This type of valve is of a very clever design, but can sometimes be slightly awkward to fit in the cistern. With this in mind the rule to remember when this valve is installed is that critical level for the valve body itself should be in the region of 25mm above the overflow itself. This is achieved by an adjustment on a shank that has threads and sits at the bottom of the valve. The inlet valve float consists of a rubber ring type seal on the outside of the cistern at the base which will eventually need replacing. Most WC systems fitted today have the button flush. They can be replaced by an amateur, a Twickenham Plumber can fit all valves. But if there is any doubt, the best way is to call a plumber.

These WC cisterns cannot fit the older type of ball and float mechanisms. There inlet valves are able to be a modified diaphragm type with a very short float arm, and miniature float, or a vertical valve with a float cup that fits round the middle of the valve body. Twickenham Plumbers have experience with these devices.

The operation of these systems is really quiet, however, the cup fitted inside is slow to fill if the feed is coming from somewhere other than a mains feed.

These are very slim and modern fittings with the plastic valve operated flush mechanism being operated by a button that is fitted to, and sits flush on the top of the cistern lid. An overflow facility is also included in the design. The flush button is split into two parts, one press being for a short and low volume flush and the second being a large volume flush. There is no linkage to worry about.