Pro Water Parts 2 Gallon Accumulator Expansion Tank – 1/2-Inch NPT, Wall Mount Bracket

Overview

The Pro Water Parts 2 Gallon Accumulator Expansion Tank is designed to help stabilize water volume fluctuations in residential and light commercial systems. With a compact 2 gallon capacity, it provides a practical reserve to accommodate the natural expansion of heated water, contributing to steadier pressure and smoother operation without occupying valuable floor space.

Key features include a 1/2 inch female NPT connection, a sturdy wall mount bracket for convenient placement, and a robust rating that suits typical household service pressures. The unit ships with a pre installed air chamber pre pressurized to 30 PSI, making it ready for a range of standard installations.

What makes it useful

• 2 gallon capacity provides a modest reserve to absorb volume changes
• 1/2 inch female NPT thread matches common fittings
• Wall mount bracket included for quick, space efficient installation
• Max liquid pressure 130 PSI supports typical household service pressures
• Pre pressurized air at 30 PSI speeds response to pressure shifts
• Suitable for gas, oil, or electric direct-fired water heaters and potable water storage

Real world use cases

In a home with a direct-fired water heater, the expansion tank can accommodate the extra water volume produced during heating. In retrofit projects, the wall mounted design frees cabinet space while keeping the tank accessible for inspection. For homes with solar or backup heating, the unit can help maintain steadier pressure and reduce abrupt pump cycling.

Installation and compatibility

The included custom wall brackets simplify mounting on solid surfaces. The 1/2 inch female NPT connection fits a wide range of standard fittings and piping arrangements, enabling straightforward integration into existing water systems.