Product Description Designed for high rise apartment complexes the APT-331is small, compact, and is totally automatic. Compaction starts automatically when residents fill the chamber with waste often fed to the compactor thru a chute system. Your choice of container sizes from two cubic yards to eight cubic yards adapts this compactor to best suit your needs. Built to last for years and give you up to 3 to 1 compaction, this compactor comes standard with a hopper, mounted hydraulic power unit, photo eye start system and wired at the specific voltage you choose. Quality built, low maintenance and dependability are paramount…just what you have come to expect from SP Industries.