My washing machine flooded the kitchen and the next room. The water from the kitchen is pumped out to a vertical pipe, which then slopes to join the bathroom waste water and leads to the septic tank and the water is pumped deep underground to a Spoke System at the far end of the garden. I phoned HSL who sent an engineer the next day and he found the pump inside the house had broken. He replaced it and flushed out all the water after adjusting the pump's action. A week later, the flooding happened again. HSL were very helpful when I contacted them and suggested I got a Drain firm to check the system outside, and they found no leaks but detected roots in two places and advised a visit from the Slurry services. Wet wipes that a visitor used had caught on the roots and blocked the entrance to the final tank. HSL were in contact frequently and the two people who organised the work of the engineers discussed the problems with me as they occurred, and while I was considering finding a new bigger box for the indoor pump, they advised me to have the drainage assessed and the system emptied and then reconsider it. As no problems occurred I did not ask them to find a bigger box. They were helpful, sympathetic, and patient with my queries on the phone, and kept me informed of each stage in the proceedings.