Grant Auto Air Vent 3/8" Mpcbs29

3/8" Fitting Safety Device Expels gas and air

Grant Auto Air Vent 3/8" – MPCBS29
The Grant MPCBS29 is a genuine 3/8" automatic air vent designed for use in sealed Grant heating systems. It removes trapped air from the system automatically, preventing airlocks, pump strain, gurgling pipes, and poor radiator performance. Essential for maintaining proper water circulation and ensuring efficient boiler operation, this compact air vent fits directly into 3/8" BSP vent points across a wide range of Grant oil-fired boilers.

• OEM Grant part – MPCBS29

• 3/8" BSP male thread for easy installation

• Automatically releases air from heating system

• Float-operated internal mechanism – no manual bleeding

• Reduces risk of corrosion, cold spots, and pump wear

• Ideal for servicing or resolving air circulation issues

• Made from corrosion-resistant brass

Compatible Grant Boiler Models

• Grant Vortex Pro Internal and External boilers

• Grant Vortex Eco Utility and Wall-Hung models

• Grant Vortex Combi 21kW, 26kW, and 36kW

• Grant Euroflame and Multipass models

• Any Grant system using a 3/8" BSP air vent connection

When to Replace the Auto Air Vent

• Boiler system is noisy or shows signs of trapped air

• Radiators have cold spots despite proper bleeding

• Valve shows external leaks, corrosion, or poor sealing

• During annual service or pump/pipework replacement

Technical Specifications

• Part Number: MPCBS29

• Manufacturer: Grant UK

• Thread Size: 3/8" BSP male

• Material: Brass with internal float

• Operating Pressure: Up to 3 bar

• Operating Temperature: Up to 110°C

• Function: Automatic air removal from sealed central heating systems

We are proud to be an authorized distributor of Grant products. All our parts come directly from Grant UK to ensure authenticity, compatibility, and lasting quality. Supplied as a genuine part from Heating-Parts.co.uk – trusted supplier of oil boiler components.