Am I right in saying that with a combination boiler with no header tank, with direct connection to the mains water, that is is inappropriate to use a booster pump?
I am planning to redo the bathroom, to include a separate shower unit. I was planning to use a thermostatic controlled shower unit to blend hot and cold feeds.
Presently we have a shower over the bath, with a combined tap/shower without any temperature regulation. This is very hard to adjust and both the hot and cold flows seem to be quite restricted. However, the old tap/shower unit may well have got a bit of scale or gunge, but I was expecting more vigorous flow, and suspected that the low pressure might be detrimental with a new shower too.
I just did a pressure test, and have 32 psi dead ended pressure. This was on the ground floor, so 3 metres higher (bathroom upstairs) it will be ~5 psi lower.
That seems a bit lower than I expected, but I have no real data to compare it with.
Checking the installation instructions from a shower plucked at random from 'tinterweb, it seems that it would be ok with pressures of 1 bar, or even lower if the flow restrictors are removed.
Am I worrying needlessly? Am I missing something? Does anyone have any advice for me please?
Cheers Alan