Quick Answer
A pressure tank size can impact water quality through sediment resuspension, contamination from tank surfaces, and inadequate filtration. Larger tanks may not be a solution, as they can exacerbate these issues. Proper tank sizing and maintenance are crucial for maintaining water quality.
Choosing the Right Pressure Tank Size
When selecting a pressure tank, it’s essential to consider the system’s flow rate, tank volume, and the amount of sediment that needs to be held. A general rule of thumb is to size the tank based on the system’s flow rate, typically 2-5 gallons of tank volume per minute (gpm) of flow rate. For example, a system with a 5 gpm flow rate would require a 10-25 gallon tank.
Sediment Resuspension and Water Quality
As water flows into and out of a pressure tank, sediment and particulate matter can be resuspended, leading to reduced water quality. A smaller tank size can help minimize sediment resuspension, as there is less water volume to stir up sediment. However, if the tank is too small, it may not provide enough volume to accommodate the system’s flow rate, leading to reduced water pressure.
Tank Surface Contamination and Maintenance
In addition to sediment resuspension, pressure tank surfaces can also contaminate the water supply. A well-maintained tank with a smooth, clean surface is essential for maintaining water quality. Regularly inspecting and cleaning the tank, as well as replacing the diaphragm and other components as needed, can help prevent contamination. It’s also essential to ensure the tank is properly sized for the system to prevent over-flow or under-flow, which can lead to reduced water quality.
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