A rat blocker should be installed in a sewer line, well or inspection chamber. The rat blocker is made in acid-proof stainless steel and consists of two flaps and a body. The flaps open when the rear flap is affected by the water flow. The product can be installed in both the inlet or outlet side. Our basic package consists of a rat blocker, a mounting grip and a mounting rod. The mounting rod is build in modules, which makes it possible to extend the rod to the needed length.