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
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
Common questions
InSinkErator 3N1 J-Shape vs Qettle Signature Modern 4-in-1 (Round Spout, 7L): frequently asked
- What is the difference between the InSinkErator 3N1 J-Shape and the 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. 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.
- Which is cheaper, the InSinkErator 3N1 J-Shape or the 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.
- Which is better for hard water, the InSinkErator 3N1 J-Shape or the Qettle Signature Modern 4-in-1 (Round Spout, 7L)?
- Both have built-in filtration, so both reduce scale in the tank. In a hard water area, plan to replace the cartridge closer to every 6 months rather than 12.
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InSinkErator 3N1 J-Shape vs...
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