by plumbbob »
Wed Jun 25, 2008 11:45 pm
A power or standard mixer shower requires a hot feed directly from the hot water cylinder and a cold feed directly from the cold header tank.
There are issues with feeds, heights and water levels that will effect the choice (or even if you can fit) a mixer shower. Choose a model and download the installation instructions from the net. They are almost all available. This will tell you how they will need to be plumbed.
You probably could upgrade the electric shower, but the feed cable is likely to need upgrading too.