Ok so, we bought a house almost 2 years ago and have found many of the previous owner's bodge jobs. The biggest one is that our Utility room has been built on top of the main sewer line of our row of houses (from what I can gather, it's been there at least 10 years, possibly nearer 15) and the main drainage for the Utility room is actually a soak-away. Doesn't work so well when the dishwasher and washing machine are on the go! So, my questions are: 1) Are Welsh Water (I'm in England but Welsh Water are in charge) going to make me pull the room down if I point this out to them? 2) If I was to install an inspection point in my utility room would it prevent the above? 3) Is this a job I can fix myself? I'm a competent DIY plumber and can't seem to find anyone to do the bloody job, I think I should be able to do it myself... assuming I don't get overwhelmed by the smell! Any advice would be gratefully received!