John Guest USA added 3/8-inch elbow and union fittings to its White CTS Twist and Lock offerings. Designed for easier installation and disconnection, the fittings have a tool-free push-fit installation. Fittings form a leak-proof connection with CPVC, PEX and copper-tube-sized piping, and are suitable for hot- and cold-water plumbing and hydronic heating applications. 973/808-5600; www.johnguest.com.