40 or 60 L/h
Choose the 2521 membrane (695 mm vessel) for 40 L/h where space is tight, or the 2540 (1,200 mm vessel) for 60 L/h if you have the length.
Photos show a LEDI Modular kit. Your membrane layout and control option may look different.
Configurable CAT-powered watermaker
LEDI Modular Expedition
A CAT 2SF10SEEL plunger pump with your choice of one 2521 or one longer 2540 membrane, in 12V or 24V. Choose the membrane to suit the space you have and the water you need each day.
- Output
- 40 L/h
- Total power
- About 660 W
- Pump
- CAT 2SF10SEEL
- Remote panel or local control on every model
- Built and supported on the Gold Coast
- Questions? Call +61 494 562 668
Before you buy, check space, power and source water
Space
Separate pump, filtration and membrane modules, plus the remote panel if you choose it. Each needs room for hoses, cables and service access.
Membrane layout1 × 2521
Module dimensionsSee installation planning
Power
Runs directly from your DC battery bank. Size cables, fuse and isolator for the current draw, and make sure your charging can keep up with your daily run time.
Voltage12V DC
Current draw55 A at 12 V
Total system powerAbout 660 W
Source water
Designed for seawater up to 40,000 ppm and also handles brackish water. Feed-water limits: SDI below 5, up to 45 °C, free chlorine below 0.1 ppm, pH 2–11. For bore, dam or river water, talk to us first, because sediment, iron or other contaminants may need extra pre-treatment.
Do not use chlorinated town water. Chlorine damages RO membranes.
Why choose the Expedition
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Configurable CAT-powered watermaker
CAT 2SF10SEEL pump
A larger CAT triplex plunger pump than the Explorer's, sized for higher daily production.
12V or 24V
All four voltage and membrane combinations are available.
Remote panel or local control
Choose the remote panel to put the gauges and pressure control at the helm, in a cabinet or inside your vehicle, or save $690 with local control on the membrane module.
Where the Expedition fits
Boats
Cruising yachts, catamarans and power boats
Purpose-built expedition vehicles
Only expedition trucks and large off-road caravans with suitable space and power. It is not a typical 4×4 fit-out.
Off-grid
Cabins, stations and remote properties
Module layout
Separate modules, installed where they fit
Each module mounts separately and connects with hoses and cables, so you can work around lockers, engine bays, canopies or plant rooms instead of finding space for one large cabinet.
1
High-pressure pump
CAT 2SF10SEEL with the feed pump. This module does the work, so mount it somewhere with ventilation and room for servicing.
2
Prefiltration
Cartridge filters that protect the pump and membrane. Mount them where you can reach them easily for cartridge changes.
3
Membrane & pressure vessel
Your selection: 1 × 2521. The 2540 vessel is 1,200 mm long, about 500 mm longer than the 695 mm 2521 vessel, so check the length you have available.
4
Remote control panel Option
Controls and instruments in one panel you mount at the helm, in a cabinet or inside your vehicle, away from the pump module. Or save $690 with local control: the gauges and needle valve sit on the membrane module and the pump switches go in a small 3D-printed switch module.
See it at true size
Try each module in your own space
Spin a module here. On your phone, tap View in your space to place it at true size in the locker, engine bay, canopy or plant room you have in mind, then check hose runs and service access.
The scale is locked to true size in AR. Drag with one finger to slide a module, twist with two to turn it. Works on recent iPhone and Android phones.
What's in the kit
What LEDI supplies, and what you plan
Supplied by LEDI
- Pump module: CAT 2SF10SEEL high-pressure plunger pump (316 stainless steel)
- Pump module: brushless continuous-duty feed pump, 1/2″ ID intake hose, intake sea strainer and full wiring loom
- Prefilter module: 20 µm and 5 µm pleated prefilters plus a 5 µm carbon block (all 2.5″ × 10″)
- Prefilter module: programmable auto-flush controller, 316 stainless non-return valves and pressure gauge
- Membrane module: one SW30 RO membrane (2521 or 2540, as selected) and housing, end caps, brine restrictor and mounting brackets, pre-charged with storage solution
- Remote control panel (remote panel option): high- and low-pressure gauges, needle valve, sample valve, flow meter, TDS meter and pump switches, with 1.5 m hoses
- Local control option: pressure relief valve, high-pressure gauge and needle valve on rigid tube at the membrane housing; low-pressure gauge on a push-fit line from the prefilter module; TDS sensor and flow meter inline on the product-water line; pump on/off switches in a 3D-printed switch module on the wiring loom
- Installation drawings and user manual
Standard protections
- Feed-pump dry-run protection
- Feed-pump blocked-port protection with automatic restart
- Programmable auto-flush to protect the membrane between runs
Planned for your installation
These items depend on your boat, vehicle or building, so you or your installer supply and fit them.
- Seawater or source-water inlet from your seacock or pickup (1/2″ ID hose)
- Freshwater flush connection from your pressure-water system (3/4″ BSP female)
- Brine outlet overboard or to a suitable drain (1/4″ push-fit tube)
- Product-water line to your tank (1/4″ push-fit tube)
- DC supply to the pump module: cable rated for up to 70 A, with fuse and isolator sized for your voltage
- Mounting surface and fasteners suited to your boat, vehicle or building
- Installation labour and commissioning (DIY or your installer)
Specifications
Specifications for Expedition · 12V · 1 × 2521 · Remote panel
| Model | LEDI Modular Expedition |
|---|---|
| High-pressure pump | CAT 2SF10SEEL |
| Voltage | 12V DC |
| Membrane layout | 1 × 2521 |
| Rated output | 40 L/hSeawater at 25 °C |
| Recommended operating pressure | 850 psi (59 bar) |
| Current draw | 55 A at 12 V |
| Total system power (incl. feed pump) | About 660 W |
| Controls | Remote control panel |
| SKU | LEDI-MOD-EXPEDITION-12V-2521-RP |
Output depends on water temperature, salinity and operating conditions. Rated figures are measured under the conditions shown.
Installation planning
Plan the installation before you order
Membrane layout: 1 × 2521
Drawn to scale from LEDI’s installation drawings. Allow extra length for hose connections at each end.
Module dimensions (W × H × D)
| Pump module | 510 × 270 × 195 mm |
|---|---|
| Membrane vessel | 695 mm long × 80 mm Ø |
| Feed pump | Ø63 × 113 mm (200 mm wide with fittings) |
| Seawater inlet strainer | 120 × 130 mm |
| Prefilter module | 735 × 320 × 130 mm |
| Remote panel | 211 × 201 × 139 mm |
Installation space incl. service access
| Inter-module hoses | 1.5 m supplied (longer runs on request) |
|---|---|
| Remote panel | Within 1.5 m of the pump module |
| Suction head | 3 m vertical · 15 m horizontal |
Module weights
| Pump module (incl. feed pump) | 19 kg |
|---|---|
| Membrane vessel (2521) | 4.5 kg |
| Prefilter module | 4 kg |
| Remote panel | 5.5 kg |
| Seawater inlet kit (strainer and hose) | 2.5 kg |
| Total kit | 35.5 kg |
Shipping package
| Main carton | 800 × 400 × 300 mm · 50 kg |
|---|---|
| Total shipping weight | 50 kg |
How the modules connect
- Supplied by LEDI
- Planned and supplied for your installation
- Control and instrument lines
- DC power
Schematic only. Configuration-specific installation and wiring drawings are included in the documentation.
Documentation
Want to check the fit before ordering? Send us your measurements and we will review your layout.
Maintenance & support
Running and looking after your Expedition
Automatic freshwater flush
The prefilter module has a programmable auto-flush controller connected to your pressurised freshwater supply. After each run it draws fresh water through the carbon block, which removes chlorine, and across the membrane to clear residual seawater. It can also be set to flush at 1, 3 or 7-day intervals while the watermaker is not in use.
Maintenance
| Every 3–6 months | Replace the 20 µm and 5 µm pleated prefilters (standard 2.5″ × 10″) |
|---|---|
| Every 6 months | Replace the 5 µm carbon block (2.5″ × 10″) |
| Every 2–3 years | Replace the RO membrane (SW30 2521 or 2540, as fitted), with regular auto-flushing |
| As needed | CAT pump service kit, stocked by LEDI |
Gold Coast support
LEDI builds and supports its watermakers on the Gold Coast. Talk to us about choosing a configuration, planning your installation, commissioning or finding replacement parts.
Frequently asked questions
Do I need the remote panel?
It's optional. The remote panel puts the gauges, pressure control and water-quality readouts in one place you can reach easily, such as the helm, a cabinet or inside your vehicle. With local control, the high-pressure gauge, pressure relief valve and needle valve sit on the membrane module, the low-pressure gauge connects to the prefilter, the TDS sensor and flow meter fit inline on the product-water line, and the pump switches are in a 3D-printed switch module you can mount wherever is convenient. Choose local control to save $690 if the membrane module will be within easy reach.
2521 or 2540: which should I choose?
The 2521 gives 40 L/h and the 2540 gives 60 L/h. The 2540 vessel is 1,200 mm long, about 500 mm longer than the 695 mm 2521 vessel, so check the layout diagram and the installation space for your selection before choosing it.
Can I install it myself?
Many owners do. Installation involves mounting, plumbing, wiring and commissioning. Follow the supplied manual and use a qualified marine or auto electrician for any wiring you are not confident with.
What water can it treat?
It is designed for seawater and also handles brackish water. For bore, dam or river water, talk to us first because sediment, iron or other contaminants may need extra pre-treatment. Never feed it chlorinated town water: chlorine damages RO membranes.
What should I check before ordering?
Your DC voltage, battery capacity and charging, the space for each module including service access, and the routes for intake, brine discharge, product water, freshwater flush, hoses and cables. Send us measurements and we will check the fit.
Compare the LEDI Modular range: Compact, Explorer, Expedition and Outpost →