20 x 4.5 Filtration Systems
A 20-inch whole house water filter is a central filtration system installed at the point where water enters your home. It provides clean, filtered water to every tap, protecting household appliances, plumbing, and fixtures from contaminants while improving water quality for daily use, cooking, bathing, and laundry throughout the entire house.
They are available in single, double, and triple cartridges, and the one to go for depends on your decontamination needs.
The triple filtration option is ideal for many households, businesses, and commercial institutions. They contain a sediment cartridge that sieves out particles and two carbon cartridges that effectively soak in toxins and hazardous chemicals, eliminating them from the contents you drink.
Types of whole house 20-inch water filters
The two main types of 20 inch whole house replacement water filters are designed to meet different household water treatment needs and system configurations. They vary in filtration technology, maintenance requirements, and effectiveness against specific contaminants, allowing homeowners to choose a solution that best matches their water quality, flow rate, and long-term usage demands
Cartridge filters
This type of 20 inch clear whole house water filter contains a cartridge that sieves out sediments and others that neutralize toxic chemicals, gases, and soluble metals. The latter is made from carbon, while the former is made from various materials, including polypropylene.
To ensure a continuous and stable flow of clean water throughout your home, regular cartridge replacement is essential. 20 whole house replacement water filters require timely maintenance to remain effective, as clogged or exhausted cartridges reduce filtration performance. Replacement frequency depends on incoming water quality, household water consumption, and the manufacturer’s recommended service intervals.
Backwashing filters
This type of 20 in big blue water filter contains a decontamination media inside a large tank that eliminates all pollutants as water runs through. After accumulating these impurities, the system will conduct a ‘backwash process’ where it lets water flow into the tank, rinses off the media and flushes out all contaminants.
This decontamination technology is preferred because you do not need to change any cartridges. You will eventually have to replace the system, but they last for many years.
Why do you need a 20-inch whole house filtration system?
The reasons you need a water filter for the whole house include:
- It eliminates unwanted substances: whether you want to get rid of chloramines, hydrogen sulphide, iron, bacteria, or dirt, a 20 inch water filter will get the job done.
- Enjoy better health: this filtration device protects you from pathogens and water-borne bacteria such as Escherichia Coli, Hepatitis A, Legionella Pneumophila, and Salmonella, which wreak havoc on your health when consumed.
- No more hard water: A 20" whole house filter successfully gets rid of lime and other minerals that are responsible for water hardness. With no limescale accumulating, you can enjoy the prolonged working life of your favourite household appliances.
- There is no need to buy packed water or numerous POU treatment solutions, whose costs can escalate really fast.
Explore a wide selection of high-quality replacement cartridges for your whole house water filter 20 inch systems available across the US. Browse the catalog to find the right option for your setup, or contact Filterway to get expert assistance and choose the best solution for long-term, reliable water filtration.
Certifications & Quality Standards
Many 20 inch whole house water filter systems and compatible replacement cartridges are designed to meet recognized industry quality and safety standards, including NSF/ANSI requirements. Depending on the filter media and application, certification helps confirm material safety, filtration efficiency, and consistent performance for long-term whole-house water treatment.
20 Inch Whole House Water Filters FAQ