Delta Tetra 14 Series Valve Only TrimFamiliar geometries and subtle curves in the Tetra Bath Collection combine to bring a sleek, architectural look and feel to the bath. Delta showers with Monitor pressure balance valves are engineered to make sure you don't experience a sudden and possibly unsafe change in water temperature as a result of running water elsewhere, such as using a dishwasher, flushing a toilet, or running a washing machine. You can install with confidence, knowing Delta