Water Tank Filler with Shutoff Valve - Quickly and Efficiently Helps Fill Your Water Tank and Eliminate Line Backflow - Features a 5/8" TubeFill the water tank in a fraction of the usual time. Quarter-turn pressure-sealed valve helps to selectively control the water flow. Large 1 x 1 x 1 inches fill tube helps to fill the water tank at or near full pressure while minimizing line backflow. 1 x 1 x 1 inches fill tube. Dimensions: 1 x 1 x 1 inches.