Model vs model
Arno Square 4-in-1
vs InSinkErator GN1100
The InSinkErator GN1100 lists at £389, £110 less than the Arno Square 4-in-1 at £499.
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 GN1100
Compact dedicated steaming-hot tap to pair with your mixer
Typical price: £389
Full review →The differences at a glance
- The InSinkErator GN1100 lists at £389, £110 less than the Arno Square 4-in-1 at £499.
- Tank capacity: 2.5 L on the InSinkErator GN1100 versus 2.4 L on the Arno Square 4-in-1. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Arno Square 4-in-1 ships with a 3-year warranty; the InSinkErator GN1100 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 | Arno Square 4-in-1 | InSinkErator GN1100 |
|---|---|---|
| Typical price | £499 | £389✓ |
| Boiling temperature | 98°C | 98°C |
| Tank capacity | 2.4 L | 2.5 L |
| Idle power | 11 W | 11 W |
| Peak power | 1500 W | 1300 W |
| Flow rate | - | - |
| Filtered water | Yes | Yes |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | 2-stage filter: PP cotton + activated carbon block | - |
| Finishes | 4✓ | 2 |
| Warranty | 3 years✓ | 2 years |
| Released | 2023 | 2018 |
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
Arno Square 4-in-1
No price-checked retailer offers for this model yet. Get a supply + installation quote instead →
InSinkErator GN1100
- Amazon UKCheck price at retailerView ↗
Price checked on 27 Aug 2026.
Standby energy
What the idle draw adds up to over a year.
Arno Square 4-in-1
- Idle draw
- 11 W
- Standby energy / year
- 96 kWh
- Standby cost / year
- £26
InSinkErator GN1100
- Idle draw
- 11 W
- Standby energy / year
- 96 kWh
- Standby cost / year
- £26
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
Arno Square 4-in-1
What we like
- £499 RRP delivers 4-in-1 cheaper than most rivals
- 2-stage filtration removes chlorine and heavy metals
- 360° swivel spout handles pot-filling and rinsing
- Child-safe spring-loaded boiling dispense as standard
Watch out for
- 98°C ceiling not true 100°C boiling
- 2.4L tank yields only 7-8 cups before recovery
- Limited independent reviews outside Arno marketing
- Newer brand lacks long-term UK reliability track record
InSinkErator GN1100
Common questions
Arno Square 4-in-1 vs InSinkErator GN1100: frequently asked
- What is the difference between the Arno Square 4-in-1 and the InSinkErator GN1100?
- The InSinkErator GN1100 lists at £389, £110 less than the Arno Square 4-in-1 at £499. Tank capacity: 2.5 L on the InSinkErator GN1100 versus 2.4 L on the Arno Square 4-in-1. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space. The Arno Square 4-in-1 ships with a 3-year warranty; the InSinkErator GN1100 with a 2-year warranty.
- Which is cheaper, the Arno Square 4-in-1 or the InSinkErator GN1100?
- The InSinkErator GN1100 lists at £389, £110 less than the Arno Square 4-in-1 at £499.
- Which is better for hard water, the Arno Square 4-in-1 or the InSinkErator GN1100?
- 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.