... valve(normal),Stop valve(over-and-under type),Water separator ,Flange model ripple compensator),Plastic reparing joint ... Equipment Series 7.PE components for Water treatment system The pipe fittings applications: Water supply, industrial liquids transportation and sewage ... PE fittings /HDPE fittings/PE pipe fittings accessories /Polyethylene Pipe/Stainless steel fittings--for water supply and gas