Main Combi System Gas Valve – Fully Refurbished | Part No. 5107339

Ignition failure, unstable flame, or a boiler that drops out repeatedly are common symptoms of a failing gas valve in Main Combi and System boilers. This component controls gas flow to the burner, and when it deteriorates, consistent heating and safe combustion both suffer. The Main Combi System Gas Valve (Part No. 5107339) is the fully refurbished direct replacement, restoring reliable gas regulation across the Main Combi 24 HE, Combi 30 HE, and HE System 18/24/28 ranges.

This unit is fully refurbished — removed from a working boiler, quality-checked to the highest standard by our experienced engineering team, and verified for correct operation before dispatch. Minor cosmetic marks may be present, but all functional performance is confirmed. Supplied with a full 12-month warranty.

Compatible Boiler Models

Fully Refurbished. Quality-Checked. 12-Month Warranty.

Every refurbished Main gas valve we supply is quality-checked to the highest standard by our experienced engineering team before dispatch. This 5107339 unit is a direct fit for the Main Combi and HE System range, resolving ignition and combustion issues caused by a worn or failing valve. Supplied with a full 12-month warranty.

Delivery & Returns

Orders placed before 1:00 PM (Mon–Fri) are dispatched the same working day. Standard and next-day delivery available at checkout. Returns accepted within 30 days in original unused condition.

Note: Please confirm that part number 5107339 matches your existing gas valve before ordering. Installation must be carried out by a Gas Safe registered engineer to ensure safety compliance and warranty validity.