Designed for use in the domestic plumbing market, the John Guest USA ProLock Fitting Range is available in 3/8- to 1-inch CTS sizes. Manufactured from high-quality engineered plastic with EPDM O-rings, the fittings can be used with any combination of copper, PEX or CPVC pipe; require no tools; and are UV-resistant for outdoor use. The push-to-connect fittings incorporate Twist-to-Lock technology, which provides users with extra security when the fitting’s cap is twisted a quarter turn into the locked position. Fittings also have an audible click with visible alignment arrows to assure plumbers with a leak-proof connection. Proven to reduce installation times by over 40 percent, they are code-approved and approved for behind-wall use. 973-808-5600; www.jgprolock.com.