For sale by owner, huge grease interceptor, and a smaller solids interceptor. These units are brand new, and both have extensions on them. The large one is called a grease interceptor, These are both Wade brand, with the cut sheets attached.. These were purchased for a project that was cancelled and they were not returnable. These are in like brand new condition. These units cost over $3000 for both units new. These can be seen in Concord N.H.