ATC Undersink Water Heaters



For commercial applications ATC Undersink Water Heaters are the ideal solution for supplying a number of sinks depending on the hot water demand without the need for special taps. This can prove more cost effective than installing a traditional vented system.


  • Easy to install
  • Available in 5 litre, 10 litre and 15 litre .
  • High density polyurethane foam insulation which reduces radiant heat loss reduces energy consumption and ensures high energy efficiency.
  • Exclusive dry powder porcelain enamel tank lining delivering twice the corrosion resistance of ordinary glass lining.
  • Fitted with heavy duty seamless bolt – on square flange type heating elements which are more durable and efficient.
  • Fitted with premium protective magnesium anode rod which equalises aggressive water action and provides extra protection against corrosion.
  • External thermostat control allows adjustment to preferred water temperature.
  • Fitted with limiting device to provide protection of overheating.
  • Supplied with expansion relief valve calibrated at 6 Bar
  • 5 litre and 10 litre:  Wall or Floor mounting (supplied with wall brackets)
  • 15 litre:  Floor or Shelf Mounting


Product Code Z5-U Z10-U Z15-U
Capacity (L/Gal) 5L/1.1 Gal 10L/2.21 Gal 15L/3.3 Gal
Power (W) 2000W 2000W 2000W
Voltage (V) 230V 230V 230V
Frequency (Hz) 50 / 60 Hz 50 / 60 Hz 50 / 60 Hz
Max Pressure (Bar) 6 Bar 6 Bar 6 Bar
Connections 1/2″ 1/2″ 1/2″
Thermostat External External External
Approvals  CCC, CE, RoHs  CCC, CE, RoHs CCC, CE, RoHs
Heat Up Time 9 Minutes 21 Minutes 32 Minutes

Expansion Vessels & Accessories

Part Code/Description
KIT-A         2 Litre Expansion Vessel with 1/2″ BSP Connection. Suitable for 5L, 10L and 15L Water Heaters
KIT-B         KIT B Pressure Reducing Valve
KIT-C         KIT-C Tundish 406807


ATC 5 Litre Capacity Undersink Water Heater 2kW
ATC 10 Litre Capacity Undersink Water Heater 2kW.
ATC 15 Litre Capacity Undersink Water Heater 2kW
Expansion Vessel
2L Expansion Vessel with 1/2 " BSP for 5L, 10L & 15L Water Heaters
KIT B Pressure Reducing Valve
KIT-C Tundish 406807


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