The Watersource frostproof yard hydrant features a shutoff valve that operates below the frost line to supply running water, even in the coldest weather. Cast iron head can be secured with padlock. Bury Depth: 8, Plunger Type: Sturdy Buna-N Plunger with solid brass core-leakproof seal in all temperatures, Shutoff Valve: Operates below frost line, Hydrant Head: Cast Iron, Standpipe Size: 1in. Corrosion-Resistant, Valve Seats: Nylon, Connecting Rod: Brass Brass connecting rod provides smooth, easy, leakproof operation; will not rust or cut into packing Nylon valve seat provides perfect leakproof seal and can be easily replaced Rod, plunger, seat and linkage are replaceable without digging