What a water heater is (and what it is supposed to do)
A water heater is an appliance with an energy source, typically gas or electricity, used to heat water for use in residential or commercial structures.
There are two common categories:
- Traditional tank-style water heaters that heat and store water in a tank.
- Tankless (on-demand) water heaters that do not store water in a tank.
From a claims perspective, both are frequently encountered when an appliance leaks and causes water damage. Tankless systems can also contribute to elevated humidity and condensation conditions due to continuous hot water availability.
Installation factors that change the story
Manufacturer installation instructions should be followed, as reinforced by commonly used building and plumbing codes.
Key installation details to document on scene before removal:
- Drainage piping
- Required clearances
- Condition and routing of the temperature & pressure (T&P) relief valve and discharge piping
- Presence and condition of a drain pan (or a suitable drain)
- Location of a floor drain
What adjusters should document before removal
As with any product-related matter, preserve the backstory and identifiers:
- Part numbers
- Manufacturer
- Approximate age and date of installation
- Overall condition (photos before removal)
- Maintenance records
- Any work performed in proximity to the unit
If subrogation is being considered, confirm applicable timing requirements with counsel (including statute of repose in the relevant jurisdiction).
How water heaters commonly fail
Common failure patterns include:
- Installation-related issues
- Improper connection of water lines (including polymer pipe directly at inlet/outlet)
- Lack of dielectric connections
- Missing pan or missing / improper T&P piping (removal of a required safety element)
- Manufacturing or materials issues
- Improper welds
- Insufficient bonding of glass lining
- Maintenance-related conditions
- Failure to flush and drain annually
- Failure to inspect the anode
- Water softener issues that accelerate corrosion (including inappropriate salt addition)
- Normal wear and tear
- Component failures (interlocks, sensors) often occur before a tank failure
What an expert looks for during evaluation
Common visual indicators include:
- Mineral / salt deposits
- Corrosion
- Leak indicators
Context matters. Age, install date, maintenance, and usage patterns should be considered. Certain conditions can reduce life expectancy, including recirculation pumps and hydronic heating use.
Evidence quality and next-step testing
In many cases, the leakage point is concealed. The initial exam may identify whether leakage occurred and recommend additional work. Often, a joint destructive exam is needed to classify the failure mode.
