The majority of the newer more modern styles of WC systems are not big enough to use the more traditional ball float syphon flush mechanism. This means that the inlet valve is a modified diaphragm type with a very short float arm, and miniature float, or a more innovative vertical valve that uses a float cup fitted round the central column of the valve’s body. Vauxhall Plumbers have all the expertise to carry out all plumbing work. Both are very quiet, however the float cup will be slow to fill the cistern if it is fed from a storage tank. In the slimmer more modern systems the old syphon flushing method is now replaced by a plastic valve operated flush mechanism that is operated by button fitted in the cistern lid. This also incorporates an over flow. The button is in two parts, depressing one part for a short low volume flush and both together for a full volume flush. The button is linked to the plunger rather than the older style wire link float arm system. The Valve Design is very ingenious but can be very tricky to make adjustment for a correct fit so when installing the valve must be adjusted so that the critical level on the body of the valve is at least 25mm above the top of the overflow pipe. There is a threaded shank at the base of the valve assembly which gives the relevant adjustment so that correct positioning can be achieved. Guaranteed installation work for this equipment can be carried out by a Vauxhall Plumber. It is a good idea to keep any instructions and drawings regarding the unit should you need to replace a defective seal at some point. The inlet valve consists of a rubber ring seal at the base of the cistern which will probably need to be replaced in time but with spares available should not cause any issues.