Model vs model
Franke Maris Water Hub 3-in-1 Mechanical
vs InSinkErator 3N1 J-Shape
The InSinkErator 3N1 J-Shape lists at £899, £90 less than the Franke Maris Water Hub 3-in-1 Mechanical at £989.
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.
Franke
Franke Maris Water Hub 3-in-1 Mechanical
Boiling water from a pull-and-turn knob, with no electronics above the sink
Typical price: £989
Full review →
InSinkErator
InSinkErator 3N1 J-Shape
Steaming hot, hot and cold from a slim J-shape spout
Typical price: £899
Full review →The differences at a glance
- The InSinkErator 3N1 J-Shape lists at £899, £90 less than the Franke Maris Water Hub 3-in-1 Mechanical at £989.
- The Franke Maris Water Hub 3-in-1 Mechanical 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 14 W for the Franke Maris Water Hub 3-in-1 Mechanical, which compounds into the standby cost difference below.
- Tank capacity: 4 L on the Franke Maris Water Hub 3-in-1 Mechanical 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 dispenses filtered drinking water; the Franke Maris Water Hub 3-in-1 Mechanical does not.
- The InSinkErator 3N1 J-Shape ships with a 5-year warranty; the Franke Maris Water Hub 3-in-1 Mechanical 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 | Franke Maris Water Hub 3-in-1 Mechanical | InSinkErator 3N1 J-Shape |
|---|---|---|
| Typical price | £989 | £899✓ |
| Boiling temperature | 100°C✓ | 98°C |
| Tank capacity | 4 L | 2.5 L |
| Idle power | 14 W | 11 W✓ |
| Peak power | 1650 W | 1300 W |
| Flow rate | - | - |
| Filtered water | No | Yes✓ |
| Sparkling water | No | No |
| Chilled water | No | No |
| Filter type | Franke Pro M: five-stage, with ion-exchange resin and a 5 micron carbon block | - |
| Finishes | 3✓ | 2 |
| Warranty | 2 years | 5 years✓ |
| Released | - | 2020 |
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
Franke Maris Water Hub 3-in-1 Mechanical
No price-checked retailer offers for this model yet. Get a supply + installation quote instead →
InSinkErator 3N1 J-Shape
- Amazon UKCheck price at retailerView ↗
Price checked on 27 Aug 2026.
Standby energy
What the idle draw adds up to over a year.
Franke Maris Water Hub 3-in-1 Mechanical
- Idle draw
- 14 W
- Standby energy / year
- 123 kWh
- Standby cost / year
- £33
InSinkErator 3N1 J-Shape
- 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
Franke Maris Water Hub 3-in-1 Mechanical
What we like
- The mechanical control needs a deliberate pull and turn, so a wiped worktop or a stray hand cannot start boiling water
- Pan-fill lock holds the flow open, which a spring-loaded control will not do
- A genuine 100°C rather than the 98°C most rivals settle for
- Around £140 less than the electronic version of the same system
Watch out for
- No filtered cold drinking water, and unlike the electronic model it cannot be upgraded to 4-in-1 later
- Two-year guarantee on tap, tank and filter housing, shorter than the Instante
- The Pro M cartridge runs about £80 a year and skipping it invalidates the guarantee
- Needs a 35 mm tap hole and a worktop no thicker than 50 mm
InSinkErator 3N1 J-Shape
Common questions
Franke Maris Water Hub 3-in-1 Mechanical vs InSinkErator 3N1 J-Shape: frequently asked
- What is the difference between the Franke Maris Water Hub 3-in-1 Mechanical and the InSinkErator 3N1 J-Shape?
- The InSinkErator 3N1 J-Shape lists at £899, £90 less than the Franke Maris Water Hub 3-in-1 Mechanical at £989. The Franke Maris Water Hub 3-in-1 Mechanical 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 14 W for the Franke Maris Water Hub 3-in-1 Mechanical, which compounds into the standby cost difference below.
- Which is cheaper, the Franke Maris Water Hub 3-in-1 Mechanical or the InSinkErator 3N1 J-Shape?
- The InSinkErator 3N1 J-Shape lists at £899, £90 less than the Franke Maris Water Hub 3-in-1 Mechanical at £989.
- Which is better for hard water, the Franke Maris Water Hub 3-in-1 Mechanical or the InSinkErator 3N1 J-Shape?
- The InSinkErator 3N1 J-Shape has a built-in filter, the better choice in a hard water area: it reduces scale build-up in the tank and improves taste. The Franke Maris Water Hub 3-in-1 Mechanical has no built-in filtration, so its tank will scale faster without a separate softener.
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