RoyalFlow C2 Smart Tap
A high-performance undersink smart tap for the home: instant boiling, chilled and sparkling filtered water, with a hot & cold mixer for dishwashing. Reliable, energy-efficient and purpose-built for residential kitchens.
About the RoyalFlow C2 Smart Tap
The RoyalFlow C2 is an undersink smart tap made for the home. It gives instant boiling, chilled and sparkling filtered water, plus ambient water and a hot and cold mixer for dishwashing, all from one touch-button tap. The datasheet rates the 2 litre boiling tank for 75 cups an hour, and the 1.5 litre chilled and sparkling tank for 50 cups an hour.
It is for residential use only. For an office or other commercial site, see the RoyalFlow BCS. RoyalFlow is Sovereign Water's own smart tap range, so we specify, supply, fit and service it ourselves. For the full range and the home options, see the RoyalFlow home range.
At a glance
- What it is
- A residential undersink smart tap with four waters from one tap
- Water types
- Boiling, chilled, sparkling and ambient, plus a hot and cold mixer for dishwashing
- Boiling
- 2 L tank, rated 75 cups an hour
- Chilled and sparkling
- 1.5 L tank, rated 50 cups an hour
- Controls
- Touch-button tap
- Undersink unit
- 23 × 43.5 × 39.5 cm (W × D × H)
- Power
- 0.7 kW hot plus 0.3 kW cold, AC 110-220 V, 50/60 Hz
- Build
- NSF-rated, with auto power-down when idle
- Warranty
- 1 year, manufacturer
What it does.
- One tap, every water you want: boiling, chilled, sparkling and ambient
- 2 L boiling tank: 75 cups/hour
- 1.5 L chilled & sparkling tank: 50 cups/hour
- Hot & cold mixer for dishwashing built into the same tap
- Intelligent eco mode with auto power-down
- Compact 23 cm wide undersink unit
Typical applications
Who the RoyalFlow C2 is for
- Families who want boiling, chilled and sparkling water at the kitchen sink, instead of a kettle, a fridge jug and bottled fizz.
- Kitchens where the tap should also work as the everyday mixer, because the C2 has a hot and cold mixer for dishwashing.
- Homes where a clean worktop matters, since the tanks sit in an undersink unit only 23 cm wide.
- Households that want a unit that powers itself down when idle, to keep running costs in check.
- Buyers who want treatment as part of the package, because the tap can be paired with a Sovereign treatment system for the local water.
How the RoyalFlow C2 Smart Tap works
The datasheet shows five steps from mains to glass: the municipal mains, a treatment system, the boil and chill tanks, CO₂ carbonation and touch-tap dispense. Mains water passes through treatment if you have specified it, then fills the 2 litre boiling tank and the 1.5 litre chilled tank in the undersink unit. Sparkling water is carbonated with CO₂, and ambient water is room-temperature filtered water.
An efficiency controller powers the unit down during periods of inactivity. The datasheet says this saves energy without losing responsiveness. The hot side is rated at 0.7 kW and the cold side at 0.3 kW, on AC 110-220 V at 50/60 Hz.
Treatment is optional and sold separately. The datasheet says it can be customised for regional water profiles, including reverse osmosis where required. For why that matters, see our guide to filtration versus treatment.
Which one should you choose?
The C2 is the home model in the RoyalFlow range. We settle the choice at survey, from your kitchen, your cabinet space and your water.
RoyalFlow C2
You are fitting a home kitchen, and want boiling, chilled and sparkling plus a hot and cold mixer in one tap.
RoyalFlow BCS Smart Tap
The tap is for an office or other commercial site, with a bigger 3 L boiling tank and a 2.5 L chilled tank.
Zip HydroTap G5 Arc Plus
You want a Zip system, sized by variant. Our Zip HydroTap review covers the models.
Installation and servicing
The undersink unit measures 23 × 43.5 × 39.5 cm (width × depth × height), so check the sink cabinet before you order. The datasheet lists the scope of supply: the RoyalFlow C2 smart tap and undersink unit (model CHR-M1), the touch-button tap with a hot and cold mixer for dishwashing, and the connection fittings for the municipal water supply.
Sparkling water needs a CO₂ supply. We confirm the CO₂ arrangement and the plumbing for the mixer with you at survey. A Sovereign treatment system and a Comprehensive Maintenance plan are optional extras. The survey is chargeable and is credited back if you go ahead.
The unit carries a 1 year manufacturer warranty. Sovereign Water supplies, fits and services it.
RoyalFlow C2 Smart Tap questions answered
What is the RoyalFlow C2?
A residential undersink smart tap. It gives instant boiling, chilled and sparkling filtered water, plus ambient water and a hot and cold mixer for dishwashing.
How much boiling and chilled water can it supply?
The boiling tank holds 2 litres and is rated for 75 cups an hour. The chilled and sparkling tank holds 1.5 litres and is rated for 50 cups an hour.
Can it replace the kitchen tap?
It includes a hot and cold mixer for dishwashing, so it can work as the everyday kitchen mixer as well. We confirm the plumbing at survey.
How hot is the boiling water?
The datasheet calls it boiling, and near-boiling on its specification tile. It gives no temperature, so we do not quote one.
How big is the undersink unit?
23 × 43.5 × 39.5 cm (width × depth × height).
How much power does it use?
The hot side is 0.7 kW and the cold side is 0.3 kW, on AC 110-220 V at 50/60 Hz. An efficiency controller powers the unit down when it is idle.
Is it for homes or offices?
Homes only. The datasheet says residential applications only. For an office, see the RoyalFlow BCS.
Is it NSF-rated?
The datasheet describes the construction as NSF-rated.
Does it need water treatment?
Treatment is optional and sold separately. A Sovereign treatment system can be customised for your local water, including reverse osmosis where required.
Does it make fizzy water?
Yes. Sparkling water is carbonated with CO₂ and dispensed from the same tap.
What warranty does it have?
One year, from the manufacturer. You can add a Comprehensive Maintenance plan.
Do you supply, fit and service it?
Yes. We supply it, fit it and service it. The survey is chargeable and is credited back if you go ahead.
Related products
Figures come from the manufacturer datasheet (PDF). Reviewed November 2026.
Supplied, installed and serviced across the UK
Across most of southern and eastern England, mains water is very hard. Rain filtering through chalk and limestone dissolves calcium and magnesium, and that scale coats heating elements, so we size every system to your supply and your equipment.
Tell us about your site and what you need the water for. We specify the system, fit it and keep it running under Comprehensive Maintenance.
Source: Drinking Water Inspectorate, Drinking Water Quality in England triennial report (2020–2022).
Interested in the RoyalFlow C2 Smart Tap?
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