Can I combine multiple pressure tanks for increased capacity?

Choosing Compatible Tanks

When combining multiple pressure tanks, it’s crucial to select tanks with compatible materials and designs to prevent corrosion, contamination, or other issues. Typically, you’ll want to stick to tanks made from the same material, such as steel or fiberglass, and ensure they have similar pressure ratings and mounting systems. For example, combining a 100-gallon steel tank with a 50-gallon fiberglass tank may not be the best option due to differences in material and pressure capabilities.

Calculating Combined Capacity

To calculate the combined capacity of multiple tanks, simply add their individual capacities. For instance, combining three 50-gallon tanks would result in a total capacity of 150 gallons. However, you’ll also need to consider the tank’s drawdown capacity, which is the amount of water that can be withdrawn from the tank before it needs to be refilled. A general rule of thumb is to have at least 1-2 gallons of drawdown capacity for every gallon of tank capacity.

Proper Installation and Sizing

When combining multiple pressure tanks, proper installation and sizing are critical to ensure safe and efficient water distribution. This includes ensuring the tanks are properly sized for your system, with adequate space for air pockets and expansion, and that the piping and fittings are compatible with the tanks’ materials and designs. It’s also essential to consider factors like tank placement, water chemistry, and system pressure to prevent issues like corrosion, scaling, or excessive wear on system components.