Changing a shower head to a WELS rated efficient shower head is a relatively simple and cheap step to take but the results can make a giant impact on your bills and the environment. 49% of all household water is used in the bathroom so making yours as energy efficient as possible is worth doing and not just for the savings you’ll make in the long term. Government rebates may also be available to assist with any costs, so check in your area for any information.
The shower head you use dictates how much water you use. Just because a shower head is 'water efficient', it doesn't mean it's weak.
In most plumbing setups, it takes a while for hot water to reach the hot tap when it's turned on. Cold water diverters recycle the cold water which would otherwise pour down the drain in this time.