By coincidence I was at my daughters flat yesterday during the visit of a local drain clearing company.
Her flat is in a conversion of a Victorian house.
The basement flat had their kitchen sink overflow due to other flats washing machine pumping out etc ( but no foul water ).
It was a bit of a challenge to sort it out but he did a good job and it was interesting to watch the camera view on the screen.
The very original build was a bodge. The rain water pipe was teed into the sufrace water sewer somewhere under the side walk No intercept and no rodding eye.
The flat conversion was also done on the cheap so the pipe from the basement sink also joined the rainwater pipe somewhere under the side walk.
When, after several different attacks, the blockage was finally shifted a vast amount of black compost was flushing down for quite a few minutes.
It was not the expected, by me, dried washing powder and animal fat that I was expecting.
IMO the blockage had been slowly getting worse for years. The cause seemed to be moss off the roof accumulating in the pipe.
The visit cost less than £150 which I thought was quite reasonable and a lot less than a well known day glow firm.
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