We use cctv cameras on each drain clearance to check your drains are in total working order. I have to admit, i had no idea about the soda i had to chuckle to myself, because if it can do all that to a drain, what on earth is it doing to my stomach. Blocked stroud toilets and blocked stroud showers. Local authority approved watermains & drainage contractors. As of 2010 all domestic boiler installations should be at least 88% efficient,.