Leak may we'll be in the boiler as some folk have a habit of switching the power off. SP stands for standing pilot. E version does not suffer from depowering
I changed a radiator on my heating system, and without doing anything to fix the leak on my boiler I filled up the system to 1.5 bar cold to check for leaks on the new radiator valves, that was 24 hours ago and the pressure is still at 1.5 bar... I'm confused now now last week the pressure dropped rapidly, not this week without doing anything it's not losing any pressure... does anyone have any ideas? There was no water leaking from the old radiator valves so it's can't be that affecting it.
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