Review on KES K1140B-CH: High-Quality G1/2 Brass Shower Head Shut Off Valve for Precise Water Flow Control - Chrome Finish by Harry Katab

Easily attaches between your existing shower rail and head (assuming your pipe size and threads are typical/standard) and will definitely help save water. More than just a switch, it can also be used to proportionally reduce water flow, allowing you to open it fully for a jet flush, or partially close it for less pressure/flow, or fully close it to stop water flow entirely. The control knob moves smoothly and proportionally reduces water flow, but leaks a bit (just drips/spills) so you wouldn't want to use it as a replacement for regular on/off valves. However, since it's only meant to be used for showering, a small amount of dripping isn't a big deal. Some important notes about possible changes in water temperature when using this device. The temperature and volume of hot water can be affected if the water flow is greatly reduced or shut off for a long period of time, as reduced water flow can cause pipes to cool down or the ratio of hot and cold water flowing through the pipes can change , which affects performance. Temperature. Users with on-demand (tankless) water heaters may experience even more variability, as sensors in the heater must adjust heat to changes in water flow and may not heat the water at all if flow drops below a certain level. level, resulting in slow cooling or even a sudden release of cold water when the pressure is re-pressurized. Best practice for instantaneous water heater users is either on or off; The path part probably won't work for you and you'll probably have to experiment to see what works.