How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
What is a tankless water heater average life expectancy?
Tuesday, March 24, 2020
You can expect a tankless (on-demand) water heater to last 18 to 24 years, with an average of 20 years. Maintenance is important for a long life, and the critical task is flushing it out regularly. An isolator valve kit needs to be installed in order to do a flush. To learn more about this, see our blog post Why should a tankless water heater have an isolator/service valve kit installed?
And here’s a bar graph that compares the life expectancy of a tankless water heater to other home plumbing fixtures.
Also, we recommend these articles:
• Does a tankless gas water heater still work with no electricity during a power outage?
• What is the minimum clearance to doors and windows for an outdoor tankless gas water heater?
• Does a tankless water heater require a pressure relief valve?
• Does a tankless water heater in an attic require a drain pan?
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Here’s links to a collection of more blog posts about WATER HEATERS:
• Are water heaters required to be raised off the floor?
• Can a Temperature and Pressure Relief (TPR or T&P) valve be mounted to discharge horizontally?
• Where are gas water heaters not allowed to be installed?
• Is the minimum size water heater inlet pipe 1/2" or 3/4" according to the building code?
• Can you use a light switch for a water heater disconnect?
• How can I tell if a water heater is HUD-approved for mobile/manufactured homes?
• Can you wire a 240-volt water heater with 120 volts?
• Is it alright to have a shut-off valve on both the hot and cold water pipes at a water heater?
• What is the minimum clearance to doors and windows for an outdoor tankless gas water heater?
• What is required clearance for access and working space in front of an electric water heater?
• Why is the water heater older than the house?
• Does a water heater need a shut-off valve?
• When was a gas water heater first required to be elevated 18 inches above a garage floor?
• What is the purpose of a thermostatic mixing valve above a water heater?
• Does a tankless gas water heater still work with no electricity during a power outage?
• Why do water heaters have a sacrificial anode?
• What is the difference between a manufactured/mobile home water heater and a regular water heater?
• When is a water heater drain pan required?
• What are the most common installation mistakes with water heater replacement?
• Why is my water heater making strange (rumbling, gurgling, knocking or banging) noises?
• What can I do to make my water heater last longer?
• How does a hydronic heating system work?
• What is the difference between a regular water heater and a direct vent water heater?
• What is the difference between a regular water heater and a power vent water heater?
• What is backdrafting at a gas water heater?
• How do I determine if a water heater is gas or electric?
• What does it mean when a gas appliance (water heater, furnace, or range) has been "red tagged"?
• What's the valve with the flip-up handle on the water heater for?
• Why is an older water heater an insurance problem?
Visit our WATER HEATERS page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.
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