Onga Tankbuddy OTBIW330FL iWaterSwitch Kit 0.65kW Submersible Manual Pump (Max 90LPM/340kPa)

The Onga Tankbuddy OTBIW330FL iWaterSwitch Kit is a complete automatic rainwater harvesting solution, combining the proven 0.65kW Tankbuddy submersible pressure pump with the intelligent Onga iWaterSwitch rainwater controller. Designed for reliable household water reuse, this system automatically manages pump operation and seamlessly switches between tank water and mains supply when required.

The Tankbuddy pump is specifically engineered for submersible operation in rainwater tanks and treated water pump-out chambers. It features an optimised multistage hydraulic system for strong performance with lower energy consumption, delivering up to 33m head and 5600 L/h flow capacity (approx. 90LPM peak performance range depending on installation). The aluminium die-cast and stainless steel pump body provides excellent corrosion resistance and long service life in submerged conditions.

Paired with the iWaterSwitch, this kit becomes a fully automatic, demand-sensing rainwater supply system. The iWaterSwitch automatically switches between harvested rainwater and mains water and does not require a separate pump controller to monitor pressure and flow. It features patented Demand Sensing Flow Management to prevent system cycling and ensure smooth operation.

APPLICATIONS

• Toilets
• Laundry supply
• Garden irrigation
• Washdown
• General non-potable household water supply

FEATURES

• 0.65kW (650W) absorbed power
• Maximum head: 33m (3.3 bar / approx. 340kPa system rating)
• Maximum flow: 5600 L/h (up to ~90LPM)
• Multistage hydraulics for improved efficiency
• Aluminium die-cast and stainless steel pump body
• Mechanical seal for durability
• Inbuilt thermal overload protection
• Fully insulated cable connection chamber
• Handles clean water with suspended solids up to 2mm
• 10m H07 RN8-F power cable with ANZ plug
• 1¼” discharge outlet

iWATERSWITCH FEATURES

• Fully functional LCD display
• Real-time flow rate, pressure and pump current readings
• Adjustable cut-in and cut-out flow rates
• Adjustable maximum run time
• Built-in backflow prevention for mains and tank supply
• Demand sensing by flowrate to prevent system cycling
• Automatic switching between rainwater and mains supply
• Watermark approval (WMKA 40087)
• AS/NZS 4020 certification

SPECIFICAITONS

• Model: OTBIW330FL (Tankbuddy + iWaterSwitch Kit)
• Pump Type: Submersible multistage pressure pump
• Power (P1): 650W (0.65kW)
• Voltage: 230V / 50Hz
• Rated Current: 3A
• Maximum Head: 33m (3.3 bar / approx. 340kPa system rating)
• Maximum Flow: 5600 L/h (up to approx. 90LPM)
• Number of Impellers: 3
• Maximum Fluid Temperature: 40°C
• Maximum Immersion Depth: 7m
• Minimum Operating Space: 500mm diameter
• Pump Outlet: 1¼” BSP
• Power Cable: 10m H07 RN8-F with ANZ plug
• Pump Body: Aluminium die-cast and stainless steel
• Mechanical Seal: Heavy-duty design
• Solids Handling: Suitable for clean water with particles up to 2mm