zimmer
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Hi plumbing type peeps, I'm want to change my three way valve on my heating system, (rads hot all the time with heating set to off) But unable to drain down system, which I have done before. I've opened the drain valve, but nowt comes out, also opened rad bleed valve and vent pipe at same time to let air in to system, get flow form both of these but nothing form drain valve. I assume the valve to be blocked - new valve required ? Or am I being a 'complete plank' and doing someting wrong. Cheers Zimmer ???
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