The SumpBox™ from Liberty Pumps is a completely assembled sump pump system featuring debris filter technology. Designed specifically for new home construction, the SumpBox's large removable filter tray provides an innovative solution to pump jamming caused by stones and construction debris. Totally sealed and radon-ready, the SumpBox is available with 1/3 and 1/2 hp pumps. A clear disposable construction cover protects the system during masonry work and rough-in. Options include alarm and 12-volt battery back-up system. Liberty Pumps. Circle 2.