OES1518 Features: * Water Filtration System * Increases clarity of your entire home"s water by reducing sediment, which extends the life of appliances that process water * Filters up to 15,000 gallons * Easy-glide by-pass valve lets replace cartridges without shutting off water * Clear casing to monitor life of whole-house water filter * Pressure relief valve Includes: * Includes universal 800 series carbon wrap-2 phase cartridge Construction: * Plastic construction Warranty: * Manufacturer provides 3 years limited warranty