Description
Watts ETX-30 Expansion Tank Overview
The Watts ETX-30 Expansion Tank (SKU 0066606) is engineered to protect closed-loop hydronic heating systems from the damaging effects of thermal expansion. As water heats up and expands within a closed system, this tank absorbs the excess volume, maintaining safe and stable operating pressure throughout the system. With a 1/2″ connection, it integrates easily into residential and light commercial hydronic installations.
Key Features
- Designed for closed-loop hydronic heating and potable water systems
- 1/2″ connection for straightforward installation into existing piping
- Pre-pressurized with an internal diaphragm to accommodate system expansion
- Durable steel construction for long-lasting, reliable performance
- Helps prevent pressure relief valve discharge and system stress caused by thermal expansion
- Compact ETX-30 design suitable for residential and light commercial applications
Why Use an Expansion Tank?
In any closed hydronic heating system, water expands as it is heated. Without an expansion tank, this increased volume causes system pressure to rise rapidly, potentially triggering pressure relief valves or damaging components. The Watts ETX-30 absorbs this expansion safely, protecting your boiler, piping, and fittings from pressure spikes and extending the life of the entire system.
Typical Applications
- Residential and light commercial hydronic heating systems
- Closed-loop boiler installations
- Radiant floor heating systems
- Hot water baseboard heating systems
Brand Assurance
Watts is a globally recognized leader in flow control, water quality, and conservation products. The ETX series expansion tanks reflect Watts’ commitment to quality engineering, system reliability, and ease of installation — making them a trusted choice among HVAC professionals and plumbing contractors.
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