How do I know when it is time to replace my water heater? Depending upon model, the make and volume of use, you can anticipate your water heater to offer you service for about 10 to 15 decades. All Hour Plumbing and Drain specializes in water heater installation and upkeep. Chemical drain cleaners include dangerous, highly toxic compounds which aren't a good idea to maintain a house with children or pets, or even to utilize in your home's plumbing pipes, because the compounds will cause the plumbing to deteriorate and eventually fail.