Why would a pressure tank lose pressure frequently?

Incorrect Tank Sizing

A pressure tank that is too small for the household’s water demand can lead to frequent pressure drops. To determine the correct tank size, calculate the gallons per minute (GPM) of water usage for the household. A general rule of thumb is to choose a tank that is 1/4 to 1/3 the total daily water usage. For example, if the household uses 1000 gallons of water per day, a 250-333 gallon tank would be suitable. However, this calculation may need to be adjusted based on factors such as water heater demand, irrigation, and other non-potable uses.

Excessive Water Draw

Excessive water draw can also cause a pressure tank to lose pressure frequently. This can be due to leaky faucets, running toilets, or other appliances that continuously use water. Installing low-flow showerheads and toilets can help reduce water usage. Additionally, installing a flow restrictor on the water supply line to the pressure tank can help slow down the water draw, preventing the tank from being depleted too quickly.

Incorrect Pressure Setting

An incorrect pressure setting on the pressure tank can also cause pressure drops. If the pressure setting is too low, the tank may not be able to maintain sufficient pressure to supply the household. Conversely, if the pressure setting is too high, the tank may over-pressurize, leading to premature wear and tear on the tank and its components. It is recommended to set the pressure setting to 45-60 PSI, depending on the specific tank and household requirements.