The John Guest USA Speedfit Angle Stop Valve provides an extra line off of an existing stop, giving the user independent water flow control and the ability to upgrade or repair accessories without shutting off the main water supply. The valve utilizes push-fit technology — allowing quick connection without the need for tools — and is offered in white polypropylene with food-grade EPDM O-rings. The valve connects between the valve and riser to the main water supply line for applications in reverse osmosis, filtration systems, automatic coffee brewers and ice makers. The conversion adaptor can be threaded to either side of the valve to make configurations of 1/2-by-1/2-inch NPS or 3/8-by-3/8-inch compression. The valves are intended for use with potable water systems and are not to be used in heating systems or with compressed air, explosive gases, petroleum spirits and other fuels. 800-945-4872; www.johnguest.com.