• Can Water Filters really improve my water’s taste and quality?

    Yes. Our Water Filters have been independently certified to reduce specific toxic chemicals such as pesticides and herbicides. In addition, the filters contain patented filter media, which are superior at reducing selected contaminants, including heavy metals like lead and mercury. This reduction in contaminants results in improved water quality, taste and odor.

  • Why is Microban® product protection so important on our water filters?

    Microban® protection, present in the Pitcher and Faucet Mount filters, works continuously to help keep filter surfaces clean and provides protection that lasts the useful life of the product. The presence of Microban® technology in the filter components is not intended to purify drinking water, or prevent disease, but to fight the uncontrolled growth of bacteria on the filter itself, which could adversely affect the filter life and performance.

  • How do your Water Filters compare to other brands of water filters?

    Our Water Filters feature top-quality products, with improved technologies in antimicrobial product protection and contaminant reduction at affordable prices. Our proprietary ingredients reduce heavy metals without sacrificing the filtration capacity.

  • What are the 4 Phases of Protection and Protection that are featured in the Pitcher and Faucet Mount Filters?

    Phase 1: Proprietary ingredients reduce lead and mercury

    Phase 2: High-quality carbon reduces chemical corruption and improves taste

    Phase 3: Sediment reduction clarifies the water

    Phase 4: Patented antimicrobial technology protects the filter

  • How does filtered water compare to bottled water?

    Less Expensive: In a direct gallon-for-gallon price comparison, filtered water is a fraction of the cost of bottled water. Reduces Waste: Filtered water reduces waste; instead of disposing bottle after bottle, you only dispose the self-contained filter cartridge. For example, a 200-gallon Faucet Mount Water Filter Cartridge replaces more than 1200 20-oz water bottles; bottles that may otherwise end up in landfills. Using filtered water at home helps reduce the need for the 41 billion plastic bottles sold every year. Certified: Not all bottled water is the same. You don’t always know the source of bottled water, and you may not even know if it has been tested or certified. Our Water Filters have been independently tested and certified to reduce contaminants, and as a result, help to improve the taste and quality of your water – all within the convenience of your own home. Convenient: Unlike bottled water, our Water Filters allow you to conveniently enjoy quality, great-tasting water directly from your faucet or refrigerator

  • What does “Universal” mean?

    Universal is an industry term used to indicate that the filter cartridge will fit into other major brands of universal filter systems. Likewise, a universal system will accept most other major brands of universal 10-inch filter cartridges.

  • What are the benefits of a QuickTwistTM system?

    Our QuickTwistTM Water Filters are proprietary systems designed for easy cartridge replacement. Simply twist the cartridge ¼ turn to remove it for rapid, no-mess replacement. The self-contained cartridges have a built-in auto shut-off valve, so you can replace the cartridge without turning off the cold water line. Because of these special features, only DuPontTM QuickTwistTM Filter Cartridges will work in these systems. Please refer to the product instructions for complete installation details.

  • What is a “System Performance Rating”?

    The performance rating system helps to demonstrate the relative performance of each DuPontTM Water Filter System or replacement cartridge to each other. The higher the ratings number, the more types of compounds filtered from the water relative to other DuPontTM filters. Each replacement cartridge’s rating is based on the original product certification test. The performance rating system is not an actual product claim.

  • Which replacement cartridge should I use for my DuPontTM Water Filter?

    If you are confused about which filter fits your system, simply call 1-866-709-2086 so we answer your questions right away.

  • How do I know if my drinking water is safe?

    Consult your local water provider for actual water quality reports, or if you have a well, have your water tested by a qualified water-testing laboratory. For more information about a qualified laboratory in your area, contact your state health department, or call the EPA Safe Drinking Water Hotline (800-426-4791). You can also purchase home water analysis kits from home improvement, hardware and do-it-yourself stores. NOTE: DuPontTM Water Filters are not designed to purify water. Do not use DuPontTM Water Filters with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the water is filtered.

  • Is the replacement cartridge recyclable?

    The water filter cartridges are not recyclable. By using our Water Filters, you are reducing waste and making a more positive impact on the environment. For example, a 200-gallon Faucet Mount Water Filter Cartridge replaces more than 1,200 20-oz water bottles; bottles that may otherwise end up in landfills. Using filtered water at home helps reduce the need for the 41 billion plastic bottles sold every year.

  • When I install a faucet water filter, will the water flow at the same rate?

    Filtered water will flow at a noticeably slower rate than unfiltered water, because the filter media restricts the flow of the water. This restriction helps the filter trap unwanted contaminants. The slower flow rate allows the water more time to come in contact with the filter, thus optimizing the water treatment as the water flows through the carbon filter media and other contaminant-reducing additives. For this reason, it is suggested that consumers use filtered water for both drinking and cooking.

  • Are there any helpful tips for changing the cartridge in my Faucet Mount?

    The filter cover on the Deluxe Faucet Mount FM350 is located at the rear of the unit. NOTE: Do not attempt to unscrew the electronic filter meter cover on the front of the Deluxe Faucet Mount FM350 unit. The filter cover of the Premier Faucet Mount FM100 is located at the top of the unit. Unscrew the cover to remove it. Always support the bottom of the faucet mount when removing or inserting filter cartridges. This helps keep the seal with the faucet intact and prevents damage to the unit. See Step 4 in the instruction manual for complete details.

  • Will a shower water filter reduce the water pressure coming out of the showerhead?

    Our filtering showerheads have a flow rate of 2.5 gallons per minute (gpm). The industry standard flow rate for non-filtering showerheads is 2.5 gpm as well. The standards of the 1960s-1980s were not as restricted and showerheads from these times were completely open, allowing the flow rate to depend on the overall water pressure of the supply line to the house and the pipes supplying the showerhead. However, 2.5 gpm has been a standard for several years.

  • How long does it take to install a Whole House or Drinking Water Filter?

    Whole House Filters and Drinking Water Filters typically take about one hour to install. All hardware required for a typical installation is included with the filter system. Be sure to read the instruction manual before installing the system. The manual contains helpful hints and important safety precautions. NOTE: The hardware provided and tools suggested are designed for homes with standard metal or plastic plumbing. Additional materials and tools or a professional plumber may be required for homes with other forms of plumbing.

  • How long does it take to fill a filtered water pitcher?

    Our Pitcher Water Filters take approximately 5-8 minutes to fill. This time may vary depending upon how well the cartridge was soaked before installation, how old the filter cartridge is, and the temperature of the water.

  • What is the difference between Pre-Filters and Final Filters? Should I use both?

    Pre-Filters are designed to help increase the clarity of water used in your entire home. They reduce sediment such as rust and silt particles and extend the life of your household appliances that use or process water. They also prepare your water for Final Filtration and are effective at optimizing the life of your Final Filter. Final Filters are designed for point-of-use filtration at the sink, refrigerator or shower, for example. They work to improve the taste, odor and clarity of your water and can also reduce harmful contaminants. Your food and beverages will taste better when they are made with filtered water. These filters can also help protect small appliances that use filtered water. There are a number of reasons you may want to use both types of filters in your home. Using a combination of both types of filters will help optimize the filtration quality of your water. For example, if you would like to improve the taste and clarity of your drinking water with a Final Filter (point-of-use), a Pre-Filter installed on your incoming water line (point-of-entry) will reduce the incoming sediment and help extend the life of your Final Filter.

  • Do I need a “Heavy Duty” Whole House System?

    Heavy Duty Whole House Water Filter Systems are designed with a larger diameter for a higher flow rate. These types of systems still use a 10-inch filter cartridge, but the cartridge is nearly 4” in diameter. Heavy Duty Filter Systems are recommended if you would like a higher flow rate and/or if you have a large home with extensive plumbing.

  • Can I sign up for A/C FilterSmart® and have the filters shipped to another address?

    Yes you can. Multiple shipping addresses can be input and the billing address can be different.

Still have questions?


Water Filtration: 866-709-2086 
Shelf Liners: 828-449-1838
Stone Surfaces: 877-817-9874

Protect Plus

PO Box 9181

Hickory, NC 28603 – USA