1 / 7PUREPLUS CTO20BB-KDF 5 Micron Whole-House Carbon and KDF Filter
Micron: PUREPLUS CTO20BB-KDF is a replacement whole-house cartridge using activated carbon and KDF. The listing claims reduction of heavy metals, chlorine, taste, odour and other impurities, but does not provide independent performance verification. Confirm its fit with your filter housing before ordering.
At a glance
- The listing describes a coconut-shell activated carbon and KDF blend for whole-house filtration.
- The manufacturer claims reduction of heavy metals, chlorine, unpleasant tastes, odours and other common impurities.
- New cartridges should be flushed for 5 minutes before use, according to the listing.
- The listed replacement interval is 6–12 months, or sooner if taste changes or water flow reduces significantly.
Often bought together
Pros and cons
Pros
- Combines activated carbon and KDF media in one replacement cartridge.
- The manufacturer describes uses beyond heavy-metal reduction, including chlorine, taste and odour reduction.
Technical specifications
5 specifications| Brand | PUREPLUS |
|---|---|
| Model | CTO20BB-KDF |
| Dimensions listed | 11.4D x 11.4W x 52H centimetres |
|---|---|
| Weight listed | 2.81 kg |
| Material listed | Activated Carbon, KDF |
|---|
What to know before buying
- The heavy-metal and other contaminant-reduction statements are manufacturer claims, not independently verified performance results. Confirm cartridge fit for your housing. Shut off the water supply before replacement, flush a new cartridge for 5 minutes, and follow the listed replacement guidance of 6–12 months or earlier if taste changes or flow drops significantly.
Who is it for?
A good fit for
- Owners of a compatible whole-house filter housing seeking a carbon-and-KDF replacement cartridge.
- Buyers prioritising the listed claims for heavy-metal, chlorine, taste and odour reduction.
Less suited to
- People needing independently documented contaminant-reduction performance or a verified fit for a specific housing model.

Customer reviews on Amazon
- 5 stars
73% 73% - 4 stars
15% 15% - 3 stars
0% 0% - 2 stars
5% 5% - 1 star
7% 7%
Only aggregate ratings are provided, with no written customer feedback to explain the reasons behind them. The overall rating distribution leans favourable but includes some low ratings, so it cannot establish how well this cartridge performs for a particular water supply or housing. Buyers should weigh that uncertainty against their need for documented filtration results and a confirmed fit.
Frequently asked questions
What media does the cartridge use?
The listing specifies activated carbon and KDF and describes the carbon as coconut-shell based.
How should a new cartridge be prepared?
The listing says to flush a new filter for 5 minutes before use.
When does the listing recommend replacement?
It recommends replacement every 6–12 months, or when water taste changes or water flow reduces significantly.
Should the water supply be shut off during replacement?
Yes. The listing instructs users to shut off the water supply before changing the filter.

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