Product categories:
(1) pipe class: fast loading/welding elbow, tee, four-way, size head, U type pipe, etc
(2) the valve (fast loading/welding) butterfly valve, ball valve, diaphragm valve, check valve, duckbill valve, etc
(3) band class: clamp, and related accessories accessories
(4) cleaning equipment: fixed, rotating cleaning ball, filter,
(5) floor drain, breathing apparatus: various models to leak, breathing apparatus
(6 )sub categories: union, quick connect with the first class  landowners flange, in silk, silk, nut