Cold water pump for elecric shower.

[Coldwell]

In my one-bed flat the mains water pressure at peak time falls to a low value and the electic shower cuts out. I have installed an 18 gallon tank and pump (I think it is 2 bar) to feed cold water to the electric shower and to an instantaneous electric water heater to feed the kitchen and basin taps (no bath). The tank includes a float switch to protect the pump. This all works fine. (Only small issue is that you have to lower the shower head to a couple of feet above the tray to get the pump to kick in but I can live with that.

The pump makes some noise which is not too objectionable but I would prefer not to use the pump unless required. Most of the time the mains water pressure is adequate and I would like to fit a valve of some sort to to connect the shower and water heater to run direct from the mains and bipass the tank/pump. The valve could be manually operated or automatic.

Suggestions for valve and plumbing arrangement would be appreciated.

Thank you

John

 

[SimonJohns]

Water regs will not allow you to pump directly off the mains. If you fit an expansion vessel after your pump. This will help over come the issue of lowering the shower head to activate the pump

 

[Coldwell]

Simon

Thanks.
Sorry my requirement was not clear. I want to feed the electric shower and water heater direct from the mains and not via a pump. When in use the pump is fed from the tank.
John