Maintain the optimal water level in your pool, spa, or fountain with the Pentair T26 Water Drain Filler Valve Replacement Part. This valve is designed to use with Pentair automatic water drain fillers. Featuring a small wing nut, the replacement part can be easily adjusted to allow for help with floating. Set the float to a higher or lower maintained water level, depending on the shape and size of your pool, spa, or fountain. When installing the replacement part in your pool, the part connects to the incoming water supply near the top of the drain filler canister. The replacement part is not for use on automatic water leveler model T40F. Make sure the water levels in your pool, spa, or fountain are just right with the Pentair T26 Water Drain Filler Valve Replacement Part.