Emere akpa mmamịrị site na PVC, PE, PP, HDEP na ABS na ọkwa ahụike.Ọ mejupụtara akpa, njikọ tube, taper njikọ, ala ntinye na aka.
1.With valvụ na-adịghị alaghachi azụ iji zere nkwụsị azụ nke mmamịrị, na-abawanye nchekwa ndị ọrịa
2. Tube na-eji nwayọọ elu na kink na-eguzogide