The Rat Blocker is an environmentally friendly system designed specifically to prevent rats from entering houses and commercial buildings through the drainage system and sewer pipes. By installing the Rat Blocker, the pipes are also protected from damage caused by rats. Rats that are already inside the drainage pipes or sewer system can get out without a problem but cannot return into the system. Install rat blocker and get a permanent solution for the rats in drainage from sewers pipes. Call MR Drains Today!