Agri Drain rat guards are installed on the ends of sewer and PVC pipes to prevent rats from entering them. The guards have a swinging door made of steel bars that only opens one way; rats are allowed to leave the pipe, but not enter. The rat guards come in many sizes and a few different styles, each of which attaches to a pipe with bolts. Agri Drain rat guards must be positioned far enough into the pipe so when rats exit, outside obstacles such as garbage dumpsters don't interfere with the steel bars.
Position the rat guard at the end of the pipe. Align the rat guard so it is vertically level to the ground. When it swings open, the rat guard should not be obstructed by any obstacles.
Mark the location of the mounting hole with a pencil. Remove the rat guard from the pipe.
Drill a hole into the pencil mark using a drill bit large enough to penetrate the surface of the pipe.
Align the mounting hole on the rat guard with the drilled hole in the pipe.
Insert the supplied bolt into the hole. Tighten a nut onto the bolt using an adjustable wrench.
Insert the rat guard over the end of the pipe.
Adjust the rat guard so the steel gate opens upward. The gap should be at the bottom of the pipe.
Tighten the bolt on the side of the rat guard and the bolt at the top of the rat guard until it is secured around the pipe.