FL Water Demand Pump - Automatic Diaphragm Surface Pump

Multi-Use FL Water Demand Pump 

FL demand water pump delivers reliable, automatic water pressure for domestic and light commercial systems. Activating only when flow is required, it improves efficiency, reduces energy use, and protects pipework. Compact, quiet and easy to install, it’s ideal for boosting pressure from tanks and rainwater systems and ideal for water transfer.

The ideal pump for watering your garden & automotive water supply

The FL pumps come with a 13mm inlet and outlet, along with 0.5 inch male BSP fitting, meaning that standard garden hose can be connected; allowing you to water your garden without using a tap!

The FL Demand Pumps are available with different voltages, including:

• 12v DC
• 24v DC
• 110v
• 230v

Applications

The FL range of automatic demand pumps are ideal for a wide range of applications such as watering gardens, caravan water supply, chemical transfer, spraying, bowsers, pole window cleaning, car wash systems, dust suppression or vehicle mounted sprayers, automotive systems, showers, washing etc. 

Design and Performance

The FL Water Demand Pump is a quiet running, compact, automatic diaphragm pump that delivers up to 17 litres/minute flow at 3.0 bar pressure. The pump will switch on and off when a valve, tap or hose attachment is either closed or opened. 

The pumps are diaphragm pumps and thus do not require priming. They can run dry without damage. The pump can be mounted horizontally or vertically. 

The maximum suction lift is 2m and they are able to handle fluids that are up to 54 degrees centigrade. Each model includes a pre-filter as a back up safety device to prevent solid particles from entering the pump and damaging the diaphragm.

The motors have a 90% duty cycle during an operating period of 4.5 hours. Not to be turned off/on for than 15 times in a 60 minute period. 

The FL is designed for short, on-demand bursts of water rather than non-stop running. Across a typical working session of around 4 to 5 hours, the motor should be resting for roughly 10% of that time in total, made up of natural gaps between uses. There is also a limit of 15 starts per hour, marked on the motor itself. Staying within these limits protects the motor and keeps your guarantee valid.

Technical Specifications

Flow Rate: 17 litres per minute – sufficient for high-demand uses such as hoses, showers, or multiple taps at once.

Pressure: 3.0 bar maximum (approx 43 psi) shut-off pressure. The built-in pressure switch will turn the pump off at around this pressure.

Outlet/Inlet Size: 13 mm diameter ports. Comes with 13 mm (1/2″) hose barb connectors and a 1/2″ BSP threaded male fitting for standard garden hose attachments. 

Priming/Suction Lift: Self-priming up to 2 m vertical lift. You can place the pump up to 2 m above the water source level. For best results, keep it as close to the source as possible

Dimensions & Weight: Approx 75 mm × 280 mm (diameter × length). Weight around 2.5 kg dry. It’s compact enough for mobile use in caravans, vans & boats. Cable length is approx 195cms 

Water type: This pump is intended for clean (particle-free) water. If using pond, river, or rainwater, ensure the intake filter is attached and consider an additional pre-filter or sediment filter to prevent clogging. Avoid pumping muddy water, thick liquids, or fluids with large debris which could damage the diaphragm.

Please note: this is a surface pump and is not submersible, it must not get wet.

What's in the box:

• 1x FL Pump
• 2x 13mm Hose tails 
• 1 x 1/2" mBSP Connector
• 1x Filter