Model vs model
Arno Square 4-in-1
vs Zip HydroTap Classic
The Arno Square 4-in-1 lists at £499, £3,866 less than the Zip HydroTap Classic at £4,365.
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.
The differences at a glance
- The Arno Square 4-in-1 lists at £499, £3,866 less than the Zip HydroTap Classic at £4,365.
- The Zip HydroTap Classic dispenses at 99°C; the Arno Square 4-in-1 tops out at 98°C.
- Declared idle draw is 11 W for the Arno Square 4-in-1 against 35 W for the Zip HydroTap Classic, which compounds into the standby cost difference below.
- Tank capacity: 4 L on the Zip HydroTap Classic 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 Zip HydroTap Classic dispenses sparkling water; the Arno Square 4-in-1 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 | Arno Square 4-in-1 | Zip HydroTap Classic |
|---|---|---|
| UK RRP | £499✓ | £4,365 |
| Boiling temperature | 98°C | 99°C✓ |
| Tank capacity | 2.4 L | 4 L |
| Idle power | 11 W✓ | 35 W |
| Peak power | 1500 W | 2000 W |
| Flow rate | - | - |
| Filtered water | Yes | Yes |
| Sparkling water | No | Yes✓ |
| Chilled water | Yes | Yes |
| Filter type | 2-stage filter: PP cotton + activated carbon block | Zip GlobalPlus 0.2 micron filter |
| Finishes | 4 | 5✓ |
| Warranty | 3 years | 3 years |
| Released | 2023 | 2021 |
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
Zip HydroTap Classic
- Idle draw
- 35 W
- Standby energy / year
- 307 kWh
- Standby cost / year
- £83
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
Zip HydroTap Classic
What we like
- Filtered boiling, chilled and sparkling from one tap
- Touchscreen with PIN protection and energy-saving sleep modes
- 0.2 micron NSF-certified filter included as standard
- Largest UK engineer network for service and maintenance
Watch out for
- £4,365 RRP is several times rival 4-in-1 prices
- Installation around £520 extra on top of hardware
- Ongoing CO2 canister costs for sparkling function
- Designed primarily for commercial use, residential overkill