Pentair Autofill with Fluidmaster Valve, Dark Gray | T40FDG PresAir Manufacturer part number 744000390

Manufacturer part number 744000390

Proper traction helps the cleaner move across pool floors and walls

This part is replaced to restore proper filtration and pump performance

Designed for professional service use and in-ground pool protection

it helps minimize downtime during service

Pentair Autofill with Fluidmaster Valve, Dark Gray | T40FDG PresAir Manufacturer part number 744000390What This Part Is Used For The Pentair T40FG Autofill with Fluidmaster Valve Dark Gray maintains consistent pool water level. It automatically replaces evaporated water through a controlled valve system. Why This Part Matters Proper water level protects pumps from air lock and cavitation. An autofill minimizes manual maintenance and stabilizes system performance. It also helps maintain consistent waterline appearance. Key Features and Specifications