SUBSTITUTE TRADITIONAL CAST-IRON PIPE,STEEL PIPE TO SAVE ENERGY.HEALTHY WATER,NO SECONDATY POLLUTION.LITTLE RESISTANCE OF LIQUID,HIGH EFFICIENCY OF TRANSMISSION.LIGHT WEIGHT,CONVENIENT FOR INSTALLATION AND MAINTENANCE,RELIABLE PROPERTY.HITH ENDURANCE OF PRESSURE,GOOD PROPERTY OF SEALING,LONG USING LIFE AND CAN REACH 50 YEARS IN NORMAL USE, ISO4422-2:1996 CERITIFACTION.

.