Jones Stephens B04403 Extension Kit with Cast Iron Lid for 4" Backwater ValveJones Stephens B04403 Jones Stephens backwater valve extension kits make accessing a buried valve simple. They include lids made with heavy duty cast iron, with SEWER cast into the top for both an aesthetically pleasing and practical item. They are thick walled to provide superior longevity. The kits also include a 16 sleeve and adapter. Kit includes: 16" sleeve, heavy duty cast iron lid and adapter "SEWER" is cast into the top of lid Thick walled for