Can I mix mains pressure water with hot water from cylinder into thermostatic mixer bar?

Question

The pressure is c**p and enough cold won't come out, less than 1 metre head. If I were to connect mains to the cold water supply to the shower, would the shower work properly mixing with the gravity fed hot water, which does come through o.k? (pipe run is set up already straight from cold water tank - hot from cylinder to shower only). I realise a pump is the real answer but would the above work instead?

Answer 1

Yes.

What you need is a "venturi" type shower which does exactly what you want by gravity.

The Trevi is one of the better types of venturi shower.

Answer 2

Your best bet would be to buy an electric shower that heats

its own water and is fed from the cold supply instead of

fafing around trying to mix hot and cold .

If you are trying to do this with a power shower then you will

have limited time under the shower because it will drain

the DHWC quite quickly.

Answer 3

Yes of course  a mixer needs both hot and cold water.

Answer 4

it depends on

the pressures of the hot and cold, need to measure it, needs a specialist gauge (plumber)

the showers capability to deal with different water pressures ie between hot and cold, look up the manual for your shower and compare to the pressure readings

if the cold is too high a pressure the hot won't come through