The investigation of a series of minor floods at our new home revealed what at first glance were stones in the drainage system from the kitchen and utility room. I later revised my opinion to mortar and then possible grout. They look like small lumps of grey mortar but is quite friable.
On discussing this with my plumber he suggested that they are fatbergs and possibly related to the way the previous occupier used the drainage system, the way the system is set up internally and that washing powder may have exacerbated the problem.
I am struggling to find a solution online to how to dissolve these lumps without dismantlng the whole system. Fat will dissolve in alkali so I have put some diluted caustic down various orifices and run a mild solution through the washing machine. But is that enough? Would any other chemicals (maybe a mild acid like cheap cola) work?
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Fatberg in domestic environment new
Fatberg in domestic environment new