A water heater pressure relief valve typically lasts 3 to 5

years and should be replaced according to manufacturer guidelines, even if it appears to be working well, as valves can wear out over time and become less responsive; regular testing is crucial to ensure proper function. 

 

Key points about water heater relief valves: 

• Maintenance is key: Regularly test the valve by pulling the lever to check for water flow; if there are signs of malfunction like constant leaking or no water discharge during testing, replace it immediately. 
   
• Factors affecting lifespan: Water quality, system usage, and maintenance can impact the valve's lifespan. 
   
• Signs of replacement needed: Visible corrosion, leaking, or failure to open at the set pressure.