Do I need a plumber to install an under-sink filter?

Basic under-sink filters like the Waterdrop 10UA use push-fit connectors and can be installed DIY. More complex systems may need a plumber.

How is an under-sink filter different from reverse osmosis?

Under-sink carbon filters remove chlorine, lead, and some chemicals but leave minerals in. Reverse osmosis removes virtually everything, including fluoride, PFAS, and nitrates.

Under-Sink Filters

Hidden under your kitchen sink, these filters provide high-capacity filtration without cluttering your counter.

Best for: Homeowners wanting set-and-forget filtration with high capacity · £45–£120

Not sure which to pick? Check your water first.

Try your postcode — e.g. SW1A, M1, B1

Waterdrop 10UA Under Sink

Under-Sink Filter · NSF/ANSI 42

Why it fits: Massive 11,000-gallon filter life — lasts most households a year
Simple DIY installation with push-fit connectors
Compact body fits easily under standard UK sinks
Trade-offs: Fewer contaminants removed than RO systems
Needs a dedicated filtered-water tap or adapter

Typical price

£75approx.

Check current price at Waterdrop

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Doulton HIP Ultracarb

Under-Sink Filter · NSF/ANSI 42, NSF/ANSI 53

Why it fits: Ceramic element removes 99.99% of bacteria
British-made with over 190 years of heritage
NSF 42 + 53 dual certification for lead and cysts
What it won't do: Does not remove PFAS or fluoride

Typical price

£120approx.

Check current price on Amazon

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Side-by-side comparison

Filter	Price	Rating	Chlorine	Lead	PFAS (total)	Bacteria	Microplastics	Copper	Annual Cost
Waterdrop 10UA Under Sink (opens in new tab) High-volume under-sink filtration without RO complexity	£75	4.4							£30/yr
Doulton HIP Ultracarb (opens in new tab) Families wanting bacteria and lead removal from a trusted UK brand	£120	4.6							£80/yr

Common questions

Do I need a plumber to install an under-sink filter?: Basic under-sink filters like the Waterdrop 10UA use push-fit connectors and can be installed DIY. More complex systems may need a plumber.
How is an under-sink filter different from reverse osmosis?: Under-sink carbon filters remove chlorine, lead, and some chemicals but leave minerals in. Reverse osmosis removes virtually everything, including fluoride, PFAS, and nitrates.

We may earn a commission when you buy through our links, at no extra cost to you. Recommendations are based on water quality data, not sponsorship. Affiliate disclosure