Repair a concealed cistern and what to pay attention to

A concealed cistern is usually nice to look at, even if it is normally hardly paid attention. However, this can change very quickly if the water does not stop running or if the flush does not work anymore. Repairing a concealed cistern is a bit more complicated than using a plaster mounted model.

Among the most common problems with cisterns

Once a flush-mounted cistern has to be repaired, this is usually due to the same defects as worn seals or valves. However, you can only take a closer look at it once it has been opened. For many models, the covers can be removed easily by sliding them up or to the right and then pulling them off. The frequently occurring problems are then usually already visible:

  • Deposits on moving parts
  • Dirt that occurs over the years
  • Wear on certain components or seals

If important components such as the angle valve or the filling valve become unusable, the flushing can run permanently. Also, different seals or moving elements on the mechanics can be a problem.

When the water stops running

One of the most common defects is the flowing water, which is indicated by a constant noise. The cistern does not run full again in this case, for example because of a malfunctioning flushing mechanism. If this problem occurs, you must first remove the actuator arm so that the water can run off and you can closely examine the components of the cistern. But do not forget to turn off before the water inlet at the angle valve. Using a flashlight, you can usually detect defects or worn seals relatively easily.

What you should keep at the repair

Tools such as a flashlight, a screwdriver, special cleaner or a water pump pliers should be available in any case. Of course it depends on the defect that you need exactly for a repair. If you have the most important utensils, replace worn or calcified seals and replace them with matching new copies. As a rule, there is a seal at the top inlet and the other at the bottom of the box at the outlet. If necessary, it is also sufficient to clean or decalcify the seals.

Common causes of error: the float or broken valves

If the water runs continuously into the toilet bowl, this indicates a defect in the float. It serves to keep the water in the cistern at a constant level. If this does not work, you should first check it and make it workable if necessary. Do not forget that these parts are often made of plastic and can therefore easily break. For heavy soiling, it is best to remove it and thoroughly clean it of limescale or other contaminants. Defective valves such as the inlet valve are also common causes of faults. These parts should either be cleaned or replaced.

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