Model vs model
InSinkErator 3N1 J-Shape
vs Qettle Signature Modern 4-in-1 (Round Spout, 7L)
The InSinkErator 3N1 J-Shape lists at £899, £46 less than the Qettle Signature Modern 4-in-1 (Round Spout, 7L) at £945.
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.
InSinkErator
InSinkErator 3N1 J-Shape
Steaming hot, hot and cold from a slim J-shape spout
Typical price: £899
Full review →
Qettle
Qettle Signature Modern 4-in-1 (Round Spout, 7L)
Higher-capacity 7L boiler for larger households
Typical price: £945
Full review →The differences at a glance
- The InSinkErator 3N1 J-Shape lists at £899, £46 less than the Qettle Signature Modern 4-in-1 (Round Spout, 7L) at £945.
- The Qettle Signature Modern 4-in-1 (Round Spout, 7L) dispenses at 100°C; the InSinkErator 3N1 J-Shape tops out at 98°C.
- Declared idle draw is 11 W for the InSinkErator 3N1 J-Shape against 18 W for the Qettle Signature Modern 4-in-1 (Round Spout, 7L), which compounds into the standby cost difference below.
- Tank capacity: 7 L on the Qettle Signature Modern 4-in-1 (Round Spout, 7L) versus 2.5 L on the InSinkErator 3N1 J-Shape. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The InSinkErator 3N1 J-Shape ships with a 5-year warranty; the Qettle Signature Modern 4-in-1 (Round Spout, 7L) with a 2-year warranty.
The two taps in a kitchen
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 | InSinkErator 3N1 J-Shape | Qettle Signature Modern 4-in-1 (Round Spout, 7L) |
|---|---|---|
| Typical price | £899✓ | £945 |
| Boiling temperature | 98°C | 100°C✓ |
| Tank capacity | 2.5 L | 7 L |
| Idle power | 11 W✓ | 18 W |
| Peak power | 1300 W | 1700 W |
| Flow rate | - | - |
| Filtered water | Yes | Yes |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | - | Q08 extruded carbon block cartridge |
| Finishes | 2 | 5✓ |
| Warranty | 5 years✓ | 2 years |
| Released | 2020 | 2022 |
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
InSinkErator 3N1 J-Shape
- Amazon UKCheck price at retailerView ↗
Qettle Signature Modern 4-in-1 (Round Spout, 7L)
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.
InSinkErator 3N1 J-Shape
- Idle draw
- 11 W
- Standby energy / year
- 96 kWh
- Standby cost / year
- £26
Qettle Signature Modern 4-in-1 (Round Spout, 7L)
- Idle draw
- 18 W
- Standby energy / year
- 158 kWh
- Standby cost / year
- £43
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
InSinkErator 3N1 J-Shape
Qettle Signature Modern 4-in-1 (Round Spout, 7L)
What we like
- 7-litre tank serves up to 14 cups in one go, sized for larger households
- Four separate waterways and no electronic components in the tap
- Two-stage child safety: button and turn before boiling water flows
- Marine-grade stainless steel tap, engineered in the UK
Watch out for
- 20-minute initial heat-up and 15-minute recovery after a full tank
- Two-year warranty
More comparisons with these taps
InSinkErator 3N1 J-Shape vs...
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