Quick Answer
To prevent water hammer in pressure tank systems, install a pressure relief valve and ensure the tank is properly sized for the system's flow rate. The relief valve should be set between 15-30 psi above the system's normal operating pressure. Regularly inspect and maintain the valve to ensure proper function.
Selecting a Properly Sized Pressure Tank
When sizing a pressure tank, it’s essential to consider the system’s flow rate and the total volume of water required to maintain a consistent pressure. A general rule of thumb is to size the tank to hold at least 2-3 gallons of water for every gallon-per-minute (gpm) of the system’s flow rate. For example, a system with a 10 gpm flow rate would require a tank with a minimum capacity of 20-30 gallons.
Installing a Pressure Relief Valve
A pressure relief valve is a critical component in preventing water hammer in pressure tank systems. It allows excess pressure to be released from the tank, reducing the risk of damage to the tank, pipes, and surrounding equipment. The valve should be set to open between 15-30 psi above the system’s normal operating pressure, allowing for a safe and controlled release of pressure. It’s essential to regularly inspect and maintain the relief valve to ensure proper function and prevent premature wear.
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