The Delta Dryden monitor pressure balance valve trim with volume control ensures excellent control for the shower in your bathroom. This valve trim allows you to adjust the volume of the water in the shower. It helps to regulate the pressure of hot and cold water when the valve is turned on or off. The clean lines and dramatic geometric forms of the Dryden bath collection are based on style cues from the Art Deco period. Getting ready in the morning is far from routine when you are surrounded by a bath that reflects your style.