Under floor heating (wet) increase pressure

[Diyisfun]

My under floor heating is showing a pressure of 0.25bar cold & goes up slightly when hot. (It all appears to be working ok)
The instructions say it should be at 1bar cold & rise to 2bar.
It doesn't say how to crease the pressure.
How do I increase the pressure.
Thanks

Untitled

• Diyisfun
• 6 Nov 2014
• 1

 

[stardanny]

What boiler have you got? There is a filling loop somewhere near or bottom of boiler or cylinder.

Filling loop is like a flexible braid hose with 2 valve with black knob.

Daniel.

 

[Diyisfun]

Daniel, will it be the BOILER filling loop? Would I have to open the motorized valve for the UFH?
I have a Greenstar Highflow 440

 

[Tipper]

Yes boiler filling loop.
No need to open any valves other than the filling loop valves.

 

[Diyisfun]

Thanks, I had email back from the ufh supplier, they said don't worry about the pressure as long as the boiler has the correct pressure.
I checked boiler it was low, so I have adjusted that.