Resideo by Honeywell TK300-60 Heating Expansion Tank 7.6 Gallon 1/2" NPT

The Resideo TK300-60 is a heating expansion tank designed to absorb hot water expansion in closed heating systems. This tank is equipped with a butyl diaphragm to separate the air from the system water, preventing waterlogging and maintaining consistent system pressure.

Key Features:

• 7.6 gallon total volume with 2.5 gallon maximum acceptance volume
• Factory pre-charged to 12 psig and 100% tested
• Butyl/EPDM diaphragm - 9 times better than natural rubber
• Welded steel construction, not clamped design
• Compact dimensions: 11" diameter x 23" height
• 1/2" external male NPT connection
• Replaces Watts ETX-60

Pre-pressurized, the tank keeps fluids circulating and maintains minimum pressure, ensuring optimal hydronic heating system performance. The superior butyl diaphragm construction provides long-lasting durability and prevents air absorption that can lead to system failures.