Model vs model
Qettle Signature Modern 4-in-1 (4L)
vs Quooker Flex
The Qettle Signature Modern 4-in-1 (4L) lists at £870, £380 less than the Quooker Flex at £1,250.
Every number below comes from the manufacturers' own specification sheets. We highlight which tap leads on each spec; what matters most for your kitchen is your call.
For either tap. Free and no obligation.
Qettle
Qettle Signature Modern 4-in-1 (4L)
Square-spout 100°C boiling tap in marine-grade stainless steel
Typical price: £870
Full review →
The differences at a glance
- The Qettle Signature Modern 4-in-1 (4L) lists at £870, £380 less than the Quooker Flex at £1,250.
- Declared idle draw is 10 W for the Quooker Flex against 14 W for the Qettle Signature Modern 4-in-1 (4L), which compounds into the standby cost difference below.
- Tank capacity: 4 L on the Qettle Signature Modern 4-in-1 (4L) versus 3 L on the Quooker Flex. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Qettle Signature Modern 4-in-1 (4L) dispenses filtered drinking water; the Quooker Flex does not.
Full specification, side by side
Sourced from manufacturer datasheets. A tick marks the better number on specs where more or less is objectively better.
| Spec | Qettle Signature Modern 4-in-1 (4L) | Quooker Flex |
|---|---|---|
| Typical price | £870✓ | £1,250 |
| Boiling temperature | 100°C | 100°C |
| Tank capacity | 4 L | 3 L |
| Idle power | 14 W | 10 W✓ |
| Peak power | 1500 W | 1600 W |
| Flow rate | - | - |
| Filtered water | Yes✓ | No |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | Q08 extruded carbon block cartridge | Active carbon filter inside the tank |
| Finishes | 5 | 6✓ |
| Warranty | 2 years | 2 years |
| Released | 2021 | 2023 |
Where to buy
Checked manually and dated; the retailer's page is always the live source. Affiliate links, disclosed as such. Commission never changes our comparisons. How affiliate links work here
Qettle Signature Modern 4-in-1 (4L)
- Amazon UKCheck price at retailerView ↗
Quooker Flex
No price-checked retailer offers for this model yet. Get a supply + installation quote instead →
Standby energy
What the idle draw adds up to over a year.
Qettle Signature Modern 4-in-1 (4L)
- Idle draw
- 14 W
- Standby energy / year
- 123 kWh
- Standby cost / year
- £33
Quooker Flex
- Idle draw
- 10 W
- Standby energy / year
- 88 kWh
- Standby cost / year
- £24
Assumes the manufacturer's declared idle wattage around the clock at £0.27/kWh (UK average, mid-2026). Real usage adds the energy to heat the water you actually draw. Run your own numbers in the running cost calculator.
Strengths and trade-offs
Qettle Signature Modern 4-in-1 (4L)
What we like
- 4-litre tank serves up to 8 cups in one go
- Marine-grade stainless steel tap, engineered in the UK
- Two-stage child safety: button and turn before boiling water flows
- Choice of round or square spout in stainless, PVD colour or etched finishes
Watch out for
- 17.5-minute initial heat-up and 10-minute recovery after a full tank
- Standard kit does not include a pressure reducing valve
- Two-year warranty
Quooker Flex
What we like
- Pull-out hose rinses sinks plus full 100°C boiling
- Same vacuum-insulated tank delivers true boiling water
- Magnetic dock returns hose neatly after use
- Boiling flow auto-locks when hose is detached from base
Watch out for
- £1,250 RRP matches Fusion despite extra moving parts
- Trustpilot owners report hose fraying within several years
- Hose replacement is a paid call-out, not 5-min DIY
- Requires 500mm depth + 200mm width clear undersink space