Zilmet Hydro Pro 400L Potable Expansion Vessel

The Zilmet Hydro Pro 400L Potable Expansion Vessel is built for large domestic hot water, potable water and pressurised water systems. Its generous 400 litre capacity helps manage thermal expansion as water temperature rises, supporting stable pressure in high-capacity installations.

Designed for demanding commercial and domestic applications, this floor-standing vessel combines a MIG-welded carbon steel shell with a durable epoxy powder-coated finish. Its fixed butyl membrane is designed to minimise stagnant water areas, making it a practical choice for water heaters, boilers, pump systems and boosted water systems.

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

Key Features

• 400 litre capacity for large potable and domestic hot water systems
• 10 bar maximum working pressure with a 2 bar factory pre-charge
• Fixed butyl membrane designed to minimise water stagnation
• Robust MIG-welded carbon steel shell with epoxy powder-coated finish
• 1¼" BSP connection and floor-standing configuration
• Suitable for water heaters, boilers, pump systems, thermal expansion control and water hammer reduction
• Certified to PED 2014/68/EU and supplied with a 5-year warranty

Typical Applications

• Large domestic and commercial hot water installations
• Potable and pressurised water systems
• Hot water cylinders, water heaters and boilers
• Pump and boosted water systems

Technical Specifications