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Ion-exchange Resin Replacement Cartridge — 20″ × 4.5″
HFS-FRS-2045
Help keep hard-water scale in check.
Refresh the resin stage in your compatible housing. Ion-exchange media targets dissolved hardness minerals, including calcium, to help reduce new scale build-up.
It treats hardness minerals before they contribute to scale on taps, shower fittings and kettles. Existing deposits still need cleaning.
$159.00
Taxes included.
Free shipping over $100
Changing all three stages at once?
The Standard 20″ × 4.5″ Replacement Filter Pack has this cartridge plus two more stages.
$304.99$323.00
View pack
Changing all three stages at once?
The Platinum 20″ × 4.5″ Replacement Filter Pack has this cartridge plus two more stages.
$359.99$393.99
View pack
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Measure these two.
Measure the cartridge you're replacing, not its housing.
A
Overall length — end to end, including caps or connectors
B
Outer diameter — at the widest point of the body
Will it fit?
Match the 20″ × 4.5″ format.
Compare your current cartridge’s overall length, widest diameter and end seals. 20″ × 4.5″ is a nominal format, so check the cartridge itself before ordering.
20″ × 4.5″
508 mm × 114.3 mm
← this replacement cartridge
10″ × 4.5″
254 mm × 114.3 mm
10″ × 2.5″
254 mm × 63.5 mm
Quick-fit twist-off
300 mm × 65 mm
Inline, hose fittings
260 mm × 50 mm
Measured it and still not sure?
Send a photo of the cartridge beside a tape measure and we'll tell you which size it is.
Call 0474 189 347 or email sales@homefiltrationsystems.com.
Nominal sizes vary a little between makers, so match the measurement rather than the label. What we can't tell you is how ours compares to a cartridge we didn't make and haven't tested, or whether a replacement affects your housing's own warranty; that one is between you and its manufacturer.
Fitting it, and what comes out
Cartridge installation and replacement guide
Follow the instructions for your existing system.
Need help with the change? Call 0474 189 347.
What happens, in order
- Isolate & release pressureShut off or bypass the supply. Release pressure.
- Replace the cartridgeFit the matched cartridge. Check and lubricate seals as directed.
- Flush & checkRestore slowly. Flush as directed and check for leaks.
- Record the changeRecord the date. Check cartridge condition and flow regularly.
Reviews
What people who fitted it said.
Only buyers we can match to an order can leave one, so the count is lower than it would be otherwise.