... .2. We can provide various of single/double Union valves, check valves, membrane valves, bottom ... ABS, U-PVC, C-PVC, PP-R, PE, PE-RT, POM and other material.3. We can ... of ABS, U-PVC, C-PVC, PP-R, PE, PE-RT, POM and other material. Form as thread, ... long, excellent, chemical, pressure, traditional, easy clean, single , double, vertial, horizontal, perfect, small, big, thinkness, inch, structure, ...