Push-button trickle valve easily controls the flow of water or shuts it off to just a trickle, while lathering, for even greater water savings. Simply push the button one way to reduce the flow and push it back when you're ready to resume full spray - You can push the button all the way or anywhere in between to get that perfect spray. Large water passageways - virtually no pressure loss. Solid Metal Construction - The entire unit is made of brass, including the button. Quickly installs to most standard shower heads by simply using an adjustable wrench. PLEASE NOTE: to comply with US plumbing codes, the trickle valves will flow a minimal 0.05 GPM to prevent scalding when in the off position. Available in 6 beautiful finishes. High Sierra's easy push-button trickle valve is idea for those wanting to maximize their water and energy savings. Simply push the button one way to reduce the flow, and push it back when you're ready to resume full spray. You can push the button all the way, or anywhere inbetween to get that perfect spray. The entire trickle valve is made of metal, including the button. Please note: to comply with US plumbing codes, these will flow a minimal 0.05 gpm to prevent scalding when in the off position.