Not my photo but I have one of these under my driveway, my house is one of a pair of semi's. It blocks up completely every 6 weeks ish. The builder who built my house was absolutely useless (no building regs, he fitted all the gas, electric and windows himself without the proper certification etc, a whole other story), so basically I want to know what would cause this to consistently block up so frequently, has the pipework been laid at the wrong angle etc?
My new solicitor is taking my old solicitor to court because they oversaw the purchase of this house and didn't notice that absolutely nothing had building regs. The old solicitor has admitted fault and "should" be giving me a payout to get everything fixed. So should I be adding improper fitment of waste pipes to the list to be checked out? If so how would I go about checking something like this as it's all underground? Obviously there is an inspection cover over the junction but the rest of the pipework is under the house and driveway.