Model vs model
Grohe Red Duo L-Size
vs Zip HydroTap Classic
The Grohe Red Duo L-Size lists at £1,625, £2,740 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.
For either tap. Free and no obligation.
Grohe
Grohe Red Duo L-Size
99°C filtered boiling water plus a full hot-and-cold mixer
Typical price: £1,625
Full review →
Zip Water
Zip HydroTap Classic
Boiling, chilled, sparkling, filtered
Typical price: £4,365
Full review →The differences at a glance
- The Grohe Red Duo L-Size lists at £1,625, £2,740 less than the Zip HydroTap Classic at £4,365.
- Tank capacity: 5.5 L on the Grohe Red Duo L-Size versus 4 L on the Zip HydroTap Classic. Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Zip HydroTap Classic dispenses sparkling water; the Grohe Red Duo L-Size does not.
- The Zip HydroTap Classic dispenses chilled water; the Grohe Red Duo L-Size does not.
- The Zip HydroTap Classic ships with a 3-year warranty; the Grohe Red Duo L-Size with a 2-year warranty.
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 | Grohe Red Duo L-Size | Zip HydroTap Classic |
|---|---|---|
| Typical price | £1,625✓ | £4,365 |
| Boiling temperature | 99°C | 99°C |
| Tank capacity | 5.5 L | 4 L |
| Idle power | - | 35 W |
| Peak power | 2100 W | 2000 W |
| Flow rate | - | - |
| Filtered water | Yes | Yes |
| Sparkling water | No | Yes✓ |
| Chilled water | No | Yes✓ |
| Filter type | BWT active carbon | Zip GlobalPlus 0.2 micron filter |
| Finishes | 2 | 5✓ |
| Warranty | 2 years | 3 years✓ |
| Released | - | 2021 |
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
Strengths and trade-offs
Grohe Red Duo L-Size
What we like
- Boiling, filtered and a full hot-and-cold mixer in one tap, no second tap hole
- Large 5.5L boiling reserve (7L total) on the L-size boiler
- Child-safe touch-button dispensing with ChildLock as standard
- Sells around £1,625 at UK specialists, far below the £2,578 list price
Watch out for
- 99°C dispense, not a true 100°C boil (despite Grohe’s "100°C" marketing)
- At around £1,625 it is still a premium tap, though far below its £2,578 list
- BWT filter must be changed yearly or every ~600L, an ongoing cost
- Standard guarantee is 2 years (3 only with registration), shorter than InSinkErator or Franke
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