If your house is modern or new, then the pipe work should be fine. However, if you are buy an old property, it is absolutely vital that you check what type of pipe work is in the property. If it has gun barrel pipework or lead piping, this will have to be replaced and the cost of replacement will be huge. So our advice to anyone purchasing an old house is simple, get a qualified and insured plumber out to inspect the interior pipes otherwise if could be very costly afterwards.