Loss of pressure

I have a Systemate III 83 & I noticed at the weekend that the pressure was at 1 bar I topped it up with the tap & found it had dropped back down to 1 bar with in 20mins, never done this before.

I did this when the heating was off (I don't think its mattered before) I was concerned if this meant there was a problem with the system? I have hot water & heating and no leak that I can see.

I am in a flat & the sysem is 12years old so a little concerned as I am top floor.

I was told to bleed the rads & check they are not leaking...any other thoughts? Only thing I did differently was I turned on a radiator which I have had turned off for several months.

Hello Worried,

I'm not sure I understand the problem. The system pressure is supposed to be 1.0 Bar when cold! Why are you topping it up?

Cheers, Mike

Worried wrote:I have a Systemate III 83 & I noticed at the weekend that the pressure was at 1 bar I topped it up with the tap & found it had dropped back down to 1 bar with in 20mins, never done this before.

I did this when the heating was off (I don't think its mattered before) I was concerned if this meant there was a problem with the system? I have hot water & heating and no leak that I can see.

I am in a flat & the sysem is 12years old so a little concerned as I am top floor.

I was told to bleed the rads & check they are not leaking...any other thoughts? Only thing I did differently was I turned on a radiator which I have had turned off for several months.

I was told to keep it between 1-2bar & it normally sits at 1.5 bar?
I have been told the overflow pipe is leaking too, this has only just started happening around the same time.

Not sure if the 2 are related or its something to do with the water tank in the loft but I assume all the water for this system comes of the mains not from a tank? Is this true?