The Eveready Dell Valve is a compact unit equipped with a precision, balance float operated system. This time-tested backwater valve provides absolute protection from sewer water backup and does it AUTOMATICALLY. The Eveready Dell valve is fabricated with heavy gauge stainless steel for permanency for trouble-free service and positive closing. It has a specially designed backwater strainer to prevent solid matter from blocking the flood valve. It is fully warranteed. Eveready Flood Control. We stop basement flooding. The cost of the system can be repaid many times over by avoiding that one loss. Call for a free estimate 773 533-4800