Air in 2 radiators

thehopper

I have 12 radiators in a 2 storey house.
5 downstairs and 7 upstairs.
2 of my radaitors upstairs keep letting air in. Nearly once a week I have to bleed them

Its an open vented system I have

What would be causing this?

Dtp1979

thehopper wrote: »

I have 12 radiators in a 2 storey house.
5 downstairs and 7 upstairs.
2 of my radaitors upstairs keep letting air in. Nearly once a week I have to bleed them

Its an open vented system I have

What would be causing this?

More than likely a leak

scudo2

Dtp1979 wrote: »

More than likely a leak

Or pitching ?

Expansion pipe to low and it's pumping water up the expanision pipe and its adding air when it falls into the tank = air in rads.

Change pipe work in attic.

Dtp1979

scudo2 wrote: »

Or pitching ?

Expansion pipe to low and it's pumping water up the expanision pipe and its adding air when it falls into the tank = air in rads.

Change pipe work in attic.

How can the expansion pipe be too low? As in its tapped off the base of the tank or are ya on about the vent scudo?

scudo2

Dtp1979 wrote: »

How can the expansion pipe be too low? As in its tapped off the base of the tank or are ya on about the vent scudo?

Expansion is the vent pipe.
Pipe off the base of the tank is cold feed.

Both will allow for expansion.

To OP.
Expansion pipe is what we (down here) call the big pipe that loops over the top of the tank. If it's to low it can cause water to pump up it and adding air to the system when that water falls back into the tank.
Normal sign if that is corrosion on the end of the expansion pipe, otherwise called a vent pipe by posh plumbers !

Dtp1979

scudo2 wrote: »

Expansion is the vent pipe.
Pipe off the base of the tank is cold feed.

Both will allow for expansion.

To OP.
Expansion pipe is what we (down here) call the big pipe that loops over the top of the tank. If it's to low it can cause water to pump up it and adding air to the system when that water falls back into the tank.
Normal sign if that is corrosion on the end of the expansion pipe, otherwise called a vent pipe by posh plumbers !

Ah scudo ya may go back to the books. The "cold feed" is the expansion, full stop. The pipe that goes over the top is the open vent.

Cerco

If the water level in the expansion tank was too high would this cause air in the rads?
Just thinking if the ballcock in the tank was not set right then when expansion occurs water flows out through the drain.
What level should water be in expansion tank when cold?
When expansion occurs how much is level increased?

thehopper

Thanks guys.

Will get pictures and upload

Dtp1979

Cerco wrote: »

If the water level in the expansion tank was too high would this cause air in the rads?
Just thinking if the ballcock in the tank was not set right then when expansion occurs water flows out through the drain.
What level should water be in expansion tank when cold?
When expansion occurs how much is level increased?

Nearly sure it's 4 %

thehopper

Sorry for the delay

How can I post the photos?

I don't see any attach button

Wearb

thehopper wrote: »

Sorry for the delay

How can I post the photos?

I don't see any attach button

If u had 4 more posts you would see it. Maybe answer some of the questions above, one at a time and by then you will be able to post pics