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Just run some sentinel X300 through my system after having new radiators. When I drain it off do I need to drain the hot water cylinder side too or will that side just dilute as the system refills before adding X100 Thanks

In another post I was told to isolate the boiler and do a full flow flush. I have the pipes where a rad once hung, will these be OK for the flush if I swap the caps for valves? Would this be OK to just screw hozelock fittings on and attach hosepipes then. To isolate the boiler I...

My system drain point is on the return tail of the first radiator after the pump. Would it be better for flushing if it was further along the system?

Bleeding my rads the other day after drain and flush and there is a sheered bleed screw on the front panel of a double, the type with bleeds on the back not the side. This was done before I bought the house, (really - not a my mate is actually me, myself and I story) but it's now my problem to...