How To Fix A Wall Hung Toilet Cistern

Wall-hung toilets with concealed cisterns give bathroom a sleek modern look and free up valuable space in your bathroom which is especially handy if yours is on the smaller side. But how do you fix and maintain a cistern when its hidden away and tiled into a wall?

All toilets at some point require servicing. With a standard toilet its as simple as lifting the cistern lid and you can see everything, a concealed system is different because, of course, it's in the wall.

In the video below, Roger Bisby of Skill Builder demonstrates how easy this process is using the Abacus Bathrooms 1.8m wall-hung WC and cistern. Without the use of any tools, it's very easy to strip down the inside mechanisms to carry out any servicing and repairs that may be needed.

Water Running in Wall Hung Toilet After Flush

If you noticed that the water in your toilet is still running after a flush. This may happen for a possible three reasons, either the fillvalve / float is stuck and the cistern is filling to the point of the overflow, the seal of the flush valve is not sealing fully or the fill valve has been set to high and is overfilling the cistern. Either one of these issues will produces a slow leak into the toilet bowl.

Stuck Fill Valve

The first sign the your fill valve is stuck is that the volume of water entering your toilet can be quiet large, you will hear the fill valve constantly running. The main reason of this issue is limescale or dirt build up in the cistern on the float / fill valve and can be solved in the following ways.

Solution One: Flush the toilet fully, a couple of times, forcing the fill float to drop to the bottom and back up, this can dislodge and breakaway any lime scape that may have built up. If this does not solve the issue try solution two.

Solution Two: Remove the flush plate and access the internals of the cistern. At this point you will be able to identify if the fill valve is stuck as you will see the water running and entering the overflow. If the water is not entering the over flow then the problem lies with the flush valve and not the fill valve. If the fill valve is stuck and is overflowing the cistern, Remove the fill valve (as per your cisterns instructions, ensure water is turned off) and inspect the float and valve and check the operation of the float by moving it up and down. Clean the fill valve and refit. If this does not solve the issue try solution three.

Solution Three: Adjust the float on the fill valve, If you adjust the float on the fill valve to reduce the amount of water required to fill the cistern, the increase force as the water level rises on the fill valve, can help close the valve fully. Try lowering the float to reduce the amount of water needed to close the valve. If this does not help move onto solution four.

Solution Four: Replace the fill valve. Unfortunately you will need to replace the fill valve.

Faulty Flush Valve

If you have a faulty flush valve, the tell tail signs are that the water is dripping or a very small trickle into the toilet bowl and you will hear the fill valve refill the toilet inconsistently. The amin cause of this is buildup or dirt or limescale. This can be fixed with the following three solutions:

Solution One: Flush the toilet fully, a couple of times, forcing a full flush can dislodge and breakaway any lime scape that may have built up. If this does not solve the issue try solution two.

Solution Two: Remove the flush plate and access the internals of the cistern. At this point you will be able to identify if water running and entering the overflow. If the water is entering the over flow then the problem lies with the fill valve and not the flush valve. Remove the flush valve (as per your cisterns instructions, ensure water is turned off) and inspect the flush valve seals and check the operation of the flapper on the bottom by moving it up and down. Clean the flush valve and refit. If this does not solve the issue try solution three.

Solution Three: Replace the flush valve. Unfortunately you will need to replace the flush valve.

Wrong Water Level

If the water level in your toilet's tank is too high, the toilet may be overflowing, you can adjust you float to reduce the amount of water required to close off the fill valve. 

How To Fix A Geberit Wall Hung Toilet

In the above video you will see how to repair a Geberit wall hung toilet frame. You will see the process is very silumal with this Geberit Cistern and the Abacus cistern shown earlier. Your cistern will be fixable in a simular method.

We hope you find this information helpful. At Rubberduck Bathrooms we offer a wide range of wall hung toilets, Wall Hung Toilet Fixing Frames and a wide range of concealed cisterns to make your bathroom sleek and modern.