The Apollo® check valve is equipped with 2-in. copper tubing at both ends to allow installation in seconds using the Viega no-solder ProPress™ crimping system. Designated the 61-600-A0 Series, the valve is available in sizes ranging from 1/2 to 2 in. and features a spring-loaded check for faster seating action. With its bubble-tight shutoff, the valves are suited for gas applications.