Onga Tankbuddy OTBIW450FL 0.65kW Submersible Manual Pump with iWaterSwitch Kit (Max 84LPM/270kPa)

The Onga Tankbuddy OTBIW450FL iWaterSwitch Kit delivers a quiet, efficient, and reliable water supply solution for homes using rainwater and mains water interchangeably. Powered by a 0.65kW stainless steel submersible pump, it’s perfect for rainwater harvesting, treated water pump-out chambers, and general clean water transfer.

This complete kit includes the advanced Onga iWaterSwitch—an intelligent changeover device that automatically selects rainwater when available and seamlessly switches to mains water when the tank runs low. The fully functional LCD screen displays real-time flow, pressure, and current readings while tracking your total rainwater usage, helping you maximise water savings.

Compact, corrosion-resistant, and precision-engineered, the OTBIW450FL operates quietly while delivering up to 84 L/min and 27 m head. When combined with the iWaterSwitch, it becomes an automatic, demand-sensing household pressure system ideal for toilets, washing machines, car washing, and garden irrigation.

APPLICATIONS

• Domestic rainwater-to-mains water supply
• Tank or sump emptying of clean water
• Garden and lawn irrigation
• General water transfer for homes and light commercial use
  

KEY FEATURES

• 0.65kW submersible pump with stainless steel body for strength and corrosion resistance
• Max. flow: 84 L/min, max. head: 27 m (270 kPa)
• Precision moulded internals for high efficiency and long service life
• Dual lip seal and fully insulated cable chamber for pump protection
• Inbuilt thermal overload to prevent motor damage
• iWaterSwitch:
  • Automatic rain-to-mains switching with no user intervention
  • Demand-sensing by flow rate to prevent pump cycling (Patent 2011244897)
  • Direct-acting solenoid for robust and reliable changeover
  • Fully functional LCD display showing flow rate, pressure, and current
  • Rainwater usage tracking for water savings monitoring
    

SPECIFICAITONS

• Motor: 0.65kW, 240V, single-phase
• Max. Flow: 84 L/min
• Max. Head: 27 m
• Inlet: 25mm BSP (F)
• Outlet: 25mm BSP (F)
• Pump Body: Stainless steel
• Cable Length: 10 m
• Max. Water Temp: 35°C
• iWaterSwitch Inlet/Outlet: 25mm BSP (F)