Meteran Air 3 Inch DN 80 Flange End PN16 Flow Meter 3 inch Water Meter 3" Water Flow Meter WNH Water Meter 3 Inch WNH Meteran Air Flow Meter WATER METER FLANGE END WNH 3" inch Meteran Flow Air PAM PDAM Flange End PN 16 LXLC-80E