Device for preventing further ingress of rodents such as rats into waste pipes feeds ultrasonic waves or light flashes into waste pipe downstream of U-bend section of waste pipe

摘要

The device is a generator (30) of ultrasonic waves or light flashes arranged so that the ultrasonic waves or light flashes can be fed into the waste pipe (16) downstream of the U-bend section (18) of the waste pipe. The generator of ultrasonic waves or light flashes is fixed to a section of pipe forming part of the waste pipe.