... .scientific design,full sizes 4.Fast delivery Filter for check valve,stainless sleeve filterSpecifications:1.Stainless sleeve:302,304,etc2. ... and accessories.The production contains brass manifold,ball valve,filter,check valve,radiator valve,brass fitting,overlap-welded and butt-welded PE( ... PERT-AL-PERT composite pipe and fitting,PERT pipe,PPR pipe and fitting,and other accessories of water supply ...