ATAG Gas Valve Replacement – Used | Part No. S4751900

Inconsistent ignition or irregular gas flow in an ATAG A200S, A203C, A320S, A325C, A325ECX, or XL series boiler is often a sign of a worn gas valve. The ATAG Gas Valve, Part No. S4751900, is the genuine replacement that regulates the flow of gas to your boiler's burner, restoring safe ignition and efficient heating performance.

This is a used, fully tested part, removed from a fully working boiler and thoroughly inspected by experienced engineers. While minor cosmetic marks may be visible, the valve operates to manufacturer standards.

Compatible Boiler Models

Tested by Engineers. Backed by Warranty.

This used ATAG gas valve has been carefully removed from a working boiler, cleaned, and tested by a professional engineering team before dispatch. It restores proper gas flow and ignition, helping resolve ignition faults while saving money over a brand-new part. Supplied with a 6-month warranty for added confidence.

Delivery & Returns

Order before 1:00 PM (Mon–Fri) for same-day dispatch, with standard, next-day, or Saturday delivery available at checkout. Returns are accepted within 30 days in original condition; for non-faulty returns, the buyer covers return postage.

Important Safety Note: Please confirm that part number S4751900 matches your existing unit before ordering. Gas valves must always be fitted by a Gas Safe registered engineer to ensure safe, correct installation and proper boiler operation.

Stock Notice: Only 1 unit remains in stock at the source at time of writing — please verify current availability before publishing live or set up a low-stock alert.