But the sales-like nature of this visit put me off could i save more elsewhere? Over the course of time, drainage systems are subject to a range of external problems that can cause damage and instability. Please drop us a line below and we'll get in touch with you shortly! Want to know how much you’re saving (or wasting) based solely on your boiler’s afue rating? then follow this pattern. Do you have urgent problems with blocked toilets and drains, hot.