Tundish streaming cold water

[tmf786]

I noticed the tundish is streaming cold water.

I emptied the radiators and opened the hot tap.
I shut off the valves (blue and red ones in the photo)

When I shut off the blue ones the water stops streaming. Either one of them on starts streaming again

The pressure in the expansion valve was empty so I pressurised with a foot pump to 1 bar.

Turned on the valves again and the water kept steaming.

The expansion vessel is factory pre charge 3bar, zilmet 18ltr type 19. The manual only shows the pre charge, I believe the set pressure is according to height.

Could it be likely the expansion vessel needs replacing or just needs to be set to 3bar?


Thank you

 

[Madrab]

The EV will require a higher pre-charge and no it's got nothing to do with height. The water shouldn't be streaming through the tundish though so there may other issues too, PRV may need looked at .

I would really advise that you get someone in that's qualified in Unvented Systems to service your cylinder and it's ancillaries properly.