Water tank constantly filling up

[Mark A]

Hello all, I think I've suddenly become an accidental plumber although do have a professional Unvented engineer coming to my property. but not till next week

Does anyone know why a heated water tank would take on water 24/7 ? is this normal for an unvented tank (Range HE Tribune)

• no one is using the water
• no leaks around the tank
• no water leaking into the overflow (nothing in the tundish)

I have left it off overnight and its now not pulling any water

 

[Deleted member 120897]

This post is confusing. Are you saying it’s heating up all the time or just constantly filling?

 

[MarkAD]

This post is confusing. Are you saying it’s heating up all the time or just constantly filling?

constantly filling when its immersion is on and water is heated with no sign of it going to the tundish so no idea where it could be going, when i switch it all off the water stops when its cooled down, also water is extremely hot... there is no leak I can see

 

[Deleted member 120897]

If there’s no water evident at the tundish, and not going anywhere else, how do you know it’s filling? Could it not just be the immersion kettling?

 

[Last Plumber]

I can't follow this!
Are you hearing something and thinking it's filling?