The Granby Steel 240 Gallon Hydronic Expansion Tank is engineered for commercial and large residential hydronic heating systems requiring stable pressure control, long‑term durability, and dependable performance. Built from heavy‑gauge steel and manufactured to Granby’s strict quality standards, this expansion tank provides the robust construction needed to withstand the thermal expansion cycles common in high‑capacity boiler systems.
With a 240‑gallon capacity, this model is designed to absorb system expansion, maintain consistent operating pressure, and protect boilers, pumps, and piping from stress caused by temperature fluctuations. Its welded steel shell delivers exceptional structural integrity, while the corrosion‑resistant interior ensures long service life in closed‑loop hydronic applications. The tank’s smooth, cylindrical profile supports even pressure distribution and reduces mechanical strain during operation.
The exterior features a durable, industrial‑grade finish that resists wear, moisture, and environmental exposure. Standard connection ports allow for straightforward integration into existing or newly installed hydronic systems, and the tank’s footprint is optimized for mechanical rooms, utility spaces, and commercial boiler installations. Technicians benefit from a simple, service‑friendly design with clearly accessible fittings and mounting points.
Ideal for use with hot water boilers, commercial hydronic systems, and multi‑zone heating applications, the Granby Steel 240 Gallon Expansion Tank provides reliable pressure stabilization and long‑term system protection. Whether used in new construction or as part of a system upgrade, it delivers the durability, performance, and engineering quality expected from Granby — one of North America’s most trusted names in steel tank manufacturing.
🛠️ Product Overview
- Model: Granby 202201 / 202201G
- Capacity: 240 gallons
- Material: 12-gauge ASTM A-1011 steel
- Orientation: Vertical, narrow profile
- Installation Type: Aboveground only
- Certifications: UL-80 listed; UL-142 available on select models
🔧 Technical Specifications
- Dimensions: 47" H × 23" W × 60" L
- Weight: Approx. 265 lbs
- Openings:
- Four 2" NPT top tappings
- One ½" NPT bottom tapping
- Handles: Two large recessed grip handles for easy maneuverability
- Leg Brackets: Robust steel brackets for enhanced stability
- Pressure Rating: Factory pressure tested at 5 PSIG
- Operating Pressure: Atmospheric only
🎨 Finish & Protection
- Coating: Phosphate-washed and oven-dried
- Paint: Black or grey electrostatic powder coating for corrosion resistance
✅ Key Benefits
- Durable construction for long-term reliability
- Easy retrofit with standard NPT openings
- Environmentally friendly coating options
- Designed to eliminate water buildup from condensation
This tank is ideal for residential or light commercial hydronic systems requiring a large-capacity expansion solution with proven durability and safety standards.
We service and install all types of HVAC heating and cooling equipment throughout Long Island, including (but not limited to) this coverage area:
Nassau County: Oyster Bay, Hempstead, North Hempstead, Glen Cove, Long Beach, Freeport, Valley Stream, Garden City, Great Neck, Mineola, Hicksville, Levittown, Massapequa, Bethpage, Plainview, Syosset, Jericho, Westbury, Rockville Centre, Farmingdale
Suffolk County: Huntington, Babylon, Islip, Smithtown, Brookhaven, Riverhead, Shelter Island, Southold, Southampton, East Hampton, Commack, Deer Park, Lindenhurst, Bay Shore, Brentwood, Central Islip, Hauppauge, Centereach, Selden, Medford, Patchogue, Shirley
Contact us today at (631) 779-3196
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