Lateral drain - a lateral drain is the part of your private drain that lies outside of your property boundary/curtilage under public land (the highway, footpaths, verges) or private land. To view business statistics, receive messages from prospective customers, and respond to reviews. Whoops! something went wrong please refresh the page and try again. A malfunctioning boiler can have a huge impact on the heating of your home it can affect anything from the efficiency of your.