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John Guest’s JG ProLock range of twist-to-lock fittings features an audible click and visible alignment arrows to assure plumbers have a leak-proof connection. Fittings are rated at 100 psi and 180° F. Manufactured from high-quality engineered plastic with EPDM O-Rings, the range is offered in 3/8” to 1” CTS sizes for traditional plumbing and commercial applications. They can be used with any combination of copper, PEX or CPVC pipe, require no tools and are UV-resistant for outdoor use. The fittings are also code-approved, approved for behind-the-wall use and come with a 25-year warranty.