Boiler Spares

Genuine Baxi 7690350 Printed Circuit Board (PCB) for compatible 28kW combi boilers. This replacement boiler PCB controls key electrical and electronic functions within the heating system and is suitable for selected Baxi Duo-tec, Platinum, Gold, Promax and Titanium boilers. Ideal for professional boiler repair and maintenance.

The Baxi / Potterton Printed Circuit Board (PCB) Kit, part number 5111603, is a replacement electronic control component for compatible Potterton Suprima boilers.

The PCB is responsible for managing and controlling key boiler functions. This replacement kit is designed for selected Suprima 30 to 100 models. Please check your existing PCB part number and boiler model before ordering to ensure compatibility.

The Baxi Huba Pressure Transmitter 5107764 is a genuine replacement air pressure switch designed for Baxi Powermax boilers. This essential boiler safety component monitors fan operation and air pressure levels to help prevent unsafe gas build-up. Working alongside the boiler PCB, it ensures all critical safety checks are met before ignition, supporting reliable and efficient heating system performance.

The Baxi 5132454 Hydraulic Inlet Assembly (12 Litre) is a genuine replacement component designed for use with the diverter valve system in a range of Baxi boilers. Compatible with Duo-tec, Duo-tec ErP, Platinum, Platinum ErP, Main Eco Elite, Gold, Heatmax, and Promax models, this part ensures reliable water flow control and efficient system performance. Ideal for boiler servicing, repairs, and maintenance work.

Genuine Baxi 7224343 3 Way Valve Assembly Kit for compatible Combi, Performa and Main Combi boilers. This replacement diverter valve directs hot water between central heating and domestic hot water systems. Replaces part number 248062.

The Baxi 248229 Connection Tail is a replacement plumbing component designed for use with the isolation valves fitted to a wide range of Baxi, Main and Potterton boiler models.

This 22mm angled connection tail forms part of the pipework connection beneath the boiler, allowing compatible isolation valves to connect with the heating system. Isolation valves provide a convenient way to control water flow into the appliance and allow the supply to be shut off when carrying out maintenance or dealing with a leak.

Suitable for a wide selection of Baxi heating appliances, including Combi, Duo-tec, Megaflo, Platinum and System ranges, as well as selected Main and Potterton models.

Always check the existing part number, pipe configuration and exact boiler model before ordering.

The Baxi 245122 Full Gas Valve is a replacement boiler component responsible for regulating the supply of gas to the burner during boiler operation.

Controlled by the boiler's printed circuit board (PCB), the gas valve opens and regulates gas flow when required, helping ensure the correct amount of gas is delivered to the burner. It plays an essential role in the boiler's combustion process and safe operation.

Manufactured by Honeywell for Baxi, this full gas valve is supplied under Baxi part number 245122 and is intended for compatible boiler applications.

Always check the existing component part number and boiler model before ordering to ensure the correct replacement is selected.

The Baxi 248047 Heat Exchanger is a replacement component designed for selected Baxi Combi boilers, including the Combi 80E and Combi 80 Maxflue.

The heat exchanger transfers thermal energy from the boiler's burner to the domestic hot water supply, allowing hot water to be delivered when required. Suitable for domestic boiler maintenance and repair, this replacement part can help restore hot water operation where the existing heat exchanger is faulty.

This genuine Baxi 3-way diverter valve assembly (248727) is designed for use in Baxi Combi Instant boilers including 105, 105 HE, 80 and 80E models. The diverter valve directs hot water between central heating and domestic hot water systems, ensuring efficient combi boiler performance. Ideal for boiler repairs and servicing.

This genuine Baxi 3-way diverter valve assembly (Part No. 7224765) with bypass is designed for use in Baxi, Main and Potterton combi boilers. It directs boiler output between central heating and domestic hot water systems, helping resolve common heating and hot water changeover faults. A reliable OEM brass replacement for efficient boiler performance.

The Baxi 7224763 3-Way Valve Assembly with Bypass is a replacement hydraulic component designed for compatible Baxi combination boilers.

The three-way valve plays an essential role in the operation of a combi boiler, directing heated water between the central heating circuit and the domestic hot water supply as required. This allows the boiler to provide heating and hot water from a single appliance without the need for a separate hot water storage cylinder.

This assembly is supplied with an integrated bypass and includes replacement washers, making it a practical replacement component for compatible boiler servicing and repairs.

Always check the existing part number and exact boiler model before ordering to ensure compatibility.

The Baxi 7224764 3-Way Valve Assembly Without Bypass is a replacement boiler component designed for selected Baxi, Main and Potterton appliances.

The three-way valve forms part of the boiler's hydraulic system, directing heated water between the central heating circuit and domestic hot water circuit as required. This allows compatible combination boilers to provide heating and hot water from a single appliance.

Supplied without a bypass, this replacement assembly includes diverter valve washers and seals to support the installation and replacement process.

Suitable for selected appliances across the Baxi, Main and Potterton ranges. Always check the existing part number and exact boiler model before ordering.

The Baxi 5107339 Gas Valve Assembly is a replacement gas valve designed for selected Baxi, Main and Potterton domestic boilers.

The gas valve controls the flow of gas to the boiler's burner, helping regulate the gas supply required for safe and effective combustion. This replacement assembly is intended for compatible boiler models as part of servicing and repair work.

Before ordering, check the appliance model and existing component part number to confirm compatibility.

The Baxi 5114718 3-Way Valve Assembly is a replacement hydraulic component designed for selected Baxi combination boilers.

The diverter valve plays an essential role in the operation of a combi boiler by directing heated water to either the central heating system or the domestic hot water (DHW) circuit. This allows the boiler to provide heating to radiators and hot water to taps from a single appliance, without the need for a separate hot water storage cylinder.

Suitable for selected models across the Baxi Gold Combi and Promax Combi ranges, this replacement assembly is an important component for compatible boiler servicing and repairs.

Always check the existing part number and exact boiler model before ordering to ensure compatibility.

The Baxi Automatic Air Vent 248043 is a replacement boiler component designed to release trapped air from compatible central heating systems.

Air can accumulate within a heating system and affect circulation and performance. An automatic air vent helps remove this trapped air, supporting efficient system operation and reducing the need for manual venting.

Suitable for a range of Baxi, Main and Potterton boilers, this replacement part is intended for compatible appliance maintenance and repair.

The Baxi Avanta PDK 93° Elbow (part number 5121369) is a white plume‑displacement flue bend engineered for seamless integration with Baxi flue and boiler systems. Designed for easy installation, this 93° elbow enables flexible flue routing - especially useful in tight spaces or complex boiler layouts. Compatible with Baxi Multifit flue systems and a wide range of domestic boilers, this compact elbow ensures a neat, secure flue connection and reliable performance.

The Baxi Combustion Chamber Gasket 5114755 is a replacement sealing component designed for selected Baxi and Potterton boilers.

Fitted within the boiler's combustion chamber, the gasket helps create a secure seal to prevent the escape of combustion gases and fumes. It is an important component for maintaining the integrity of the combustion chamber and supporting safe boiler operation.

Suitable for a range of compatible Baxi and Potterton appliances, this replacement gasket is intended for boiler servicing and repair.

This genuine Baxi 248838 DHW/Diff diaphragm is designed for use in Baxi Combi Instant and Performa boilers. It plays a key role in regulating domestic hot water flow and ensuring efficient boiler operation. A reliable replacement part for servicing and repairing compatible Baxi combi boilers.

The Baxi Domestic Hot Water 10 Plate Heat Exchanger (7225724) is a genuine Baxi replacement spare part, supplied with four gaskets.

Designed for domestic hot water applications, this heat exchanger transfers thermal energy between water circuits within a compatible boiler system. It is a secondary heat exchanger component used in combination boilers, helping provide domestic hot water.

The Baxi Domestic Hot Water 16 Plate Heat Exchanger (7225723) is a replacement heat exchanger designed for selected Baxi, Main and Potterton combi boilers.

The plate heat exchanger transfers heat from the boiler's primary heating circuit to the incoming domestic water supply, providing hot water for taps and showers without the two water circuits mixing. Replacing a faulty heat exchanger can help restore domestic hot water performance where the original component is damaged or no longer operating correctly.