According to industry professionals, up to 30% of water heater failures are linked to improper installation practices. This includes poor venting, lack of expansion tanks, incorrect pressure settings, and faulty electrical connections—all of which can stem from code violations.
Improper installations, often due to installs by unlicensed contractors or “handymen,” increase the likelihood of issues like leaks, overheating, and pressure buildup—all of which can cause early failure of the water heater.
A significant number of water heater-related safety issues, such as carbon monoxide poisoning or pressure explosions, can be directly traced back to installations that do not meet safety codes. For example, poorly vented gas water heaters are a common source of carbon monoxide leaks.
The American Society of Home Inspectors (ASHI) and other inspection bodies note that a large percentage of water heaters inspected are improperly installed or missing key safety features, such as temperature and pressure (T&P) valves, which are mandated by code.
Many insurance companies report that improper installation of water heaters is a common cause of claims, particularly when it leads to water damage or gas leaks. Water heaters not installed to code are more likely to cause significant damage or pose a safety hazard, which then results in costly claims. Furthermore, most insurance companies will deny claims for damage caused by an improperly installed water heater.
Manufacturers often report that a portion of water heater failures under warranty can be traced back to improper installation. These failures frequently occur due to installations not adhering to the manufacturer’s recommendations, which are often aligned with local building codes. manufacturer warranties are typically invalidated if the water heater was not properly installed by a licensed plumbing professional.
