Resideo tk300-60 Heating Expansion Tank 7.6 Gal

Product Description

The RESIDEO tk300-60 is a pre-pressurized heating expansion tank designed to absorb thermal expansion in closed hydronic heating systems. It uses a butyl diaphragm to separate the air charge from system water, maintaining system pressure and protecting components from pressure spikes caused by heated fluid expansion. With a 7.6-gallon capacity and a 1/2-inch external NPT connection, this tank suits residential and light commercial hydronic heating installations. Licensed plumbers and HVAC technicians install this tank as part of closed-loop hot water heating system commissioning or retrofit work.

This expansion tank is installed in closed hydronic heating systems where thermal expansion of the heated fluid must be controlled to maintain safe operating pressure. It is appropriate for residential boiler systems and light commercial applications where a pre-pressurized diaphragm-style tank is required. The 7.6-gallon capacity accommodates system volume and temperature ranges typical of residential and small commercial hot water heating loops. The butyl diaphragm construction keeps air and water separated, preserving diaphragm integrity and maintaining consistent pre-charge pressure over time.

Key Features

• Pre-pressurized design maintains minimum system pressure and keeps fluid circulating without manual air management
• Butyl diaphragm separates air charge from system water, extending service life and preventing waterlogging
• 7.6-gallon capacity sized for residential and light commercial closed hydronic heating loops
• 1/2-inch external NPT connection for straightforward integration into standard piping systems
• Closed-system design absorbs expansion pressure spikes, protecting boilers, valves, and piping from overpressure damage

Compatibility

Designed as an OEM-style replacement or new-installation expansion tank for closed hydronic hot water heating systems requiring a pre-pressurized diaphragm-style tank with a 1/2-inch external NPT connection.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician in accordance with local plumbing codes and IFGC requirements. Shut down the boiler and relieve system pressure before connecting or disconnecting the tank. Verify the factory pre-charge pressure matches system design requirements before placing the system into service. Do not install in open-loop or potable water systems.

Technical Specifications

• Capacity: 7.6 gallons
• Connection Size: 1/2 inch external NPT
• Diaphragm Material: Butyl
• System Type: Closed hydronic heating
• Pre-pressurized: Yes

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: tk300-60