Built by Pentair, this Automatic Water Filler T40FDG Fluidmaster Valve System is a trusted pick for pool owners and service pros alike.

The Pentair T40FDG Automatic Water Filler with Fluidmaster valve system delivers dependable, hands‑free water level control for pools and spas. This rugged automatic filler constantly monitors and maintains your pool’s water level by refilling as needed, eliminating the hassle of manual top‑offs and helping protect your pool equipment from damage caused by low water levels.

Featuring a premium Fluidmaster valve mechanism, the T40FDG is engineered for smooth, drip‑free operation and built to last performance in both freshwater and saltwater environments. Its quality construction and precision control make it ideal for residential and commercial pool installations requiring consistent water level maintenance.

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