Watts 0212002 Expansion Tank 10 Gal Hydronic Heating

Product Description

The WATTS 0212002 is a hydronic expansion tank designed to absorb pressure fluctuations in closed-loop heating systems. With a 10-gallon acceptance capacity housed in a 25-gallon carbon steel tank body, this unit handles the thermal expansion of water as system temperatures rise. The tank measures 16 inches in diameter and 33 inches in height, with a 1/4-inch port connection. The exterior carries a primer coat finish. Licensed plumbers and HVAC technicians install this tank as part of boiler-based or radiant heating systems where pressure relief and volume control are required.

This expansion tank is suited for residential and light commercial hydronic heating applications. It installs on the supply or return side of a closed-loop boiler system to prevent excessive pressure buildup that would otherwise trip the pressure relief valve. The 25-gallon tank volume and 10-gallon acceptance capacity make it appropriate for mid-sized heating systems. The primer-coated carbon steel construction provides durability in mechanical room environments where the tank is typically wall-mounted or floor-set near the boiler.

Key Features

• 10-gallon acceptance capacity controls pressure fluctuation in closed hydronic loops
• 25-gallon carbon steel tank body with primer coat finish for corrosion resistance
• 16-inch diameter and 33-inch height fits standard mechanical room installations
• 1/4-inch port connection for system integration
• Designed for residential and light commercial boiler and radiant heating systems

Compatibility

Designed as an OEM-style replacement or new-installation expansion tank for closed-loop hydronic heating systems requiring a mid-capacity pressure buffer vessel.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician in accordance with local plumbing codes and IFGC guidelines. Shut down and depressurize the boiler system completely before connecting or replacing the tank. Verify the tank pre-charge pressure matches system design pressure before placing the system back into service. Do not over-torque the port connection on the carbon steel fitting.