Water Filtration Systems

Find Replacement Filters and Systems

Types of Water Treatment Applications

Mother and Daughter Washing Dishes

There are a number of different types of water filtration systems and options. But water filtration systems basically come in two types: Point of Use (POU) and Point of Entry (POE).

Point of Use Systems (POU):

POU systems are generally installed at the kitchen or bathroom sink. These systems can have one, two or three-filter housings with each housing containing an individual filter with a system flow rate of approximately half to one gallon per minute. A point of use system can be installed on the countertop or under counter. Depending on the type of water treatment you've decided on, there are POU systems for Reverse Osmosis, Ultraviolet and general water filtration.

Point of Entry Systems (POE):

POE systems are installed where the main water line enters the home. A point of entry system is commonly referred to as a whole house system, since the filtration it offers treats water for the entire home. Like a point of use system, the point of entry system allows for one, two or three filter housing with a system flow rate of 5 to 20 gallons per minute.

Just as there are a wide range of water-related contaminants, there are a variety of water treatment methods available for point of entry applications, including Ultraviolet, Reverse Osmosis and general water filtration.


PuroTwist Undersink bracketUnder Sink

ESP Water Products’ under counter filtration systems are available in both single & two stage designs. The systems use the Omnipure Q series “quick twist” design with either a “valved” or “non-valved” head design. A wide variety of Omnipure Q series filters are available to address a large number of water contaminants. Under counter filtration systems require them to be plumbed to the main cold water supply.


QMP Dual State Countertop Water Filter System QMP 603Countertop

ESP Water Products’ countertop water filtration systems simply attach to your faucet and do not require that they be plumbed to the main cold water supply. The systems are available in either single stage or two stage configurations. There are a multitude of both standard and specialty cartridges that can be used to remove a long list of water related contaminants.


3 stage Big Blue Style Filtration systemWhole House

ESP Water Products’ whole house filtration systems are commonly referred to as “point of entry units.” The systems are installed at the point where the main water line enters the home or building.  The systems are offered in one, two, and three-stage units. The stages are available in 10 and 20-inch lengths, and either slim or wide body designs. There is a wide range of filters available for these whole house systems and are designed to remove many contaminants.


Year Supply RO ReplacementReplacement Filters

ESP Water Products offers replacement filters for generic as well as many proprietary filtration units. These filters are manufactured by the leading major U.S. filtration manufacturers such as Filter Specialty, Omnipure, Osmonics, Systematics, and more. The range of filters include those capable of addressing such concerns as sediment and turbidity, chlorine, nitrates, fluoride, arsenic, and more.


Pack of Colored tubingReplacement Parts

ESP Water Products offers replacement parts for the most common water filtration systems on the market. The replacement parts include such items as faucets, tubing, fittings, housings, wrenches, cold water line connectors, and more.


Search By Brand

ESP Water Products allows a search of water filtration systems to help you identify the correct filters and replacement fittings for your system. Filters and parts are available for such models as Hydrotech, Paragon Water, QMP, Omnipure, Doulton Ceramic, Rainsoft and Aqua City, and many more. Choose this link to find parts specific for your system by brand.