Resideo by Honeywell TX-25V Thermal Expansion Tank 10.3 Gallon

The Resideo by Honeywell TX-25V is a 10.3-gallon thermal expansion tank designed to protect residential and light commercial plumbing systems from excessive pressure caused by thermal expansion. When water is heated in a closed system, it expands and can create dangerous pressure buildup—this expansion tank provides a cushion to absorb that excess volume and maintain safe system pressure.

Key Features:

• 10.3-gallon capacity suitable for water heaters up to 80 gallons
• 1-inch threaded connection for easy installation
• Butyl rubber diaphragm separates water from pre-charged air chamber
• Pre-pressurized to 40 PSI for immediate installation
• Durable steel construction with corrosion-resistant finish
• Complies with plumbing codes requiring thermal expansion protection
• Helps extend water heater life by reducing stress on tank and fittings

This expansion tank is ideal for installations with closed plumbing systems that include backflow preventers, check valves, or pressure-reducing valves. The pre-charged design eliminates the need for field pressurization, and the replaceable diaphragm ensures long-term reliability. Proper sizing and installation help prevent relief valve discharge, premature tank failure, and potential water damage.