Gerber Plumbing Fixtures' Treysta tub and shower valves are built for smooth and quick installation, the company notes. The valves have a common platform pressure balance cartilage for all configurations — a single cartridge that fits in all valve bodies. The open-and-close stops accommodate back-to-back installations, and vertical inlets allow for maximum flexibility in the wall, minimizing the need to reframe. Air and water pressure testing capability is boosted with the valve's unique test cap, Gerber adds.