Product Price Filter Capacity (gallons) Flow Rate (GPM (Gallons Per Minute)) Contaminant Removal Installation Dimensions (inches (L x W x H)) Warranty
Culligan Culligan Countertop Filtration Faucet Mount Model FM-25
US
£25.25 200 gal 0.5 GPM Bad taste & odor, aesthetic chlorine taste & odor, sediment, lead, turbidity, atrazine, lindane, nominal particulate class I 4.87 in. length x 2.88 in. width x 3.46 in. height 2-year limited warranty

The Culligan FM-25 is a faucet-mounted filter that uses an FM-25R cartridge to reduce chlorine taste and odor plus lead, sediment, atrazine, lindane, and particulate class I. It has a compact chrome body, simple no-tools installation with faucet adapters, a filter life of up to 200 gal or 2 months, and a low filtration flow rate of 0.5 GPM. Suited for users wanting an inexpensive, easy-to-install on-tap filter for improving taste and basic contaminant reduction.

★ Ideal for

Ideal for reducing chlorine taste and odor because it is NSF-tested for chlorine reduction, uses activated-carbon based FM-25R cartridge, and has a rated filter capacity of 200 gal.

APEC APEC ROES-50 Essence Series
US
£172.34 50 gallons per day Removes up to 99% of contaminants including chlorine, taste, odor, fluoride, arsenic, lead, chromium 15.5 in L x 5.25 in W x 17 in H (system); tank 11 in x 11 in x 15 in 2 year extended manufacturer warranty with registration

The APEC ROES-50 Essence Series is a 5-stage under-sink reverse osmosis system that delivers up to 50 gallons per day and high contaminant rejection for very pure, great-tasting drinking water. It includes a 4-gallon storage tank, designer faucet, and full installation hardware, making it suitable for homes seeking robust RO performance and WQA certification.

★ Ideal for

Ideal for reducing chlorine taste and odor because its multi-stage RO system includes carbon block prefilters and a polishing carbon post-filter and removes up to 99% of chlorine and related taste and odor compounds.

ISPRING RCD100 5-Stage Countertop Reverse Osmosis System RCD100
US
£417.81 100 GPD 0.16 Gallons Per Minute Removes up to 99% of over 1,000 contaminants including chlorine, lead, PFAS, microplastics, heavy metals 15.5 L x 7 W x 15.5 H in 1-year

The iSpring RCD100 is a plug-and-play 5-stage countertop reverse osmosis dispenser with instant hot water, UV-C sterilization, and a tankless design. It delivers up to 100 GPD, removes up to 99% of 1,000+ contaminants and offers multiple temperature settings, suiting small households and offices seeking high-purity drinking water without plumbing. Filters are supplied as a replacement set lasting up to 2 years.

★ Ideal for

Ideal for reducing chlorine taste and odor because the 5-stage RO plus carbon-based stages remove chlorine and the system specifies removal of chlorine and up to 99% of contaminants.

Waterdrop Waterdrop G3 P800 Reverse Osmosis System G3P800
US
£633.44 800 GPD PFAS, fluoride, lead, chromium, heavy metals, bacteria and viruses (UV reduces 99.9%) 18.11 x 5.67 x 17.73 in 1 year

Tankless under-sink RO system with a 10-stage filtration including sediment, carbon, RO membrane and UV sterilizer producing up to 800 GPD; NSF/ANSI certified for multiple standards and includes optional smart faucet with TDS display. Suits users who want high-capacity, on-demand purified water without a storage tank and strong contaminant removal.

★ Ideal for

Well suited because its activated carbon stages plus RO membrane and UV sterilizer remove chlorine taste and odor and it has NSF certifications confirming chlorine reduction.

Waterdrop WD-A2 Countertop Reverse Osmosis B-WD-A2-RFSET
US
£297.70 1100 gallons 100 GPD chlorine fluoride arsenic lead PFOS PFOA TDS microplastics (RO + carbon + UV) 15.9 in x 8.2 in x 15.7 in 1 year

Countertop plug-in reverse osmosis dispenser with 5-stage filtration including 0.0001μm RO membrane, carbon block, and UV sterilization, a 159 oz feed tank and a 40 oz removable pitcher for instant hot, cold, or room-temperature water. Offers a high throughput (100 GPD), a 3:1 pure-to-drain ratio, and smart touch controls, suited for households wanting RO-level contaminant removal without under-sink installation. Filter lifespan is about 12 months or 1100 gallons.

★ Ideal for

Ideal for reducing chlorine taste and odor because it combines carbon block filtration with RO purification and UV, plus a 12-month/1100-gallon A2RF filter and a high flow capacity (100 GPD).