Constant flowing of water in toilet cistern

rayjdav

Hi,

I put in a new flow valve yesterday in wc. It was leaking at the seal at the water inlet to the underside of the cistern, so simple change over.

Now, there is a constant flow of water into the pan and the cistern is not filling up. Leak is gone but this issue is as big a problem. I turned the mains off under the sink as some amount of water flowing out and no one there all day. Was not there before.

It is a button flush with a cable to the flush valve. I assume it is an easy fix but I don't know where to even start. The flapper valve I think is not sitting correctly???

Any quick fix appreciated.

Thanks

embracingLife

You have to set the float to a specific level to stop the cistern filling once the water has got to a level in the cistern just below the level of the overflow. You obviously did not set this to stop the water once the cistern is full and just below the level of the overflow.

So the water is filling up above the overflow level and as the design of the flush valve the overflow directs the water internally into the flush valve and this is why the water is flowing into the toilet bowl/pan.

Read the instructions on the valve and it will explain how to set the float so the water valve stops once the water level is high enough in the cistern. All the different floats have different ways to adjust the level of water so the float stops just below the overflow on the flush valve.

Usually you set the float so the water level is the same as the water level of the previous flush valve, you will just about see a faint line across the back of the cistern where the water level stopped. You should match the float so that the volume of water inside the cistern is sufficient to flush the toilet fully after each use. Not recommended to set the float lower as there won't be enough water to flush the toilet properly.

There's several types of flush valves so there's no way to know what brand of one you got. I'm not going to find the type of valve you got so go read the instructions that came with it.

embracingLife

Also you said that you "turned off the mains under the sink", is that the kitchen sink or the wash basin in the bathroom which some people call the "sink" as well.

Does it stop the water going to the toilet?

Usually (99%of the time) the mains valve under the kitchen sink is only for the cold tap in the kitchen sink and it does not stop the water which goes up to the tank in the attic in a house or a utility room in an apartment and instead there's a separate valve going to the water tank. So it's better to identify where the stop valves in your property is.

It'd be helpful to see how this "mains under the sink" affects the water supply to your toilet?

embracingLife

Re reading your post, yes the "flapper valve" is not sitting correctly - called a "float valve" here in Ireland /UK.

Are you in the USA or somewhere else? Or from another country?

rayjdav

The Flapper/Float valve was not returning to the closed position. Took it out, clean it down, but no joy. Simple solution was to replace. 2 minutes...

The valve under the sink does stop cold supply to the full house.

embracingLife

Well I was giving all the options as to why the water was overflowing into the toilet pan.

Good you got it sorted, I'm not a mind reader.