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Vaillant

GermanyBoiler Spare Parts

Vaillant is a German manufacturer of heating and hot-water systems, with a product portfolio that spans condensing boilers, heat pumps, solar thermal components, and associated controls. The brand operates across residential and light commercial applications, with boiler product lines including the VC, VCW, VM, VMW, WM, and WMW series—each designed for specific heating capacity and installation configurations. These parts are designated to original Vaillant equipment specifications, enabling technicians and maintenance teams to maintain system performance and compliance with manufacturer design standards. The spare-parts inventory covers both older and current generation boiler models, with each component cross-referenced to Vaillant part numbers for precise identification. Vaillant boiler systems operate across heating and domestic hot-water circuits, necessitating reliable supply chains for differential switches, pressure relief mechanisms, and circulation pump assemblies that regulate flow and pressure stability. The modular design of Vaillant boilers means individual components—locking clips, check valves, electronic control boards—can be sourced and replaced without requiring full-unit replacement, supporting cost-effective equipment maintenance.

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About Vaillant

Vaillant is a German manufacturer of heating and hot-water systems, with a product portfolio that spans condensing boilers, heat pumps, solar thermal components, and associated controls. The brand operates across residential and light commercial applications, with boiler product lines including the VC, VCW, VM, VMW, WM, and WMW series—each designed for specific heating capacity and installation configurations. These parts are designated to original Vaillant equipment specifications, enabling technicians and maintenance teams to maintain system performance and compliance with manufacturer design standards. The spare-parts inventory covers both older and current generation boiler models, with each component cross-referenced to Vaillant part numbers for precise identification. Vaillant boiler systems operate across heating and domestic hot-water circuits, necessitating reliable supply chains for differential switches, pressure relief mechanisms, and circulation pump assemblies that regulate flow and pressure stability. The modular design of Vaillant boilers means individual components—locking clips, check valves, electronic control boards—can be sourced and replaced without requiring full-unit replacement, supporting cost-effective equipment maintenance.

Common Applications

  • Residential heating maintenance — Safety thermostat VC-VCW180 (part 253511) for VC/VCW boilers
  • Light commercial hot water systems — Gas check valve MAG125/7.5017H (part 012157) for gas flow regulation
  • Boiler service and repair — Magnetic tip MAG125/7 (part 170255) for gas valve assembly
  • Multi-family building heating — Butane gas injector set mag15 for burner calibration
  • Industrial boiler retrofits — Extractor VCWF242 (part 190119) for flue gas extraction
  • Preventive maintenance programs — Micro-switch water unit (part 126223) for water flow detection
Origin: Manufactured in Germany

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Frequently asked questions

Common questions about Vaillant from 3G Electric.

What Vaillant boiler series are covered by the spare parts available through 3G Electric?

The spare parts inventory covers Vaillant boiler series including VC, VCW, VM, VMW, WM, and WMW. These series represent a range of heating capacities and installation configurations, from combi boilers to system boilers. Components such as safety thermostats, gas check valves, magnetic tips, and micro-switches are cross-referenced to original Vaillant part numbers, ensuring compatibility with specific models. For example, the safety thermostat VC-VCW180 (part 253511) is designed for VC and VCW models, while the safety thermostat 107°C (part 100376) fits VM and VMW series. This allows maintenance teams to identify the correct replacement part for their specific boiler model.

How do I identify the correct Vaillant replacement part for my boiler?

Each Vaillant component is cross-referenced to an original Vaillant part number, which is printed on the part itself or listed in the boiler's technical documentation. For instance, the gas check valve MAG125/7.5017H corresponds to part number 012157, and the magnetic tip MAG125/7 corresponds to 170255. When ordering, provide the Vaillant part number or the boiler series and model to ensure accurate matching. 3G Electric's catalog lists these part numbers alongside SKU codes, facilitating precise identification. If you are unsure, consult the boiler's service manual or contact technical support with the boiler's serial number.

Are Vaillant spare parts available for older boiler models?

Yes, the inventory includes components for both older and current generation Vaillant boilers. For example, the extractor for VCWF242 and VCWF242E (part 190119) is a component for a specific model range, and the micro-switch water unit (part 126223) is used in various older and newer units. Vaillant's modular design allows individual components to be replaced without full-unit replacement, which is particularly beneficial for maintaining older systems. However, availability may vary by part, and some components may be discontinued by the manufacturer. It is advisable to check current stock levels or contact 3G Electric for availability on specific older parts.

What is the function of the safety thermostat in Vaillant boilers?

The safety thermostat is a critical safety device that monitors boiler water temperature and interrupts the gas supply if the temperature exceeds a set threshold, preventing overheating and potential damage. Vaillant offers different safety thermostats for different series, such as the VC-VCW180 (part 253511) and the 107°C model (part 100376) for VM/VMW series. These thermostats are designed to trip at specific temperatures, ensuring the boiler operates within safe limits. Regular testing and replacement of faulty thermostats are essential for maintaining boiler safety and compliance with manufacturer specifications.

Can I replace a Vaillant gas check valve myself, or should I hire a professional?

Replacing a gas check valve, such as the MAG125/7.5017H (part 012157), involves working with gas circuits and should only be performed by a qualified gas engineer or technician. Incorrect installation can lead to gas leaks, combustion issues, or safety hazards. The check valve ensures proper gas flow direction and prevents backflow, which is vital for burner performance. If you are not certified to work on gas appliances, it is recommended to engage a professional who can source the correct part and install it according to manufacturer guidelines. 3G Electric supplies the component, but installation must comply with local regulations.

What is the role of the magnetic tip in Vaillant gas valves?

The magnetic tip, such as the MAG125/7 (part 170255) or MAG250CW-400 (part 170250), is a component of the gas valve assembly that controls the flow of gas to the burner. It operates electromagnetically, opening or closing the gas passage based on signals from the boiler's control system. A faulty magnetic tip can cause ignition failure, inconsistent flame, or gas flow issues. Replacing the magnetic tip is a common repair, and it is essential to use the correct part for your specific gas valve model to ensure proper sealing and operation. Always verify the part number against your boiler's documentation.