Grant Expansion Vessel 24Ltr Vbs124 Vortex Pro Combi

All models post December 2014 18 X 36 X 46 cm

A 24-liter capacity expansion vessel used in Grant heating systems, particularly in their boilers. The expansion vessel is an essential component that helps accommodate the expansion of water as it heats up within the closed-loop heating system. This process prevents excessive pressure buildup and helps protect the system from potential damage due to overheating. The 24-liter capacity indicates the vessel's size, which is suitable for heating system requirements, ensuring efficient and reliable operation.

Grant Expansion Vessel 24Ltr – VBS124

Genuine Expansion Vessel for Grant Vortex Pro Combi Boilers

Maintain stable system pressure and extend the lifespan of your boiler with the Grant 24Ltr Expansion Vessel – VBS124. This genuine Grant replacement component is designed specifically for use in Vortex Pro Combi boilers, providing the essential pressure buffering needed in sealed central heating systems. The 24-litre capacity allows for effective accommodation of water expansion as the system heats up, helping to prevent pressure-related faults, leaks, and system strain.

Whether you’re a heating engineer conducting a repair or a skilled DIY customer servicing your boiler, this part offers reliable performance and peace of mind.

 Key Features & Benefits

• Genuine Grant Spare – VBS124
  Manufactured to meet Grant’s exacting standards for performance, safety, and compatibility.

• Large 24-Litre Capacity
  Designed to handle larger domestic heating systems or combi boilers with higher water content.

• Supports Stable System Pressure
  Absorbs thermal expansion to prevent over-pressurisation, water discharge, and pressure-related faults.

• Durable, Heat-Resistant Construction
  Built from corrosion-resistant materials and designed to withstand continuous system cycling.

• Easy to Fit & Maintain
  Pre-charged and supplied ready for installation with standard connection fittings.

 Compatible Grant Boiler Models

The VBS124 24L Expansion Vessel is compatible with several models in the Grant Vortex Pro Combi range, including:

• Grant Vortex Pro Combi 21kW

• Grant Vortex Pro Combi 26kW

• Grant Vortex Pro Combi 36kW

• Other Grant oil boilers requiring a 24-litre expansion vessel as part of a sealed system configuration.

Not sure if this fits your boiler? Our support team is happy to confirm compatibility—just get in touch with your boiler’s serial number.

 

 When Should You Replace the Expansion Vessel?

Replace the expansion vessel if:

• Your system frequently reaches over 3 bar and discharges water

• You notice the pressure gauge dropping rapidly when cold or spiking when hot

• The vessel is leaking, corroded, or fails a pressure test

• You’re conducting a major system service or replacing pressure-related components

A faulty vessel can cause system lockouts, water loss, and damage to other components—replacing it ensures safe, smooth operation.

 

 

 Technical Specifications

• Part Number: VBS124

• Manufacturer: Grant UK

• Type: Internal expansion vessel

• Capacity: 24 litres

• Pre-Charge Pressure: Typically 0.75–1.0 bar (check boiler manual for system-specific setting)

• Max Operating Pressure: Up to 3 bar

• Material: Powder-coated steel with internal EPDM diaphragm

• Mounting Position: Internally within boiler casing or mounted externally if required