Abstract: Provided herein is a water saving apparatus configured for purging water from a hot water supply line into a cold water supply line comprising a hot water cavity connected to said hot water supply line for allowing flow of water from said hot water supply line to said first cavity; a cold water cavity connected to said cold water supply line for allowing flow of water from said cold water supply line to said cold cavity and from said hot water cavity to said cold water supply line; a valve configured to block the flow of water between said hot water cavity and said cold water cavity in a first position thereof and to allow the flow of water from said hot water cavity through said cold water cavity and to said cold water supply line in a second position thereof for purging water from said hot water supply line.