Pipe|Sec ApS manufactures environmentally friendly Rat Blockers. A Rat Blocker from Pipe|Sec ApS is a device fitted directly into the sewer pipe through the cleaning well. The guard allows rats to pass from the house side but prevents them from returning to the nest – efficiently defending your house from rats. The Rat Blocker is made in acid-resistant stainless steel. The rubber seal on the outside of the device ensures that the Ratblocker fits snugly in the sewer pipe. A stainless steel spring mechanism ensures that the Ratblocker stays in place inside the sewer pipe. Pipe|Sec Rat Blockers are VA-approved (VA approval number 2.99/20348)