Please could you quote me for repairing a boiler we would require an "O" ring kit for main heat exchangers and diverter valve to be replaced? This boiler is over 10 years old so there maybe other leaks once these have been fixed. We would also require the boiler in the gent's toilet changing to a combi boiler and the pipework for the kitchen, hallway and meeting room capped at the kitchen and re-piped to the new boiler in the gent's toilets.