Grant Flow Switch Mpcbs71X Vortex 21, 26 36

VORTEX 36 POST 15/05/08 VKX15M1GRANT02 and VKX15M1GRANT03 Now VKX15M1GRANT04 Round Head Paddle

Grant Flow Switch – MPCBS17X
The Grant MPCBS17X is a genuine flow switch used in selected Grant Vortex Pro Condensing Combi boilers. It detects changes in fluid flow within the domestic hot water circuit and signals the boiler to activate, ensuring consistent hot water performance and reliable system operation.

• OEM part manufactured by Grant UK

• Monitors fluid flow in the DHW system

• Triggers boiler ignition when flow is detected

• Prevents faults caused by low or inconsistent flow

• Contributes to energy efficiency and system protection

• Built to withstand high-pressure, high-temperature conditions

• Designed for easy installation and direct replacement

Compatible Grant Boiler Models

• Grant VTXCOMBI21 Indoor

• Grant VTXOMCOMBI21 Outdoor

• Grant VTXCOMBI26 Indoor

• Grant VTXOMCOMBI26 Outdoor

• Grant VTXCOMBI36 Indoor (after 15.05.08 only)

• Grant VTXOMCOMBI36 Outdoor (after 15.05.08 only)

When to Replace the Flow Switch

• Boiler fails to fire when hot water is demanded

• Inconsistent or no domestic hot water supply

• Flow-related fault codes or error indicators

• Physical damage, corrosion, or blockage in the existing switch

Technical Specifications

• Part Number: MPCBS17X

• Type: Flow detection switch

• Application: Domestic hot water activation

• Voltage: 230V AC

• Manufacturer: Grant UK

A key component for dependable hot water delivery in Grant Vortex Combi systems. Supplied as a genuine Grant part by Heating-Parts.co.uk – your trusted source for boiler spares.