When a TPRV at a water heater leaks, it's usually a simple fix; just replace the valve. These valves cost less than $15 and replacing the valve is a basic job.

Many water heaters feature an expansion tank to protect the system. Here's what a water heater expansion tank does and how you know if your system needs one.

When a water heater is connected to a closed system, an expansion tank must be installed to prevent excessive pressure caused by thermal expansion.