Important: Replacement cartridges are system-specific. Always match the exact model or cartridge code before ordering; similar-looking filters are not necessarily interchangeable.
How we compare replacement filters
AVERQUA compares compatibility, current UK price, manufacturer-stated service life, cartridge format and stock status. We prioritise exact model matching over generic “fits many systems” claims.
CompatibilityExact systems and cartridge codes supported.
PriceCurrent direct or manufacturer-listed price when available.
Service lifeManufacturer guidance, not a universal guarantee.
AvailabilityIn stock, sold out or stockist-only where published.
| Replacement | Compatible system | Price checked | Stated life | Availability |
|---|
| Waterdrop RF10 | 10UA / 10UB | £32.99 | Up to 12 months | Sold out |
| Waterdrop RF10-UF | 10UA-UF | £40.00 | System-dependent | In stock |
| Frizzlife FZ-2 | MK99 / MP99 | £22.99 | 6–12 months stated | Unavailable |
| BRITA P 1000 | BRITA filter taps / mypure systems | Check retailer | Up to 1,200 L / 12 months | Direct shop unavailable |
| AQUAPHOR Crystal H Set | Crystal H | £59.99 | Up to 6,000 L stated | Available |
| Doulton Biotect Ultra 2501 | Doulton DUO/TRIO and other listed systems | £29.45 | Check system guidance | In stock |
| BWT TFCART | Taste Fresh Protection | Check stockist | 3–6 months general BWT guidance | Stockist-only |
Direct-connect replacement
Waterdrop RF10
£32.99*
The direct replacement cartridge for Waterdrop 10UA/10UB under-sink systems. Waterdrop currently lists the RF10 as sold out on its UK site.
Pros- Exact OEM replacement
- Low replacement cost relative to full system
- Quick-change format
Consider- Currently sold out
- Match 10UA/10UB before ordering
- Service life varies with use and water quality
*Waterdrop UK price and stock status checked 1 October 2026. Illustrative product graphic.
Ultrafiltration replacement
Waterdrop RF10-UF
£40.00*
The replacement cartridge listed for the Waterdrop 10UA-UF ultrafiltration system, which uses a 0.01 μm membrane stage.
Pros- Exact OEM UF replacement
- Current UK stock shown
- Simple repeat-purchase item
Consider- Only for compatible UF systems
- Not interchangeable with standard RF10
- Replacement timing depends on use
*Waterdrop UK price and stock status checked 1 October 2026. Illustrative product graphic.
MK99 / MP99 core filter
Frizzlife FZ-2
£22.99*
The inner replacement cartridge for Frizzlife MK99 and MP99 systems. Frizzlife states a typical 6–12 month replacement interval.
Pros- Low cartridge cost
- Only inner core needs replacing
- Simple model matching
Consider- Currently unavailable
- Do not confuse with MK-HF outer-housing kit
- Replacement timing depends on water quality
*Frizzlife UK price and availability checked 1 October 2026. Illustrative product graphic.
Filter-tap replacement
BRITA P 1000
Check retailer
A replacement cartridge used across BRITA filter-tap systems, with a manufacturer-stated capacity of up to 1,200 litres or 12 months depending on consumption and hardness.
Pros- Long stated service interval
- Works across BRITA filter-tap range
- Established replacement ecosystem
Consider- Direct BRITA UK shop currently unavailable
- Capacity varies with hardness
- Check P 1000 vs P 3000 requirement
Manufacturer specifications and availability checked 1 October 2026. Illustrative product graphic.
Three-cartridge set
AQUAPHOR Crystal H Replacement Set
£59.99*
A complete three-cartridge replacement set for the Crystal H system, including K3, KH and K7 cartridges.
Pros- Complete system refresh in one set
- Current direct UK price
- Designed for Crystal H hard-water setup
Consider- Higher upfront cartridge cost
- Only for Crystal H configuration
- Capacity depends on water conditions
*AQUAPHOR UK price checked 1 October 2026. Illustrative product graphic.
Doulton ceramic replacement
Doulton Biotect Ultra 2501
£29.45*
Doulton’s Biotect Ultra ceramic replacement filter, compatible with Doulton DUO, TRIO and other listed under-sink/countertop systems.
Pros- Approved Doulton affiliate link installed
- Made-in-Britain product
- Fits multiple Doulton systems
Consider- Confirm compatibility with the exact housing
- Service life depends on system and usage
- Some DUO setups use an additional second-stage cartridge
*Doulton UK price checked 1 October 2026. This is an affiliate link. Illustrative product graphic.
Taste Fresh replacement
BWT TFCART
Check stockist
The replacement cartridge code supplied with BWT’s Taste Fresh Protection system. BWT directs buyers to local stockists for replacement cartridges.
Pros- Simple OEM replacement code
- Stockist network
- Designed for slim BWT kit
Consider- No direct UK price published
- Replacement interval depends on use and water quality
- Check TFCART vs TFPCART carefully
Manufacturer compatibility and replacement guidance checked 1 October 2026. Illustrative product graphic.
How to avoid buying the wrong replacement
Match the model code
Use the exact system and cartridge code, not just the brand name or cartridge shape.
Check the interval
Manufacturer replacement intervals are estimates. Heavy use, high sediment or harder water can shorten service life.
Compare annual cost
A cheaper system can become more expensive if it needs frequent replacement cartridges, so compare yearly maintenance as well as purchase price.
