I got rats in my flat via the toilet waste-pipe. They came up from the sewer and then ate a hole in the plastic pipe where it came out of the wall behind the bath.
Basically it was a nightmare. The bloke who came from Rentokil or wherever said it is a massive problem in London. The rats all live in the victorian sewers, which are like rat paradise, and usually come up into peoples houses in the summer. There is a sewer inspection chamber outside the front of the house and there is a sort of valve in it like a cat-flap, which allows dirty water to flow into the main sewer but is supposed to stop the little buggers going the other way. As soon as he saw where the rats were coming in in, he said "I bet the valve under that manhole is broken" and lo and behold, it was...
Sorry for the long post, but it would be as well to get it checked out. Your cat may hear something moving inside the pipe and be dropping massive hints for you !
Did you manage to get it sorted in the end? Coz I came home not long ago and found the waste pipe been chewed through, and it wasn't the cat this time because the door has been kept shut all day...
I got rats in my flat via the toilet waste-pipe. They came up from the sewer and then ate a hole in the plastic pipe where it came out of the wall behind the bath.
Basically it was a nightmare. The bloke who came from Rentokil or wherever said it is a massive problem in London. The rats all live in the victorian sewers, which are like rat paradise, and usually come up into peoples houses in the summer. There is a sewer inspection chamber outside the front of the house and there is a sort of valve in it like a cat-flap, which allows dirty water to flow into the main sewer but is supposed to stop the little buggers going the other way. As soon as he saw where the rats were coming in in, he said "I bet the valve under that manhole is broken" and lo and behold, it was...
Sorry for the long post, but it would be as well to get it checked out. Your cat may hear something moving inside the pipe and be dropping massive hints for you !