http://www.watercorporation.com.au/S/showerhead_swap.cfmFree Showerheads (via swaps) for Perth Residential CustomersShowerhead Swap is a new water-saving program from the Water Corporation. Residential customers in the Perth metropolitan area can exchange up to two old water-guzzling showerheads for highly efficient replacements absolutely free
edited: Our Showerhead Swap program ended on 30 April 2013 in the Perth metro area. Over 124,000 showerheads were swapped – enough to save more than 387 Olympic swimming pools of water each year!