With ref to the previous (very prompt answers)
It's a pumped system! Can I still bleed as per answer 3 or is there another way? there is a drain off near the boiler, and its around this area that I seem to hear trapped air making the water "gurgle" Can I somehow force water into this drain cock with the hope of pushing the air around, and out of the system??

Dave, March 2008

Yes you could try hose from outside tap to drain off.But be carefull not to over do it as it will push water up and through the expansion pipe into your F&E tank Thats the plastic Fill & Expansion tank in your loft or where ever it may be. And the tank will overflow, thats ok, but when it does turn the tap off.

Pete, March 2008