2016-07-19
1, light weight, easy shippingPVC-u pipes for only steel and cast iron pipe 1/5, 1/3 of concrete. Pipe weighs about the same size, the same length of nodular cast iron pipe 1/4, 1/10 of concrete. Thus, convenient loading and unloading, reduces transportation costs 1/2-1/3. 1, no poison, no secondary