Drain Blocked under washing machine, Sewage was running under kitchen floorboards, jetted through as far as I could, Was told by customer no drain in back garden, but had to jet through manhole to unblock bad sewage build up
How on earth did they get permission for that extension over the manhole cover. Gross knowing that sewage flowing under the kitchen. With electricity next to water...a disaster waiting to happen
I'm unsure how "low water pressure" (mentioned by you around 23 minutes) affects how quickly the sewage flows... gradient of the sewer pipes perhaps...
WTH??!!??? Why..........why in the hell would you build over a manhole cover? Aren't there building codes people have to follow? How about some common sense? And there is an electrical line. All that wood floorboard, joists, wall board is contaminated with sewage and household waste. I can't even begin to imagine the stench on a hot, humid day.