In the construction of concrete pump pipe, the cleaning of concrete is an indispensable and important step after pumping. A good cleaning method can not only clean the conveying pipeline, but also transport all the helium in the pipeline to the pouring place, not only wasting no waste. And economical and environmentally friendly. There are three main types of water washing methods commonly used for S-tube valve concrete pumps, which are described below. 1. Direct watering method 1) Check the wear between the cutting ring and the eye plate, which