Zilmet Hydro Pro 250L Potable Expansion Vessel

The Zilmet Hydro Pro 250L Potable Expansion Vessel is designed for high-capacity domestic hot water, potable water and pressurised water systems. Its 250 litre capacity provides substantial expansion volume to accommodate changes in water volume as it is heated, helping maintain controlled system pressure.

The Hydro Pro combines a fixed potable-water-rated butyl membrane with a robust carbon steel shell. Its MIG-welded construction is designed to provide a smooth internal surface, while the membrane configuration helps minimise areas where water can stagnate. The durable epoxy-coated finish and floor-standing design make this vessel suitable for larger commercial and domestic water heating installations.

Please note: Vessel shape may differ slightly from the product image.

Key Features

• 250 litre capacity for high-volume potable water systems
• Designed for domestic hot water and potable water applications
• Fixed butyl membrane designed to minimise water stagnation
• 10 bar maximum working pressure
• 2 bar factory pre-charge
• Robust MIG-welded carbon steel construction
• Durable epoxy-coated finish
• 1¼" BSP connection
• Floor-standing configuration for larger installations
• Suitable for water heaters, boilers and pump systems
• Helps accommodate thermal expansion
• Suitable for applications requiring water hammer control
• Certified according to PED 2014/68/EU
• 5-year warranty

Typical Applications

• Large domestic hot water systems
• Commercial hot water installations
• High-capacity water heating systems
• Hot water cylinders and water heaters
• Boiler and pressurised water systems
• Potable water installations
• Pump and boosted water systems
• Thermal expansion control
• Water hammer reduction

Technical Specifications