All homes have a condition within their plumbing system called thermal expansion.
When cold water is heated in a hot water tank it expands as it heats up. Meter check valves prevent this expansion from flowing back into the City's water mains, and higher water pressure within the home is the result. When this happens you will notice small spurts of water being released as the relief valve tries to lower the water pressure. If you have this problem, you may want to lower your expanded water pressure by lowering the temperature setting on your hot water heater to the lowest setting that still provides adequate hot water. If this does not solve the problem, we recommend installing a thermal expansion tank within your plumbing system.