Proper operation of the water and sewage system ensures comfort and convenience of use. More and more people decide to install a concealed cistern because it saves water and thus reduces fees. It is also environmental protection. Concealed cisterns work quietly. However, like everything else, they can be damaged. Today we will tell you how to replace the drain valve in a concealed cistern.
Check the drain valve at the Onninen wholesaler
What is the function of the drain valve?
The drain valve serves an extremely important function. It is worth knowing that this element is responsible for the proper operation of the cistern, because without it, water flushing would not be possible. You should also know that the valve is subject to various factors, including high water pressure, but also the frequency of use, which may result in its faster operation. The main role of the valve is to cause the water to flush. This is most often done by pressing a button. The drain valve is also responsible for setting the float to fill the tank. Thanks to it, you can regulate the flush, so the drain valve is an integral part of the entire flush mechanism. It can operate in two modes: small and large flush. It can also be equipped with a stop function.
Replacing the drain valve in a concealed cistern step by step
Remember that if you press the flush button and nothing happens or the water drains very slowly, the drain valve needs to be replaced. Also check if the float is not loose. If not, you will probably need to replace the drain valve. You can replace the concealed valve yourself and, contrary to appearances, it is not that difficult
Step one: remove the flush button
At the very beginning, you need to remove the flush button, because only then can you get to the flushing mechanism. So we unhook the flush button. Do this very carefully so as not to damage this element. Then we put it in a safe place and then we can move on to step two. Removing the flap is best done using a screwdriver. This way you will speed up your work.
Step two: pull out the flush mechanism
Once the safety flap is removed, the entire flush mechanism is visible. There is not much room for maneuvering in concealed toilets, so it is best to remove the entire mechanism. This will make replacing the drain valve easier. The flush mechanism is mounted with locks, which you just need to turn and it's ready. Now you can accurately assess the condition of the drain valve and if it is permanently damaged, it needs to be replaced. Of course, it may also turn out that it does not work properly because it is simply contaminated. In this case, simply clean it.
Step three: replace the drain valve
Now all you need to do is remove the old mechanism by unscrewing the plastic nut at the base. The next step is to install a new drain valve. Remember to properly position the moving elements. Seals still need to be placed at the base. Thanks to this, you will gain even better waterproofness. After dismantling the pushers, press the levers located on both sides of the plate covering the inspection hole. Then we can hold down the button which opens the drain valve. We take the console up and tilt it towards us. This way you will remove the valve even faster and more safely. Put a new one in its place and rinse off the accumulated sediment, if any. The drain valve is properly installed when the lock engages.
Step four: mount the console
Most of the work is already behind you. All that remains is to mount the console. Hook the hooks hanging at the back and check whether the valve rises and falls. Then you insert the cover plate and attach the frame by inserting the pins into the holes.
Drain valves at the Onninen wholesaler
In the Onninen hydraulic and electrical wholesaler you will find drain valves from renowned manufacturers. We can recommend you top 3 functional and water-saving models.
Top 1: Economy drain valve with Alcadrain alloy
The economical drain valve with Alcadrain alloy is worth attention. This is a universal valve for a ceramic cistern. It is equipped with a start/stop function. For even greater convenience, the manufacturer allows the button to be positioned off-axis. This model is made of damage-resistant ABS plastic.
Top 2: Geberit Type 240 two-way drain valve
A good choice will also be the Geberit type 240 two-seat drain valve . This is an extremely functional model that allows you to: 
regulation of flushing with both large and small amounts of water. It is durable, resistant to mechanical damage and matched to Geberit sets.
Top 3: Side-fed filling valve with metal tip, universal Alcadrain
Our list also includes a side -fed filling valve with a metal tip, thread diameter 1/2" and 3/8" universal Alcadrain . It is compatible with all Alca system concealed cisterns. It shows little sensitivity to pressure differences in the water supply network. For even greater work efficiency, it has a built-in filter that captures dirt, which ensures greater durability