Should the property be replaced with cast iron pipes?

Cast iron pipes should be replaced for the following two reasons:

1. service life of pipeline: the service life of cast iron pipeline is about 50 years. If the pipeline has exceeded or approached this service life, it is recommended to replace it.

2. Pipeline condition: Cast iron pipeline is easy to rust and corrode, and corrosion will lead to the thinning of pipeline wall thickness, thus reducing the bearing capacity of the pipeline.