega PEX Press polymer fittings are manufactured with a smaller wall thickness than other PEX connection fittings yet maintain their superior characteristics.