Vaillant 0020010291 Service Cock & 0020010295 Water Inlet Valve – Boiler Replacement Parts

Maintain or repair your Vaillant boiler with the Vaillant 0020010291 Service Cock and 0020010295 Water Inlet Valve.

These replacement components are suitable for selected Vaillant ecoTEC plus and ecoTEC exclusive combi boilers. They help control water flow during boiler servicing, installation and repair, supporting reliable system operation.

Vaillant 0020010291 Service Cock Compatibility

The service cock is also compatible with selected ecoTEC plus 832, 835, 837, 838, 937 and 938 VUI/VUW models, including applicable revision versions.

Vaillant 0020010295 Water Inlet Valve Compatibility

The water inlet valve is also compatible with selected ecoTEC plus models manufactured between 2005 and 2017, including:

• 824 VUW 246/3-5, revisions R1–R4
• 825 VUW 256/5-5 R4
• 831 VUW 316/3-5, revisions R1–R5
• 831 VUW 316/5-5 NG and LPG versions
• 835 VUW 306/5-5 and 356/5-5
• 837 and 838 VUW 376/5-5 and 386/5-5
• ecoTEC plus 937 and 938 VUI models, including 376/5-5 and 386/5-5

Important Compatibility Check

Before placing your order, check that your existing components match the relevant manufacturer part numbers:

• Service Cock: 0020010291
• Water Inlet Valve: 0020010295

Vaillant Boiler Spares

For other Vaillant products, please follow the relevant Vaillant Spares link.

For replacement diverter valves, use the Vaillant Diverter Valves link.

To browse compatible circuit boards, follow the Vaillant PCBs link.

For replacement pumps, use the Vaillant Pumps link.

For replacement fans, follow the Vaillant Fans link.

Prices

All listed prices are inclusive of VAT.

Returns

At Heating and Catering Parts, we aim to provide a reliable and straightforward customer experience. We understand that a product may occasionally not meet your requirements, which is why we offer a comprehensive 30-day return policy.

Please read our full Return Policy for eligibility requirements and return instructions.

Delivery

Orders received before 3:00 PM, Monday to Friday, are usually dispatched on the same day. Each order is packaged carefully to support safe and dependable delivery.

Weekends are not included in the next-day delivery guarantee. Orders placed on Friday using next-day delivery will normally arrive on the following Monday.

For weekend delivery, select the Saturday delivery option at checkout.

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