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Thanks for all your help. I now know how to sort it out, but at a cost! Every single TRV on the system was jammed shut and so old that when I was messing around with one the rubber valve on the plunger inside disentegrated and started leaking all over the floor... luckily I had a drain on the...

no, checked that first thanks all for help, off to drain down and refill... re: go easy on the gas I install solar hot water systems, so I help many people do exactly that!

Ok its beginning to look like a boring old airlock isn't it? Any killer hints on flushing out problematic airlocks? the system was quite reluctant to drain down... All 22mm pipe with 15mm tails to the rads, had to put my own drain cock in as there was none present. Its located just lower...

I moved cylinder from first floor to loft and re fitted associated pipework. I have an air release on high point of both circuits, and all radiators are showing water at bleed valves

could be that the shower valve / head is reducing flow significantly; I have had this problem... new shower? electric, mixer, pressure balance or thermostatic? shower head can make a difference, make sure its clean and has no flow restrictions, some have instructions saying minimum 2 bar

doesn't matter whether it s COMBI or other, somewhere in the house will be one rad (down stairs) with a drain cock on it. its usually near the front or back door. attach hose to spigot, undo square nut with a multi key / spanner and drain to outside of house. this will in theory release...

Hello Installed DanfossRandall Y plan contractor pack. The HW circuit works fine in all respects, but CH circuit doesn't. Someone put up this table on the forum recently: ORANGE BROWN/WHITE GREY OFF 0v 0v...