expansion tank height above cylinder

[stuartsjg]

Hi,
Im looking to fit a larger hot water cylinder in my flat which is all electric/economy 7.

Can i replace the hot water cylinder such that the take off at the top of the cylinder is just level with the expansion tank bottom rather than 2-3ft below it as it currently is now?

There are no power-showers etc coming off the tank, so i dont think there will be any issues with reduced flow rates to the 3 taps.

Any comments would be good

Thanks,
Stuart

ps. hope my graphics work!

 

[dextrous]

Do you mean the small expansion tank for central heating, or the large cold water tank?

 

[stuartsjg]

Its just an expansion tank as the cylinder acts as a thermal store with an inbuilt coil which is the heat exchanger which heats the mains pressure water going through it.

Current cylinder is 120L and i can fit a 210L cylinder in its place with the top of the cylinder just below the expansion tank.

As you can imagine, 120L of water at mains pressure through a shower doesn't last very long! Hence my need to upgrade to 210L.

I may have confused things by mentioning the taps... currently they do come from the thermal store volume, but i will change these to mains pressure coil (well 3Bar after reducer as i have a 12Bar inlet pressure!!).

Stuart