DIYbanter - View Single Post - Shower pressure still low after adding shower pump

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wrote:
Hi

We have just installed a pump (1.5 bar, Varispeed 50) to increase the
pressure of our shower. However, although the pump does increase the
pressure, the change is quite small and the pressure in the shower is
still low. The plumber tells us that this is because our pipes are too
narrow to feed the pump at a high enough rate. Could this be the
explanation? Is there anything else we can try? The pump is positioned
less than 1m away from the shower, close to the hot water cylinder. The
cold water tank is in the attic.

What size are the pipes? The instructions with the pump are usually
quite helpfull about sizing and laying out the pipework so as to get
the best possible flow.

You did use an appropriate flange to connect to the hot water cyclinder
and use a new dedicated pipe from the cold tank with the outlet at the
correct height (below the existing one that feeds the hot cyclinder) so
that the hot water will always run out _before_ the cold water, rather
than just tapping into existing pipework, didn't you?

Andrew