Grant Flexi Hose Vbs125 Expansion Vessel

3/4 f x 1/2 m 800mm Vortex Pro Combi post Dec 2014

Grant Flexi Hose – VBS125

Genuine Flexible Connection Hose for Expansion Vessel – Grant Oil Boilers

The Grant VBS125 Flexi Hose is a genuine OEM flexible braided hose designed for connecting the expansion vessel to the heating system circuit in Grant Vortex oil boilers. This ½" connection hose ensures reliable water flow and accommodates thermal expansion within sealed systems—making it an essential component for both system performance and safety.

Whether you’re replacing a leaking hose or completing a routine service, the VBS125 offers a pre-sized, robust solution for connecting internal expansion vessels with minimal hassle and maximum durability.

 Key Features & Benefits

• Official Grant OEM Part – VBS125
  Engineered by Grant for seamless compatibility with select Vortex boiler models.

• Flexible Stainless Steel Construction
  Braided hose provides resistance to pressure, corrosion, and temperature fluctuations.

• Ensures Safe Pressure Regulation
  Allows for safe expansion of system water during heating cycles—prevents pressure build-up.

• Pre-Cut Length for Easy Installation
  No cutting or modifying required—ideal for use in tight boiler spaces or plant rooms.

• Compatible with Internal Expansion Vessel Assemblies
  Links vessel to system pipework securely and safely.

• Ideal for Servicing and Repairs
  A must-have replacement during expansion vessel replacement or routine system maintenance.

 Compatible Grant Boiler Models

The VBS125 Flexi Hose is compatible with a range of Grant Vortex oil boiler models, including:

• ? Grant Vortex Utility & Heat Only models (with internal expansion vessels)

• ? Grant Vortex Pro & Eco variants (select models)

• ? Other compatible sealed system boilers where a ½" braided vessel hose is used

Not sure if this hose fits your boiler? Contact our team with your model or serial number and we’ll verify compatibility quickly.

 When to Replace the Flexi Hose

Replace the VBS125 if:

• There is leaking, corrosion, or rust at the hose connections

• The hose appears bulged, kinked, or flattened

• The system is experiencing inconsistent pressure or frequent PRV discharge

• You are replacing the expansion vessel or completing a full internal service

Neglecting a worn flexi hose can lead to pressure faults, system shutdowns, and potential water damage.

Technical Specifications

• Part Number: VBS125

• Manufacturer: Grant UK

• Component Type: Flexible braided expansion vessel hose

• Material: Stainless steel outer braid with high-temp resistant inner lining

• Connection Size: ½” BSP (British Standard Pipe) threaded ends

• Length: Pre-sized for internal installation (model-specific length)

• Application: Connects expansion vessel to heating circuit

• Pressure Rating: Suitable for typical sealed heating system pressures (up to 3 bar)