Description
Blue Lagoon Flow Switch Plus 230 V type F 5056579
The Blue Lagoon Flow Switch Plus 230 V type F (article 5056579) is a compact flow sensor and safety switch for pool installations.
It monitors the water flow in the return line and automatically switches off connected electrical devices, such as UV-C units or heaters,
when the flow is too low. This prevents dry running, overheating and premature wear of sensitive equipment.
Key features of the Blue Lagoon Flow Switch Plus
- Designed to protect UV-C systems, electric heaters and other pool devices against operation without sufficient water flow.
- Automatic shutdown of the connected device when the flow drops below the minimum threshold.
- Compact control box with 230 V type F plug for quick connection to a standard socket.
- Includes 63 mm tee fitting for easy integration into new or existing PVC pipework.
- Suitable for both freshwater and saltwater (salt chlorinated) swimming pools.
- Simple on and off status indication and straightforward operation for residential pool owners.
Technical specifications
- Brand: Blue Lagoon
- Model: Flow Switch Plus type F
- Article number: 5056579
- Power supply: 230 V AC, 50 Hz (type F plug)
- Maximum load: Up to 10 A (suitable for most domestic UV-C units and small heaters)
- Electrical protection class: Approximate IP54 splash resistant housing
- Hydraulic connection: 63 mm PVC tee fitting with integrated flow sensor
- Minimum flow rate: Around 1.5 m³/h
- Maximum flow rate: Around 23 m³/h
- Typical installation: In the return line after the filter and before UV-C or heater
Application and compatibility
The Blue Lagoon Flow Switch Plus is designed as a universal safety accessory for pool equipment that must not operate without flow.
It is especially recommended in combination with Blue Lagoon UV-C systems, electric heaters and other third party devices that rely on
continuous water circulation for cooling or proper disinfection performance.
- Suitable for most UV-C purification units up to the specified current rating.
- Recommended for compact electric heaters to prevent overheating at low or zero flow.
- Can be used with other 230 V devices such as dosing pumps or controllers, as long as the load does not exceed 10 A.
- Compatible with PVC installations using 63 mm pipework, with the option to adapt to 50 mm or smaller sizes via reducers.
Because the control box uses a standard 230 V type F plug, the device is easy to integrate into existing technical rooms without complex wiring.
The protected outlet of the Flow Switch Plus is then used to power the UV-C unit, heater or other equipment that must be monitored.
How the Blue Lagoon Flow Switch Plus works
The Flow Switch Plus uses a mechanical flow sensor housed in the 63 mm tee.
When the filtration pump is running and the flow is between the specified minimum and maximum values, the internal switch closes and allows power to reach
the connected device. If the pump is switched off or if the flow drops below the minimum value, the sensor opens the circuit and cuts the power supply.
- Prevents devices from running dry when valves are closed or the pump is stopped.
- Helps avoid damage to UV-C lamps, quartz sleeves and heater elements caused by overheating.
- Supports safer operation in pools with variable speed pumps or bypass circuits around certain equipment.
Installation guidelines
- Install the 63 mm tee in a vertical section of the return pipe, respecting the indicated flow direction on the sensor body.
- Ensure the water flow always moves from bottom to top through the sensor tee to minimise the risk of air pockets.
- Use appropriate PVC cleaner and glue when integrating the tee into rigid pipework and allow full curing before pressurising.
- Mount the control box in a dry, well ventilated technical room, protected from direct splashes and sunlight.
- Connect the Flow Switch Plus with its 230 V plug to a grounded socket that is suitable for pool equipment and protected by an RCD.
- Plug the UV-C unit or other protected device into the output of the Flow Switch Plus according to the manufacturer instructions.
After installation, start the filtration pump and check that the connected device switches on only when adequate flow is present and switches off promptly
when the pump is stopped or the flow is interrupted.
Use, safety and maintenance
- Periodically inspect the flow sensor area for deposits or debris that could affect movement or sensitivity.
- Check that unions and glued joints around the tee remain watertight and free from leaks.
- Verify the operation of the safety function at the start of each season by stopping the pump and confirming that the protected device switches off.
- Do not exceed the specified maximum current rating when connecting equipment to the Flow Switch Plus.
- Have any electrical modifications in the technical room carried out by a qualified electrician in line with local regulations.
With correct installation and periodic checks, the Blue Lagoon Flow Switch Plus 230 V type F 5056579 provides an effective additional safety layer for UV-C units,
heaters and other electrical devices in the pool system, helping to extend their service life and reduce the risk of damage caused by insufficient water flow.
