Great product!
"Great product!"





Order by 12 PM EST and this system will be on its way the very next day.
Free standard shipping on most products over $199.
Free shipping on most orders over $199 in the continental USA. $299 minimum for extended delivery states: AK, AL, AZ, CA, HI, ID, MD, ME, MN, MS, MT, NH, NV, OR, UT, VA, VT, WA, WV. Freight orders excluded. Speak to a water expert for more details.
Our Master Water Specialists and Certified Water Specialists review your water analysis and address your specific water problems. WE then design a system that we'll guarantee will solve your water problem(s) and back it with our One-Year Money Back Promise (Guarantee).
It all starts with a Laboratory Test of your water. Then, our Master Water Specialists and Certified Water Specialists will review the results of your water analysis and scientifically discuss the best way to treat your water, provide on estimate of how to do that, and then we provide you a One-Year Guarantee of Satisfaction. It's our Promise to You that our system will do what we say or we will give you your money back*


Fits Harmsco, Flowmatic, Ametek, Pentek, and most other standard 4.5" x 20" housings
Overall rating: 4.882353 / 5 from 68 reviews.
The US Water 4.5" x 20" Pleated Filter Cartridge is highly praised for its excellent filter performance, outstanding quality, and reasonable price. Customers also appreciate the fast and prompt shipping, along with the good customer service.
Review topics: [quality, customer service, service, filter, support, shipping, water, price, value, works, tasting, water heater].
"Great product!"
— Jaime E. (5/5)
"I’ve been very happy with the US Water 4. 5” x 20” Pleated Filter Cartridge (5 Micron). The build quality is solid and you can tell it’s well-made right out of the box. Installation was straightforward, and it fit perfectly in my whole-house system. Since installing it, I’ve noticed a clear improvement in water quality. Sediment is significantly reduced, and the water coming from the taps looks cleaner and tastes noticeably better. It’s also been great for protecting my water heater—there’s less buildup and everything seems to be running more efficiently. Overall, this filter does exactly what it’s supposed to do. It delivers consistent filtration, improves taste, and gives peace of mind knowing it’s a US-made product. I would definitely recommend it to anyone looking for a reliable, high-quality sediment filter for their home water system."
— Markus S. (5/5)
"2nd stage of a 3 filter system leaving well water tasting perfectly clean. Size is efficient to last a year with no appreciable drop in water pressure. Shipping is efficient and everything arrives well packed."
— Robert F. (5/5)
"Perfect fit quality filters. Have nice clean water now. Our only complaint is shipping time to the west coast takes too long. Customer service is very helpful and knowledgeable."
— Ricky G. (5/5)
"Great quality and value. Definitely recommend this product in this company. ."
— Michael C. (5/5)
"I love the quality and price! I will be a continuous customer!"
— Gerald C. (5/5)
"great water filter"
— Claire W. (5/5)
"US Filter support helped getting correct filters which increased water clarity."
— James G. (5/5)
"Perfect as a pre-filter for our whole home water treatment system. It keeps the manganese from gooing up our system. This is a picture of this filter after a year of using it with city water. The quality of the filter is very good and at a reasonable price."
— Timothy M. (5/5)
"This cartridge far surpasses what I was buying previously. It last a LONG time. The customer service was excellent to help me make the selection. Thank you!"
— Cheryl H. (5/5)
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