This report is the outcome of the ABCB’s Plumbing Code Development Research Project for rainwater harvesting and use. The reports follows on from the Consultation Document released in mid-2015, and makes five recommendations for a national approach to rainwater harvesting and use. The report’s key recommendations are to amend the PCA to cover rainwater systems and develop a new ABCB handbook. All five recommendations have been endorsed by the Board and the Plumbing Code Committee, with implementation expected to occur in NCC 2019.