My son has just taken possession of a house where the wc drop valve is letting by and clearly in need of a new sealing washer. Unfortunately the former owner left no information on anything in the property and I can't see any ID on the valve itself. Searching images on Google and in an online spares specialist yielded valves similar in appearance but not exactly the same. Nor can I see how to separate the 'plunger' in order to remove the old washer to show my local plumber's merchant. Any help much appreciated.
