Swimming Pool Auto Fill Valve and Protective Cover- EZAutoFill - The Water Wise Solution! The ORIGINAL EZAutoFill swimming pool auto fill is the auto fill that uses your existing water fill line to regulate your pool or spa water level EZAutoFill is an easy, inexpensive way to constantly monitor your swimming pool or spa water level BE WATER WISE! No more guessing. EZAUTOFILL KNOWS EXACTLY HOW MUCH WATER IS NEEDED!! Leave your home for extended periods of time without worrying about filling your pool water THE VALVE DOES NOT SCREW INTO YOUR FILL LINE. MODERATE INSTALLATION IS REQUIRED.BEFORE YOU ORDER, SEE OUR INSTALLATION VIDEO AT WWW.EZAUTOFILL.COM