... ,ANSI as your requirement Diameter:20mm-400mm(1/2"-16") UPVC pipe fitting Range of Size DN20-DN400StandardDIN ,BS ,ANSI,Connecttype Socket ... result in lower pressure loss and higher volume than metal pipes; Long Life: more than 50 years under normal conditions; Recycled ... water head loss, 30% more flow volume than cast iron pipes of the same diameter; Good sealing performance.