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Water Softener Resin Media Replacement, 1/4 Cu Ft Cation Resin, 8,000 Grain

Based on 721 reviews
Condition: New
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$45.00
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Availability: In Stock.
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Arrives Wednesday, Oct 28
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At a glance

Condition
New
Style
8000 grains
Model
MED-CAT-025
Dimensions
12 x 12 x 6 in
Weight
11.9 lb
Color
Brown
Material
Softener Resin

Features 8

  • Universal Compatibility Designed for hassle-free resin replacement in residential, commercial, portable, and RV water softener systems. This 1/4 cubic foot cation resin media can be used on its own or combined with additional resin as needed, making it a flexible choice for restoring softening performance across a wide range of water softener tanks.
  • Efficient Water Softening Made with 100% ion exchange premium resin, the MED-CAT-025 is designed to soften hard water by exchanging calcium and magnesium hardness ions. This helps restore your water softeners ability to reduce hardness, improve water feel, and support better performance from plumbing, fixtures, appliances, laundry, and cleaning products.
  • NSF/ANSI 44 Certified Quality NSF/ANSI 44 certified for added confidence in quality, safety, and performance. This premium cation resin media is made to meet strict water softening standards, giving you confidence that the resin you receive is clean, dependable, and built for long-lasting ion exchange performance.
  • Helps Reduce Hard Water Problems Helps reduce hardness minerals that can contribute to scale buildup, soap scum, spotting, poor lather, and mineral deposits on fixtures and appliances. Softer water can help improve everyday washing, bathing, laundry, dishwashing, cleaning, and overall water use throughout the home, RV, or business.

Description

From sediment to chlorine and odor, we carry a full line of industry-leading filtration systems to cover your entire home. iFilters is the leading water filtration marketplace on the planet. Browse a collection of thousands of parts, accessories, and systems that meet your water filtration needs. Why iFIlters? With a broad catalog of water filtration products and US-based customer support, we can assist with any question and project you may have. Thousands of customers have made iFilters their #1 Choice for their water filtration needs, now it’s your turn. WHAT IS THE DIFFERENCE BETWEEN 8%, 10% AND FINE-MESH RESIN? Choose 8% resin for dependable everyday softening, 10% resin for added durability in demanding or chlorinated water, and fine-mesh resin for better water softening in well / iron heavy homes. WHICH RESIN IS BEST FOR MOST RESIDENTIAL WATER SOFTENERS? 8% cross-linked resin is a the industry standard proven choice for everyday residential softening. It provides a dependable balance of ion-exchange performance, bead strength and regeneration efficiency. WHEN SHOULD I CONSIDER 10% CROSS-LINKED RESIN? A 10% cross-link resin is ideal for chlorinated city water, offering greater durability that may extend media life, allow longer intervals between regenerations, reduce salt use, and deliver long-term savings. DOES 10% RESIN PRODUCE SOFTER WATER THAN 8% RESIN? Not automatically. Softening performance also depends on system size, resin volume, water hardness, flow rate, salt dosage and regeneration settings. Both 8% & 10% resin can provide effective hardness reduction when properly selected and configured. Why should I avoid resin with less than 8% cross-linking? Lower cross-link resin has a weaker bead structure that may break down faster, especially in chlorinated city water, resulting in reduced performance and more frequent replacement. Our iFilters resin delivers greater durability and is NSF certified. Water Softener Resin Water Softener Resin Water Softener Resin Water Softener Resin

Specs 9

Manufacturer iFilters
Part Number MED-CAT-025
Item Weight 11.9 pounds
Product Dimensions 12 x 12 x 6 inches
Item model number MED-CAT-025
Color Brown
Style 8000 grains
Material Softener Resin

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Very good product
Style: 16000 grains
The product works excellently in extra hard water with sediment. It makes water taste good and very soft
Reviewed in the United States on July 9, 2026 by shaun moore

So far, works well as advertised.
Style: 16000 grains
I replaced the old media with this last week. Emptying the old media, flushing the tank and refilling was a job I hope to never have to do again, but after regeneration and running about 250-300 gallons through it, the water tests very soft.
Reviewed in the United States on July 7, 2026 by Amazon Customer

Like new perfect
Style: 16000 grains
Great product individual bags were very helpful
Reviewed in the United States on June 27, 2026 by Charles

WATER SOFTENERS DO NOT DECREASE TOTAL DISSOLVED SOLIDS (TDS)!!!
Style: 16000 grains
This resin does exactly what it's supposed to do - it exchanges sodium ions for calcium and magnesium ions. This is the basis by which water softeners work! As the negatively charged resin grabs positively charged ions (cations) like calcium and magnesium, it releases (or exchanges) positively charged sodium ions. When the resin can hold no more calcium and magnesium, it's time to recharge with a very high concentration of salt solution (brine). This knocks off the calcium and magnesium ions that then get flushed away and are replaced by the sodium ions, and the process starts again. So yes, TDS can remain the same or even INCREASE during this exchange process and this resin worked wonderfully to bring my 16,000 grain portable softener back to life. ... show more
Reviewed in the United States on May 1, 2025 by K. Wilson

Did the job
Style: 8000 grains
working fine so far in my softener. Came fast
Reviewed in the United States on October 5, 2026 by stomper

Perfect for Big blue filter housings
Style: 8000 grains
The softener cartridge for big blue housings is ridiculously expensive for what it does. You can buy and empty cartridge housing and fill it with this for a fraction of the cost.
Reviewed in the United States on March 22, 2026 by DG

Performance is worse than the 13 year old resin I replaced
Style: 8000 grains
This resin is garbage!! I purchased a total of 1.5 cuft for my 10x54 softener. I was getting breakthrough after 800 gallons using previous 13 year old resin. It was only 1.0 cuft. My hardness is 18gpg and I backwash at 8# salt/cuft. of resin. An 8# / cuft salt regeneration on a competitor chart showed 36,000 grains capacity for 1.5 cuft. I used that versus the 48,000 grains listed in this product's literature. With 18 gpg hardness that would provide about 2000 gallons before breakthrough I only had half of that. The 1000 gallons with 1.5 cuft of new resin is worse than the 800 gallon breakthrough in 1 cuft of the old resin. This resin is garbage and it resulted in dosing a brand new $500 RO membrane with hard water. A one star rating is too high for this product. The flow rate through the resin was a consistent 1.6 gpm. That is the feed rate for the RO system. Replacement name brand resin is on order to replace this 2 day old garbage. ... show more
Reviewed in the United States on March 20, 2023 by Jim M

Ok
Style: 16000 grains
Ok
Reviewed in the United States on May 29, 2026 by Ed J Debczak sr
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