In most homes, the hot water pipes running from the hot water heater are one hundred percent bare and have no insulation to retain the heat. And because these pipes often snake through cold basements and crawl spaces, they can cool down pretty fast, causing your water heater to work overtime. Fortunately, insulating these pipes is simple and affordable. Pipe insulation runs around a dollar for six feet, which means you can probably do the job for less than twenty bucks.
Simply wrap the pipes in the polyethylene tubing and secure it with a bit of electrical tape. To insulate joints and bends in the pipe, cut two pieces of tubing at forty five degree angles and attach the two angled pieces together. This is a simple and very affective way to save on energy, so what are you waiting for.