"Christian McArdle" wrote in message
t...
Like I say, this is based purely on my own "sort of" logic rather
than any fact, so shoot me down gently!

If the problem is that the street can only supply 11 litres per minute and
you want more, then you will need a tank. No amount of piping is going to
magically double your flow rate.

If your flow rate from the mains is only 11 litres per minute, then your
supply is not suitable for a combi anyway. The installer should have
checked
this and not installed such an unsuitable system.

Options:

a) If the supply in the street is OK, you may be able to upgrade your
supply
to something decent like 25mm MDPE which will give you much better flow.

b) You can install a large tank in the loft to run a shower. You will need
a
pump to pressurise the water as it leaves the tank. This pump can also
feed
other taps (i.e. the bath) or you can use an all in one power shower which
only feeds the shower.

If you go to the bother of installing a tank in the loft, then have the pump
supply the combi. Simple. A double feed pump that will have two tappings
off the tank and one leg supplies only the combi and the other the cold
water oulets, except the cold water tap at the kitchen.



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