JR Products 497-AD-26-A Polar White City/Gravity Water Hatch with Brass Check Valve Gravity spout accepts either 1-1/4" or 1-3/8" water fill hose Lead-free brass city check valve with 1/2" MPT Includes a tank vent connection UV and impact resistant, resists road salts and acids Cutout Dimensions: 3-3/4" H x 6" W; Outside Dimensions: 5-5/16" H x 7-9/16" W; Total Depth: 2-1/2"