No we haven't, we've got a 32 kW system boiler and (large) hot water cylinder.
And in any case the less-than-3-bar I mentioned is *static* pressure measured at the incoming main. Obviously it drops even further once there is any flow.
Richard.
meters of 15mm pipe is about 0.6bar.
So 3 bar is way good enough for flow if you haven't got a restriction in it.
Plenty of people are happy with a header tank in the loft and a shower on the ground floor. That's about 0.3 bar.
I expect you would be right if the incoming pressure remained at 3 bar when the shower is running, but of course it doesn't. For a start the static pressure is generally lower than that, then there's more than 50m of pipe from the company main to our house, then a lot more than 10m inside the house.
I didn't say we weren't happy with it, indeed the showers are a lot better than they were in our last (header-tank fed) house. The point I'm making is that a mains-pressure shower is not necessarily preferable to a pumped shower, which was your original claim.
Richard.
Thanks to all for the fascinating discussions.
I'd not seen these things before, Andy, so that's another thing.
Now to get more detail about exactly /what/ needs to be done for the (now three) options, so I can get some idea about numbers and avoid any teeth sucking incidents. Or, at least see through them.
yes, but if that is 15mm you eed to get it seen to.
then a lot more than 10m
I am not responsible for your inappropriate pipe runs :-)
I think it is in almost every case.
If you can maintain decent flowrates through your mains connected kitchen cold tap, the expense of a mains pressure tank is very predictable.
Generally around the £1000 mark installed.
You do like to make assumptions! It's getting on for 20m *in a straight line* from where the mains water enters the house to the most distant shower, and that's without diverting via the hot water cylinder. I can't see how the total pipe run can possibly be any less than about 30m, allowing for going around corners. It's not all 15mm though, I think from the incomer to the cylinder it's 22mm and from the cylinder to the showers
15mm.Richard.
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