Pre-Assembled Simplex Grinder Packages is simply slide pump assembly down guide rail system, to connect plumbing and electrical service & system. It effectively macerates typical domestic sewage solids into fine slurry. It includes pre-assembled cast iron discharge elbow, discharge flanges, steel spacer, stainless Steel upper guide rail bracket and lift chain. It allows for simple electrical connections, easy service access and protection of connections. It includes bronze gate valve and ball check valve. It is specifically designed for use in residential or light commercial sewer applications with long discharge or high static heads.