Model vs model
Grohe Red Duo L-Size
vs Zip HydroTap G5 Celsius Arc (3-in-1)
The Grohe Red Duo L-Size lists at £1,625, £446 less than the Zip HydroTap G5 Celsius Arc (3-in-1) at £2,071.
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 G5 Celsius Arc (3-in-1)
Arc spout for filtered boiling plus mains hot and cold
Typical price: £2,071
Full review →The differences at a glance
- The Grohe Red Duo L-Size lists at £1,625, £446 less than the Zip HydroTap G5 Celsius Arc (3-in-1) at £2,071.
- The Grohe Red Duo L-Size dispenses at 99°C; the Zip HydroTap G5 Celsius Arc (3-in-1) tops out at 98°C.
- Tank capacity: 5.5 L on the Grohe Red Duo L-Size versus 3 L on the Zip HydroTap G5 Celsius Arc (3-in-1). Bigger tanks serve more cups back to back; smaller tanks take less cupboard space.
- The Zip HydroTap G5 Celsius Arc (3-in-1) ships with a 3-year warranty; the Grohe Red Duo L-Size 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 | Grohe Red Duo L-Size | Zip HydroTap G5 Celsius Arc (3-in-1) |
|---|---|---|
| Typical price | £1,625✓ | £2,071 |
| Boiling temperature | 99°C✓ | 98°C |
| Tank capacity | 5.5 L | 3 L |
| Idle power | - | 30 W |
| Peak power | 2100 W | 2200 W |
| Flow rate | - | 4 L/min |
| Filtered water | Yes | Yes |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | BWT active carbon | Zip MicroPurity 0.2 micron filter |
| Finishes | 2 | 4✓ |
| Warranty | 2 years | 3 years✓ |
| Released | - | 2023 |
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
Grohe Red Duo L-Size
- Amazon UKCheck price at retailerView ↗
Zip HydroTap G5 Celsius Arc (3-in-1)
No price-checked retailer offers for this model yet. Get a supply + installation quote instead →
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 G5 Celsius Arc (3-in-1)
What we like
- 0.2-micron MicroPurity filter removes dirt, lead, microplastics and 99.9% of cysts
- Cool-touch tap with boiling isolation and safety lock
- Boiling flow of 4 litres per minute
- Seven finishes and a 12-month filter interval
Watch out for
- Factory-set to 98°C rather than true 100°C boiling
- Needs both hot and cold supply at 1.7 bar minimum
- Three-year warranty (five on the tank)