Your water heater in Londonderry, NH, might not be something you think about a lot, but you’ll definitely notice it when things stop working correctly. Having a working water heater lets you enjoy those hot showers you love, and it makes it easier to keep your home clean and sanitary. Mainline Plumbing specializes in water heater replacement with a variety of options. Our experienced team also handles water heater service when you need a water heater repair.