Toilet- water constantly running in to bowl

[opps]

Hi all,

My loo has water running in to the bowl all of the time.

The cistern is concealed behind a tiled wall with access via the push button plate.

From memory, I think it is this Oli cistern.

https://www.oli-world.com/en/catego...nic-------------------/#Assembly Instructions

Every 30 seconds the cistern tops up for 2 or 3 seconds. Is it safe to assume that I just need to replace the outlet valve seal (part number 2 in the following PDF).

https://www.oli-world.com/download/190712050932657.pdf

 

[just pumps]

Haven`t open the attachment but could be the fill valve not closing and water overflowing out as well.

 

[opps]

Haven`t open the attachment but could be the fill valve not closing and water overflowing out as well.

Thanks for the reply.

If it was the inlet valve not closing, wouldn't that mean that the cistern would be constantly filling? At the moment I can only hear the water entering it every 30 seconds.

 

[terryplumb]

Looks like it ,but not the best of instructions. I can't tell if that seals between the valve base and cistern ,or it seals the outlet of the end of the drop valve. I think its the latter.

 

[opps]

Looks like it ,but not the best of instructions. I can't tell if that seals between the valve base and cistern ,or it seals the outlet of the end of the drop valve. I think its the latter.

my (lay) understanding is that it seals the outlet of the drop valve. I have watched a couple of their slightly generic and non english videos. Unfortunately I cannot speak Italian...

If it has started to perish, would it result in water in the cistern running in to the bowl?

The rubber washer is only a couple of quid, the postage is more expensive but if you or someone else more knowledgeable than me says order it, I shall.

I'd rather do that than replacing the whole "drop" mechanism.

 

[terryplumb]

To answer your question ,yes ,water would continue to run into the toilet pan if the seal is blistered/ deformed etc . And the fill / float valve would open to top back up.
For a few quid its worth buying a new seal.
If you isolate the water supply ,and remove the drop valve ,you can inspect the seal.

 

[opps]

Thanks terryplumb, I shall order a new seal.