Avoid garbage disposals. Garbage grinders substantially increase the accumulation of solids in the septic tank, as well as the solids entering the leach fields and pits. Their disadvantages far outweigh the convenience they provide and are not recommended for households with their own sewage treatment systems. If used, the septic tank size should be increased or the discharge should run through a separate tank first called a trash tank. Once installed, it should discharge into the septic tank or a separate leaching system and not directly to the existing leaching system. If you use a garbage disposal, pump more frequently – or better yet, compost your kitchen scraps. Disposals lead to buildup of grease especially from meat and bones, and insoluble vegetable solids.