We currently run tests on the clogging of our rat blocker TX11 universal Ø100/110 in our test center. The rat blocker is tested with a water amount of about 4 liters per flush, and the decline of the pipeline is 12%. At the same time, large quantities of materials are directed through the system. The purpose is to provoke a clogging, which can be subsequently dissolved again by repeated flushing. There may at times be flushes containing only water, as the test material can be stuck around the pump housing.