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Yes, working normally that was what I was getting from the discussion. Thanks for helping me out, I feel reassured now.

Ah, then the confusion was caused by me not defining what 'on constantly' means. By 'on constantly' I mean the burner being lit. I take it that in heating engineer terms 'on constantly' means that the boiler being told to run by the thermostat system The cycle time of 20/30 minutes gets...

So the 2 answers above contradict each other? Or am I misinterpreting?

Given that the thermostat shows that the heating has not reached its target temperature should the boiler remain on constantly? Mine goes on/off over a, roughly, 20/30 minute cycle. I have a conventional system of : Gas boiler Cold tank Expansion tank Cylinder Not pressurized.

I didn't know that. Bother! I may have to fit a pump. Or buy a new older style tap

Hi Seco, I've replaced the pipe work with 22mm and the flow has gone up considerably. It is still not quite as it was. I used to have a mixer tap with 2 valves and 2 handles. When I turned them both on the subsequent water flow was all of the cold water flow plus all of the hot water flow...

Cool. I'll let you know how I get on.

I've found the formula for water resistance here and going from 22mm to 15mm reduces the water flow to a fifth of the original!! I'll make the changes

So the reduction in size will lower the pressure? So all I need to do is make sure the pipe work is 22mm all the way?

Hi there, Since I had some work done I've lost pressure in my shower. I have a downstairs bathroom and ran a shower off of a mixer tap. Being on the ground floor I had good cold water pressure from the tank in the loft. Mixing in the hot from the hot water tank (also on the ground floor) I...