Grow1 float valve will allow you to control the water level of your tank or reservoir with no maintenance. They can be mounted vertically or horizontally. Each one comes with a mounting nut and rubber seal and are individually packaged for the retail shelf! Available with a 2″, barbed fitting, 4″, quick connect, or 3/8″, quick connect fitting. The unique thing about these is the quick connect fittings do not thread on. Meaning you can remove them and use any type of fitting, such as a ?T?, elbow, or reducer!