75 Gallon W-Series Stock Tank is rotationally molded with high quality, FDA approved, UV protected, impact resistant Poly to ensure unifrom thickness and strength for unrivaled durability. All edges have been rounded for animal safety. The one piece construction eliminates cracking and splitting that's common in plastic-welded, two piece tanks. Float valve assembly consists of - Brass 3/4" Float Valve, 5" Float Ball, 10" Brass Rod, 3/4" PVC swivel adapter. Serrated arm allows for easy water level adjustments. The float valve assembly is neatly concealed underneath the black poly cover. The cover prevents animals from adusting or breaking the valve assembly. Bulk head drain plug kit is provided with this tank, part # BK-DR. If the Stock Tank gets a small leak due to unforseeen circumstances, such as a bullet hole, it can be braze welded with a common butane torch to fill the hole. Industry leading 5 year warranty that is backed 100% from the date of purchase.