What Causes Too Much Pressure in Hot Water Heater?

It’s a common question that many home owners have been asking: What causes too much pressure in the hot water heater? The answer to this common question lies in understanding how and why you feel the pressure building up in your hot water heater. Too much pressure in a hot water heater happens when the flow of hot water is reduced or the temperature of the water is too low. When the temperature starts to rise because of a low flow or because of the warmer temperature outside, the pressure builds up because of the force of gravity and the decreased air pressure in your home.