Comprehensive Filtration: This 4-stage reverse osmosis system includes a sediment filter, coconut shell activated carbon filter, and high-efficiency membrane for thorough water purification. Nominal Filtration: The coconut shell carbon filter and sediment filter offer 5 micron nominal filtration to remove sediment, rust, and contaminants. High Capacity: The carbon filter boasts excellent chemical contaminant rejection and high dirt holding capacity for optimal performance. Compatible Replacement: These filter cartridges are compatible replacements for Pentair GRO-2550 50 GPD RO systems. Efficient Design: Constructed with 100% polypropylene for high dirt capacity and filtration efficiency in residential and commercial applications. Includes : 50 GPD encapsulated membrane (4002574), 5 Micron Sediment Filter, 5 Micron Carbon Block Filter, Inline GAC with built-in 3/8" Quick Connect Fittings This filter set includes: (1) 5 Micron coconut shell carbon block filter (1) 5 Micron polypropylene sediment filter (1) 50 GPD Reverse Osmosis encapsulated membrane (1) 10" Inline GAC filter with 3/8" Quick Connect CARBON BLOCK FILTER IPW Industries Inc carbon blocks are manufactured with a high purity Coconut Shell Activated Carbon. Our acid washed carbon blocks activate the carbon to make it more porous and able to remove more contaminants than standard water washed carbon. With a high chlorine reduction, great dirt-holding capacity, and greatly reduced carbon fines, you will soon make our Carbon Blocks your preferred choice! SEDIMENT FILTER Economical light weight filters for standard 10" housings. IPW Industries Inc sediment filter cartridge's coreless design is an economical solution to pre-filtration for many applications. These are used widely as pre-filtration for RO systems and whole house filtration for high sediment water sources. They are also used in applications such as Ice Machines, Film Processing, Beverage, Coffee, Analytical, Wineries, and many others. REVERSE OSMOSIS MEMBRANE The 4004424 GRO-50EN High Efficiency is an innovative next-generation RO Membrane using "Thin Layer Composite" technology (TLC) to provide enhanced water recovery in an encapsulated membrane. Where traditional RO membranes have a 3:1 ratio of 3 gallons of waste water to every gallon of purified water, the GRO-50EN new technology allows for a 1:1 ratio of 1 gallon of waste water to every gallon of purified water; making it more water and energy efficient. Less waste water down the drain for the same amount of purified water means saving you money and the environment with the same great results! The 4004424 GRO-50EN model RO membrane includes a drainline flow control, a premeate check valve, a 96% rejection rate, 1/4" quick connect fittings and is 2.5 inches wide by 15.14" inches long with a production rate of 50 gallons per day. INLINE GAC FILTER This inline coconut filter has 3/8" quick connections and is suitable for drinking water filtration applications. This filter has coconut shell Granular Activated Carbon (GAC) filter media to reduce unpleasant taste and odor from drinking water. It has a service life of 2,500 gallons (or one year) and a flow rate of 0.5 gallons per minute (gpm). This filter has a 2" outside diameter (OD) and an overall length of 10". It has an operating temperature of 35 to 100 degrees F, and a maximum pressure rating of 125 pounds per square inch (psi). This inline coconut filter is suitable for use in water filtration applications such as ice makers, water coolers, coffee makers, and refrigerators.