The Pool Sentry Water Leveler is an automatic water level maintenance product. Using this Leveler will allow pool owners the ability to keep a constant level of water without having to constantly monitor the water while refilling. Using a heavy-duty, reinforced hose for a directly supply, the water will stay on at all times when the unit is in the pool, and will automatically add water when necessary. There is a float built into the part that dips into the pool, and the water turns on automatically until it returns to the full position set by the pool owner, which it then turns itself back off when the desired level is reached.