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  1. M

    15mm Pressured Rad Valve on open vented system

    Hi, Just noticed that I have purchased a pressurised radiator valve instead of a standard one. Whats the difference and when and when not should you use a pressurised one? Thanks, Steve
  2. M

    noisy start up - open vented system - air in pump, etc.

    Hi,newbie here. My problems have been ongoing for a while now. Not sure when they started, but have recently drained the system to refit a new radiator. Did that and refilled system. Bled all radiators periodically as air was getting trapped at the top of the upstairs rads. I continually get...
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