This 440 deluxe series is a 4,400 gallons per day whole house reverse osmosis system and is built on a powder coated steel frame. It is great for use in multiple applications as a boiler feed, humidifiers, greenhouses, process water, electronics and spot-free car wash. This high quality whole house system comes standard with a pre-filter pressure gauge, multistage centrifugal pump, low-pressure protection with microprocessor auto reset, tank level input, liquid filled pump pressure gauge, stainless steel pressure vessels, product and reject flow meters, feed water and product water total dissolved solids monitor.