Zilmet Expansion Vessel Central Heating - 24 Litres

Zilmet Expansion Vessel Central Heating - 24 Litres

The Zilmet 24 Litre Expansion Vessel is a high-performance pressure vessel designed for use in sealed central heating systems to accommodate thermal expansion and maintain stable system pressure. Built to European quality standards, this vessel ensures safe operation of boilers and hydronic systems by preventing overpressure and reducing wear on pumps, valves, and heat exchangers.

Manufactured by Zilmet, a global leader in pressure vessel technology, this 24-litre model features a robust steel body and a flexible synthetic rubber diaphragm that separates the air and water chambers. This construction guarantees long-lasting durability, reliability, and consistent pressure compensation under demanding heating conditions.

Key Features

• Genuine Zilmet central heating expansion vessel – 24 litres

• Designed to absorb system pressure changes in sealed heating systems

• Prevents overpressure and safety valve discharge

• Steel body with synthetic rubber membrane for long service life

• Pre-charged air pressure for quick installation and setup

• Compatible with a wide range of domestic and commercial boilers

• Suitable for wall or floor mounting (bracket optional)

• Tested to EN13831 standards for safety and reliability

Compatibility

• Suitable for oil, gas, or electric boiler systems

• Ideal for use with domestic heating circuits up to medium capacity

• Compatible with most UK-manufactured sealed system boilers

When to Replace

• If boiler pressure drops frequently or fluctuates

• When the existing vessel is waterlogged or loses air charge

• During boiler replacement or heating system upgrade

Technical Specifications

• Manufacturer: Zilmet

• Model: 24L Central Heating Expansion Vessel

• Type: Sealed system pressure vessel

• Capacity: 24 litres

• Material: Steel body with EPDM rubber diaphragm

• Max Pressure: 3 bar

• Pre-Charge Pressure: 1.5 bar

• Connection Size: ¾" BSP male

• Temperature Range: -10°C to +120°C

• Mounting: Wall or floor-mounted (bracket optional)

• Certification: CE / EN13831 compliant