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:lol: yes you have prompted me to investigate further. Aqualisa technical support line is great and they have just given me lots of info electric showers need 'working' 1 bar of pressure in the loft and produce flow rate of 4/5 litres water per minute ( ie pants) in winter, summer when water...

Also doing a loft conversion and planning on an electric shower with mains CW feed but no one has tested pressure or flow yet in the loft. A while ago when tested at kitchen tap it was 1.8 bar and 15l/ min Does it need to be tested at loft - eg where it comes into the cold water tank?

So 22m hot water pipe from h/w cylinder and 15mm cold mains pipe is ok on a mono block type tap :?: :idea: Are some taps better than others in delivering flow of water :?: Many thanks for feedback.

:? 15 to 22 mm - I am not sure what you mean? Will more water come through a 22mm pipe so bath will fill quicker? Is this where pressure comes in - eg if higher pressure then more comes through the narrower 15mm pipe but at lower pressures there is more difference in flow between a 15 and 22 mm...

Dumb question now :?: Is the pressure of the water coming out of the hot water tap the same as the amount of water coming out? For a bath hot water filler the issue is mainly how long it will take to fill which will be dependant on how many litres per minute flow is? And nothing to do...

Thanks for rapid response. Forum is working already - and after I posted had a thought - do venturi taps exist? Just did a google search and nothing obvious came up. But if there is reasonable cold mains then the same principle of the cold water pressure sucking through the hot should apply for...

Hi, We are doing a loft conversion and need to move the existing cold water tank which is on a raised platform in roof (about 70cm high). To keep the platform and move it closer to the eaves - we can only fit a 25 gallon tank in. OR we can have a 50 gallon but it will have to be at loft floor...