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Under sink water filter choices for uncluttered London kitchens
Four configurations. Prices from £84.61. Giga double units cost £163.92.
Keep filtration below the worktop with standard, Giga and double Olympus units from £84.61.
Keep the main filter below your worktop
An under sink water filter gives you a permanent point for filtered drinking and cooking water while keeping the main unit out of sight. This can suit a kitchen where worktop room is limited or you prefer a clear area around the sink. The standard Olympus model costs £84.61, while the Giga version costs £96.95. Double options add a second filtration stage, with the standard double priced at £133.95 and the Giga double at £163.92. We supply each unit for fitting by you or an installer you choose.

Check the cupboard before choosing a model
Measure the usable height and width below the sink, allowing room for hoses and future cartridge changes. Your pipework, water pressure and tap arrangement also affect the connection method. A standard system may suit moderate household use, while a Giga or double configuration provides a different capacity or combination of filtration media. Access matters as much as size because you'll need to reach the housing when a refill is due. We can explain product differences, but fitting and alterations to plumbing aren't included.
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Browse our full range of water purification products and filters.
Shop Under Sink Water FiltersDiscreet filtration with practical access
Clearer worktop space
The filter body stays in the cupboard rather than beside your sink.
Four useful formats
Choose standard, Giga, double or Giga double configurations.
Replaceable cartridges
Maintain the system without replacing its complete outer housing.
Questions and answers
How much cupboard space does an under-sink filter need?
Space varies by model, so measure the available height, width and depth before ordering. Leave additional room around the housing for hoses, connection points and the movement needed to remove and replace a cartridge.
Can you install an under-sink system for us?
No. We supply the product only, and you can fit it yourself if appropriate or arrange your own installer. Check the pipework, pressure and tap arrangement first so the selected model matches the intended connection.
Which under-sink configuration should we choose?
Consider your daily water use, available cupboard room and filtration needs. Standard and Giga units use one main housing, while double versions allow two compatible media stages within the point-of-use system.
Choose an under-sink configuration
Call us with your cupboard measurements, pipework details and expected water use before ordering.

