Grant Non Return Valve Combi Post April 2011 Mpcbs81B

Grant Non Return Valve Combi Post April 2011 Mpcbs81B

Grant Non-Return Valve – MPCBS81B

Genuine Check Valve for Grant Combi Boilers Manufactured Post-April 2011

Keep your Grant combi boiler operating safely and efficiently with the Grant Non-Return Valve – MPCBS81B. This genuine check valve is designed to prevent reverse flow of water within the domestic hot water (DHW) system, protecting the boiler from potential backflow contamination and ensuring directional flow is maintained.

Specifically designed for Grant Combi boilers manufactured after April 2011, the MPCBS81B is a critical component in maintaining hot water system integrity. Whether you're replacing a failed valve or carrying out routine servicing, this OEM part guarantees performance and peace of mind.

Key Features & Benefits

• Genuine Grant Part – MPCBS81B
  Manufacturer-approved for guaranteed compatibility and safety.

• Prevents Reverse Flow
  Allows water to flow in one direction only, protecting the combi boiler from backpressure or contamination.

• Essential for DHW Circuit
  Maintains proper water flow through the domestic hot water section of Grant combi boilers.

• Robust & Long-Lasting Design
  Constructed with durable, heat- and pressure-resistant materials to withstand daily use.

• Easy to Install
  Designed for a direct fit with post-April 2011 Grant Combi models—ideal for heating professionals or confident DIY users.

Compatible Grant Boiler Models

The MPCBS81B Non-Return Valve is compatible with:

• Grant Vortex Pro Combi 21kW (post-April 2011)

• Grant Vortex Pro Combi 26kW (post-April 2011)

• Grant Vortex Pro Combi 36kW (post-April 2011)

Not sure if your boiler was manufactured post-April 2011? Check your boiler's serial number or contact our support team—we’ll help you confirm compatibility.

 When to Replace the Non-Return Valve

Replace the non-return valve if:

• You're experiencing fluctuations in DHW pressure or temperature

• The valve is leaking, blocked, or visibly damaged

• Water is flowing backward into the boiler, causing performance issues

• You're carrying out a routine DHW system service or component upgrade

Failing to replace a faulty check valve can lead to system inefficiencies, loss of water quality, or even boiler damage.

Technical Specifications

• Part Number: MPCBS81B

• Manufacturer: Grant UK

• Type: Non-return valve (check valve)

• Application: Domestic hot water circuit on Grant Combi boilers

• Compatibility: Combi boilers built after April 2011

• Material: Brass or high-grade polymer with internal flap or spring mechanism

• Connection Type: Push-fit or threaded (varies by model – consult manual)

A component installed in Grant oil-fired boilers. It functions as a one-way valve that allows the flow of oil in one direction while preventing it from flowing backward. The non-return valve ensures a consistent and uninterrupted supply of oil to the burner, preventing fuel leakage and maintaining efficient boiler operation.

Compatible with the following boilers:

The Grant non return valve is compatible with all Vortex combi after april 2011