Overflow pipe leaking from megaflow

[psd99]

Hi just noticed when my boiler runs it appears that There is an overflow pipe that leaks outside on to the ground.

What could be the potential fix here?

 

[psd99]

I have not done that for a while

i will give that a go thanks

how often does it need to be done?

 

[psd99]

Yes so assuming that method does not fix it
What are the other potential fixes or problems
Here!

more context
To follow tomorrow.....

 

[psd99]

so I replaced a tap recently (another thread), and the tap makes an annoying whistling sound so I closed the iso valves on hot and cold down a bit to reduce the noise.

I think this resulted in water going back out of the pipe to outside from the megaflow as I increased the valves to the tap and the problem seems to have stopped.

why would it leak like this when the tap's iso valves are reduced?

 

[psd99]

hey so the actual tundish did not feel very wet that's what I could not workout.

but there was definitely water spilling in the pipe that goes out into the wall. I could hear a little drip when the boiler was running, it sounded like the water was dripping to outside.

Looks better today there is no puddle. but what do u think it could have been?