Unvented - Glass Lined Tank
5, 10 and 15 litre


Ideal for use in cloakrooms and kitchens in offices, shops, student accommodation and domestic premises which have been extended and there is no central hot water system near by. One unit located under the kitchen sink is often used to supply hot water for light dish washing in the kitchen sink and hand washing in the cloakroom basin.

Selection Guide (approximate depending on usage)
1 basin: SF05K
1 – 2 basins: SF10K
2 – 3 basins: SF15K

Click here to view our Speedflow Key Points Card



• Supplies hot water for up to 3 basins
• Can be used with regular taps including mixers
• Mains pressure flow rates
• 2.0 kW element as standard
• 1.2 kW element available for 10 and 15 litre models for restricted load applications
• Neon element on indicator
• Glass lined steel tank as standard
• External temperature control with frost protection setting

• Accessories may be needed to comply with the Water Regulations. Pressure reducing valve required for pressures above 4.2 bar and expansion vessel and check valve required if cold water draw off nearby. Kits available separately
(see Speedflow Kits).
• Flow Through Kits now available (see Flow Through Kits)
• Optional thermostatic mixing valve available (see Thermostatic Mixing Valve)
• Not suitable for hair wash basins in hairdressing salons
• New stainless steel tank 10 & 15 litre model available (See Speedflow Stainless Steel Tank)

Technical Specification

Outer Casing
Easy clean, high impact plastic

Heating Element
Stainless steel flange type

Bulb type adj. to 75°C
E setting approx. 50°C

Water Tank
Glass lined steel

Replaceable grey magnesium (inspect at least annually or more regularly in scale/ aggressive water conditions)

High density polyurethane foam

Overheat temperature protection (manual reset).
Supplied pressure relief valve must be fitted in every case (set at 6 bar).
Frost protection if power on.
Optional thermostatic mixing valve to maintain hot water supplied to user at constant, safe temperature.

IP Rating

Site above or below the sink, but inlet and outlet must be at the top.

Floor standing or wall mounted.

Must be installed by a suitably qualified person.

Access to the thermal cut-out and element is located at the base of unit.

Minimum water pressure 0.5 bar.
Maximum water pressure 4.2 bar.

Water connection
Inlet/ Outlet 2 x 1/2" BSP male (100mm apart centre to centre).
Fittings required (not supplied): 2 x 15mm compression to 1/2" BSP female adapter.

Electrical Connection
Installation must comply with current IEE regulations.

The product should be connected to the fixed wiring of the property via a double pole fused spur with a minimum break capacity of 13 amps.

Cable pre-wired (1.5m).


Standard Warranty
1 year parts or replacement warranty.

Data Tables

Product CodeCapacity (litres)Power (kW)Heat Up Time (mins)*Standing Loss (kWh/day)
SF10K102.0 120.63
SF15K152.0 180.71

* Minimum theoretical heat up time for 70% tank capacity from 10°C to 60°C

Product CodeHeight (mm)Width (mm)Depth (mm)Weight Empty (kg) Weight Full (kg)
SF05K3202802455.5 10.5
SF10K, SF10K12 4103102806.8 16.8
SF15K, SF15K125303102808.3 23.3


Spare parts are available through our stockists.

A list of spare parts available for our current range is shown below.

For further help or advice please contact our customer services team on 01924 225 200 - we can usually help, for example, help diagnosing which part you need, help if you require spare parts for obsolete models or if you need fast delivery.

Product CodeDescriptionSpare Parts for Product Code
SFELEMENTK or SFELEMENTKRSpeedflow SF10 & SF15 2kW element c/w anode - product code depends on batch number.SF10K, SF15K
SF05ELEMENTK Speedflow SF05 2kW element 5L c/w anodeSF05K
SFELEMENT12K or SFELEMENT12KRSpeedflow SF10 & SF15 1.2kW element c/w anode - product code depends on batch number.SF10K12, SF15K12
SFTHERMAKSpeedflow Thermal Cut-OutSF05K, SF10K, SF15K SF10K12 SF15K12
SFTHERMOKSpeedflow thermostatSF05K, SF10K, SF15K, SF10K12, SF15K12
SFBRKTKSpeedflow wall fixing bracket SF05K, SF10K, SF15K, SF10K12, SF15K12
SFANODEKSpeedflow spare anodeSF05K, SF10K, SF15K, SF10K12, SF15K12
SFDIALKSpeedflow thermostat control knob SF05K, SF10K, SF15K, SF10K12, SF15K12
PRV30TSpeedflow 3 bar pressure reducing valve 1/2''SF05K, SF10K, SF15K, SF10K12, SF15K12
MSV60TSpeedflow 6 bar pressure relief valve 1/2''SF05K, SF10K, SF15K, SF10K12, SF15K12
SFSWITCHKSF10K & SF15K Power SwitchSF10K, SF15K

Energy Efficiency

The Energy Related Products (ErP) Directive and Energy Labelling Directive require that from September 2015 all water heaters in scope meet minimum energy performance criteria and have energy labels which provide the energy ration of the product. The classifications range from A++; this being the most efficient and coded in green to a rating of G; this being less efficient and coded in red.

Such ratings provide transparency of efficiency and a comparable benchmark for water heating products, as standardised European Energy Labels are used.

This website contains the energy class for all relevant water heating products. The full energy label and product fiche information for the Speedflow range can be found below