https://www.solarpumpfactory.net/product/sewage-pump/zw-series-non-clogging-selfpriming-sewage-pump/ ZW type non-blocking self-priming sewage pump integrates self-priming and non-blocking sewage discharge. It can suck the dirt containing large solid blocks, long fibers, sediment waste ore impurities, feces like the general clean water self-priming pump. Treatment and all engineering sewage. Strong self-priming ability, easy to use, easy to install, stable and safe performance, small workload and convenient maintenance.