This product specification designates the requirements for Viega PureFlow® Press Polymer fittings with Smart Connect technology and attached stainless steel press sleeves with tool locator ring to be used as connections for Viega PureFlow® PEX, ViegaPEX Barrier, and FostaPEX tubing in3/8 in, 1/2 in, 3/4 in, 1 in, 1-1/4 in, 1-1/2 in and 2 in sizes as available. The connections are to be completed with the aid of a Viega PureFlow® Press Hand Tool or Viega PureFlow® Press Power Tool.