Boiler spare parts must be fitted by a certified Gas Safe engineer. Orders received before 4pm are usually dispatched for next business day delivery. The Ideal gas valve kit is employed in the distribution of gas. When gas is required in the burner, the printed circuit board sends a signal to the gas valve, which opens to allow gas to flow into the burner or the pilot assembly. Ideal Part Number: 175562 Honeywell Reference: VK4115V1352. Fits Ideal Independent Boilers and Ideal Logic Boilers.