Filter and Softener Cartridge, Clive Coffee - Knockout

HCWS Filtration and Softening Replacement Cartridge

$56
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13 Reviews

Description

Replacement HCWS water filtration and softening cartridge for the home and commercial filtration systems. This cartridge is rated for 1,700 grains or roughly 1,000 gallons with a flow rate of 2 gallons per minute (GPM)—making it one of the longest-lasting, best-performing softening cartridges on the market. 

Compatibility: 

To learn more about water and how it might affect your morning routine, check out The Importance of Water and Your Machine on our blog. 

Product Variation Disclaimer: Please note that the manufacturers may source components from various suppliers. As a result, the part you receive may differ in color, material, or finish from the product image. These variations do not affect the fit, form, or function of the part unless explicitly stated in the product description.

Shipping & returns

In-stock items ship within 1-business day.

Free shipping on orders over $75. To be eligible for free shipping, the final order amount, after applying any discounts, including rewards points, must exceed $75.

Returns are accepted up to 30 days from the date the order was delivered. Smallware items must be unused. Open Box and Certified Pre-Owned are non-returnable.

The Clive Difference

At Clive, we're not just selling coffee equipment — we're your long-term partner in the craft. Every machine we carry is hand-selected by our team of espresso obsessives, backed by real-world testing and years of industry experience. We offer unbiased guidance, lifetime support, and a genuine love for helping you find the setup that's right for you. From your first question to your thousandth shot, we're here.

Reviews

R
Rich L.
I love the filter! it

I love the filter! it usually lasts about a year, sometimes a little longer and my water is extremely hard! I get a perfectly clean water that reads green suitable for my expensive espresso machine.

D
Dave B.
These are very easy to

These are very easy to remove and install. I’ve used a number of these for my ECM Synchronica. A counter I keep shows just over 5,000 shots pulled!

U
Umair A.
Shipment came in fast and

Shipment came in fast and the filter installation was so easy my kid can do it!

W
Walter V.
Very fast delivery, keeping my

Very fast delivery, keeping my espresso machine with nice soft water

R
Robert

These work great. Coffee tastes great and really no deposits build up after 2 years using them

D
David L.
These filter kits work great

These filter kits work great and are easy to install. I connected one over a year ago to the plumbing under my kitchen sink and recently installed this one in my vacation home under the house directly to PEX. The push connectors work really well, and they have never leaked. When I first tried to adjust the pressure knob on this latest install, the pressure and pressure gauge wasn't changing, but after running a bit of water through it and adjusting the knob back and forth, it eventually started working as expected.

M
Mark E.
Great option for softening existing filter system

This has been working great for us. First one lasted about 9 months using it for all our drinking and cooking water. Second one is tracking towards the same lifespan. It's a very convenient way to soften the water from our existing 3 stage carbon filter.

R
Richard L.
Still on the same filter

Still on the same filter after 15 months and it only starting to show less but still soft!

J
Justin F.
While the filter does exactly

While the filter does exactly what I need, there is a big delay in shipping from Clive.

S
Sam U.
Exactly what the doctor ordered.

Exactly what the doctor ordered. We have hard water in Houston and the filter was ready for a swap. First one performed very well so looking forward to another great job by the replacement.

J
John A.
It’s great

It’s great

M
Michael F.
Works great, very easy to

Works great, very easy to install

R
Robert H.
Worth it

This cartridge has kept my water in the sweet spot for my espresso machine. They last about a year for me with daily use. So glad Clive offers these!