2011 Best Steady ppr check valve green With German Standard Green, gray,blue.etc Standard:DIN 8077/ ... 8078 OEM acceptable 2011 Best Steady ppr check valve green With German Standard1, raw material: ppr and brass2, pressure ... rating:2.5mpa3, color: white, green, grey, blue4, size:20mm to 32mm5, sanitary,healthy, ... welcomed. 2011 Best Steady ppr check valve green With German Standard