Resideo by Honeywell XPS-040V 20 Gallon Expansion Tank with 1 Inch Connection

The Resideo by Honeywell XPS-040V is a 20-gallon thermal expansion tank designed to protect closed-loop hydronic heating and plumbing systems from excessive pressure buildup. When water is heated in a closed system, it expands and can create dangerous pressure levels—this expansion tank absorbs that excess volume to prevent damage to water heaters, fixtures, and piping.

Key Features:

• 20-gallon capacity suitable for residential and light commercial applications
• 1-inch NPT threaded connection for secure installation
• Pre-pressurized butyl rubber diaphragm separates water from air charge
• Heavy-duty steel construction with corrosion-resistant coating
• Complies with thermal expansion requirements in most plumbing codes
• Helps extend water heater life by reducing thermal stress
• Reduces water hammer and pressure fluctuations

This expansion tank is typically installed on the cold water supply line near the water heater. The internal diaphragm design prevents waterlogging and eliminates the need for routine maintenance. Proper sizing and installation ensures your plumbing system operates safely within acceptable pressure ranges.