HP-24 is a 24-liter (6.0-gallon) expansion tank specifically engineered for closed-loop hydronic heating and cooling systems. It effectively regulates fluid expansion and pressure buildup, ensuring the safety and stability of residential or commercial climate-control setups.
Built for high-performance environments, the tank supports a maximum operating pressure of 10 bar (150 psi) and temperatures up to 130°C (266°F). It is factory pre-charged to 1 bar (15 psi) and is fully compatible with propylene glycol mixtures of up to 50%.
With a diameter of 29.0 cm and a height of 41.95 cm, this mid-to-large capacity tank provides reliable expansion absorption for demanding applications. It is designed for convenient installation alongside non-potable water systems, offering a robust solution in a versatile footprint.
Product Overview
The HP-24 is a 24-liter (6.0 gallon) hydronic expansion tank engineered specifically for closed-loop hydronic heating and cooling systems. As the fluid in your climate-control system changes temperature, it expands and contracts; the HP-24 safely absorbs this expanded fluid volume, effectively controlling the excessive pressure generated inside the system and preventing potential hazards.
Crafted from robust sheet steel tanks compliant with IAPMO and EN standards, the HP-24 is welded according to strict ASME & EN procedures by certified welders, ensuring long-lasting durability and safety. Utilizing a specialized, high-temperature-resistant EPDM rubber diaphragm, it ensures exceptionally reliable operation. To guarantee supreme durability, every single Hydro-Plus model undergoes rigorous hydraulic testing at a pressure 1.5 times higher than the design pressure.
Manufactured with premium materials, Aquasky HYDRO-PLUS tanks are the ultimate safety choice for your hydronic heating system, delivering dependable performance and peace of mind.
Certification
Specifications and Technical Data
| Parameter | Value |
| Model Number | HP-24 |
| Total Tank Volume | 24 liters / 6.0 gallons |
| Diameter | 29.0 cm / 11.4 inches |
| Height | 41.95 cm / 16.5 inches |
| Net Weight (NW) | 3.6 kg / 7.9 lbs |
| Gross Weight (GW) | 4.5 kg / 9.9 lbs |
| Shipping Volume | 1.42 CUF |
| Max. Operating Temperature | 130°C / 266°F |
| Factory Pre-charge | 1 bar | 15 psi |
| Max. Operating Pressure | 10 bar | 150 psi |
| Connection | 1/2" Cacbon Steel / Stainless Steel |
| Diaphragm Material | High-temperature resistance EPDM Rubber |
| Tank Body Shell | Cold Rolled Carbon Steel |
| External Coating | Gray Paint |
| Air Nozzle Protection | Brass cap with internal O-ring |
| Pre-charge Gas | 100% Nitrogen |
Key Features & Design Advantages
How the HYDRO-PLUS Pressure Tank Works
In closed hydronic heating and cooling systems, fluid volume changes drastically as the temperature rises and falls. The HP-24 safely absorbs this expanded fluid using a sealed, compressible air cushion space. It stores the fluid securely against the high-temperature EPDM rubber diaphragm, while the air chamber compresses to accommodate the volume change. This mechanism seamlessly controls excessive pressure, protects valves and piping, and maintains safe system parameters without venting fluid.
Key benefits
Typical Applications
Frequently Asked Question (FAQ)
A: The HP-24 (6.0-gallon) is ideal for larger residential properties or light commercial systems. It is the preferred choice for setups with extensive underfloor heating or large radiator networks where a smaller tank might not provide enough volume to handle total thermal expansion.
A: No, it follows the same "low-maintenance" philosophy as the rest of the Hydro-Plus line. However, because it often supports larger, more complex systems, we recommend an annual check of the 1 bar (15 psi) pre-charge to ensure the tank continues to regulate pressure at peak efficiency.
A : The HP-24 is engineered for modern system chemistry. It is fully compatible with up to 50% propylene glycol mixtures, ensuring that the internal diaphragm and shell remain resilient even in systems requiring high levels of freeze protection or specialized corrosion inhibitors.
Downloads & Certification Links