I have just installed a shower and the cold water was being fed from the mains and overpowering the hot water which is on a gravity feed. So I have taken the cold feed from the storage tank, which I thought would even out the pressure. But now all I have is hot water! Please give me advice asap. Cheers.
some of these showers require a minimum inlet pressure before they will operate correctly. Check the instalation instructions for the minimum hight of the storage tank above the shower head.
You may need a booster pump. I did.