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The only set here that publishes two lifetimes and a swap schedule

Membrane Solutions C3 bottle cartridge set, one UF element and two ACF elements

A year of cartridges for one named bottle, publishing a pore rating, two separate capacities and the interval at which each element is meant to be changed.

Membrane Solutions C3 replacement filter set with one UF cartridge and two activated carbon cartridges

Membrane Solutions C3 bottle cartridge set, one UF element and two ACF elements

A year of cartridges for one named bottle, publishing a pore rating, two separate capacities and the interval at which each element is meant to be changed.

Compatible housings
The maker's own C3 filter bottle — stated in the title and in the first bullet
Thread standard
Not published on the listing
Stated pore rating
0.1 micron — stated as the filtration accuracy of the combined ACF and UF filter
Rated capacity
Up to 500 litres on the ACF element and 4000 litres on the UF element — stated separately, with a recommended change after one year for the UF and after four to six months for the ACF
Stated flow rate
Not published on the listing
Backflush method
Not published on the listing — the maker publishes replacement intervals in place of a cleaning routine
Amazon reference
B0F6LKYPMS (same reference on 6 Amazon marketplaces)
EAN
0850071881370
  • Publishes two capacities separately, one per element, instead of one figure for the whole pack — the highest rated capacity of the seven cartridges here at 4000 litres on the UF element
  • States the change interval in months as well as in litres, which is the pair that actually schedules a swap
  • No thread standard, so it is bought by bottle name only

Best for: Keeping a C3 bottle running for a year in one order, with the change intervals already worked out.

≈ $22 / £23 / 23 €
Check price on Amazon

Specifications

Compatible housings
The maker's own C3 filter bottle — stated in the title and in the first bullet
Thread standard
Not published on the listing
Stated pore rating
0.1 micron — stated as the filtration accuracy of the combined ACF and UF filter
Rated capacity
Up to 500 litres on the ACF element and 4000 litres on the UF element — stated separately, with a recommended change after one year for the UF and after four to six months for the ACF
Stated flow rate
Not published on the listing
Backflush method
Not published on the listing — the maker publishes replacement intervals in place of a cleaning routine
Amazon reference
B0F6LKYPMS (same reference on 6 Amazon marketplaces)
EAN
0850071881370

What this listing puts on record

A cartridge set for the maker’s C3 filter bottle, containing one ultrafiltration element and two activated carbon fibre elements. A filtration accuracy of 0.1 micron for the ACF and UF combination. A stated life of up to 500 litres for the ACF element and 4000 litres for the UF element, with recommended changes after four to six months and after a year respectively. BPA-free materials throughout. SGS testing to NSF/ANSI 42, 53 and P231, with a report number given.

Two clocks, and the listing publishes both

500 litres and 4000 litres. Every other cartridge on this shelf that publishes a capacity publishes one number. This one publishes two, because the pack holds two kinds of element, and it adds the months alongside the litres.

That is the most useful thing on the listing. A litre count tells you what a cartridge is worth; a month count tells you when to act on it, and carbon in particular is changed on time rather than on volume.

The pack is sized to a year

One UF element and two ACF elements, which the maker sets against its own recommended intervals to make a year. The arithmetic is published rather than implied, and it is what lets the price be read as an annual cost rather than a shelf price.

What is not here

No thread standard, no flow rate. The first is universal on this shelf — none of the seven cartridges publishes one. The second is nearly so: one cartridge here gives a flow figure, and it is a domestic under-sink element rather than anything carried.

Whose claims these are

The listing names organisms, particles and chemicals against several figures, and cites a laboratory and a report number for them. They are reported here attributed and nothing more is done with them: the maker states 99.9999 % of coliforms and Klebsiella pneumoniae, and states the other percentages it publishes for turbidity, microplastics, chlorine and heavy metals. Nothing on this page says what filtered water may be used for. That belongs to the maker’s instructions and to the authority local to wherever you are filling.

Before ordering

Check the name on your bottle. This set is sold for the C3 and names no other body, and a spare element bought for the wrong housing is not a compromise but a dead part.

Availability

Selling at about 23 € on the German, French, Italian and Spanish Amazon stores when this page was checked.

It also sells on the American and British Amazon stores in the local currency, which the range above does not cover — that range counts euro stores and nothing else.

Every figure in this section is what Keepa returned on the day this page was last updated. Prices and offers change without notice.

Prices quoted in this text were read on 6 September 2026. The live price is at the top of the page.

More water filter cartridges

  • MSR Guardian replacement cartridge for a pump water purifier

    MSR replacement cartridge for the Guardian pump purifier

    Four bullets, one of which names the pump it belongs to and three of which say nothing — five of the six columns here left blank, and the one that is filled is the one that decides.

    Compatible housings
    The maker's own Guardian pump purifier — stated in the title and in the first bullet
    Thread standard
    Not published on the listing
    Stated pore rating
    Not published on the listing
    Rated capacity
    Not published on the listing — no litre figure, no cycle count and no service interval appear
    Stated flow rate
    Not published on the listing
    Backflush method
    Not published on the listing
    Amazon reference
    B0199BGJ8C (same reference on 6 Amazon marketplaces)
    EAN
    0040818024072
    • Names the pump it belongs to in the title and again in the bullets, which is the one field a spare part cannot leave blank
    • Sold as the maker’s own cartridge for its own purifier, so the fit is the maker’s statement rather than an inference
    • Five of the six columns this hub compares are empty, matched here only by the under-sink cartridge

    Best for: Guardian pump owners buying the maker’s own cartridge, with the specification looked up in the manual rather than on the listing.

    ≈ $180 / £156 / 123 €
    Check price on Amazon
  • NATURBUMMLER replacement filter element for foldable water filter bottles

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    A replacement element sold for two named bottles from the same maker, with a 200 litre rated capacity and nothing published about the membrane behind it.

    Compatible housings
    The maker's own 750 ml and 1000 ml filter bottles — stated as compatible with both
    Thread standard
    Not published on the listing
    Stated pore rating
    Not published on the listing — no micron figure appears in the title or in any of the five bullets
    Rated capacity
    200 litres — stated in the title and repeated in the bullets
    Stated flow rate
    Not published on the listing
    Backflush method
    Not published on the listing — the maker describes changing the element in seconds without tools, which is replacement rather than cleaning
    Amazon reference
    B0C81HV4P1 (same reference on 1 Amazon marketplace)
    EAN
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    • Names the two bottles it belongs to, by capacity, in the first bullet — which is the question a spare element has to answer
    • The 200 litre figure is printed in the title rather than left for the small print
    • No pore rating anywhere, which leaves the column this hub leads with empty

    Best for: Keeping a NATURBUMMLER filter bottle in service without hunting for the model number.

    ≈ 15 €
    Check price on Amazon
  • OUTDOOR-FRIENDS EasyPress replacement filter element for a press-through water bottle

    OUTDOOR-FRIENDS EasyPress replacement element, 0.01 micron stated, 2000 litres

    A spare element publishing the finest pore rating and the second-longest capacity on this shelf, sold by a model number that the listing itself gives twice and differently.

    Compatible housings
    The maker's own EasyPress filter bottle — stated; the listing identifies the element by a model number, and the title and the recorded part number give different ones
    Thread standard
    Not published on the listing
    Stated pore rating
    0.01 micron — stated as 0.01 µm in the title
    Rated capacity
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    Stated flow rate
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    Backflush method
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    Amazon reference
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    EAN
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    • Publishes a pore rating and a capacity together in the title, which two of the seven cartridges here manage
    • 0.01 micron is the finest figure published on this shelf, and 2000 litres is second only to the 4000 litre element in this hub
    • The bullets describe the bottle — magnetic lid, grip band, handle — rather than the element being sold

    Best for: Replacing the element in an EasyPress bottle, once the model number on your own filter has been read off it.

    ≈ 24 €
    Check price on Amazon

Others worth keeping in the pack

  • Jewan retractable clothesline with an ABS body, hooks and windbreak clips

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    Length
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    Cord construction
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    End fittings
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    Tensioner type
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    Packed size
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    Pegs supplied
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    Amazon reference
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    EAN
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    • Ten metres that can be paid out to whatever length the pitch allows rather than a fixed run
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    • No weight and no packed size, on a product carrying a reel body around

    Best for: A pitch where the distance between two anchor points is unknown until you get there.

    ≈ 9 €
    Check price on Amazon
  • PAIDASHU black elastic travel clothesline with coloured pegs and steel hooks

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    Length
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    Cord construction
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    End fittings
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    Tensioner type
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    Stated weight
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    Packed size
    Not published on the listing
    Pegs supplied
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    Amazon reference
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    EAN
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    • Two stainless steel hooks, so the line goes up without a knot
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    Best for: A tent porch or a hotel bathroom, where a short elastic run and a bag of clips do the job.

    ≈ £7 / 9 €
    Check price on Amazon
  • Coil of Rayen grey nylon washing line

    Rayen nylon washing line, 20 metres, non-slip coating

    A twenty metre length of coated nylon rope sold for the house and the garden — the longest line here by a wide margin, and the only one supplied with nothing at all on the ends.

    Length
    20 m — stated in the title and repeated in the bullets as a generous length for a large amount of washing
    Cord construction
    High-strength nylon with a non-slip coating — stated; the maker describes the coating as what keeps clothes in place in windy weather, and describes no twist, braid or double line
    End fittings
    Not published on the listing — nothing is described at either end of the rope
    Tensioner type
    Not published on the listing
    Stated weight
    Not published on the listing
    Packed size
    Not published on the listing — no bag, reel or coil size is described
    Pegs supplied
    Not published on the listing — no pegs, clips or beads are mentioned anywhere on the listing
    Amazon reference
    B07Q1GSFYV (same reference on 6 Amazon marketplaces)
    EAN
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    • A non-slip coating is named, which is at least a claim about the surface rather than about the material alone
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