DIY Watermakers for Boats - 115/230 V AC
21 GPH / 79 LPH  to  70 GPH / 260 LPH

Build your modular watermaker to your budget and preferences.

ECHOTec Economy Watermakers come with everything you need to install onboard and produce freshwater from the sea. If the high-pressure pump will be installed less than 40cm below the waterline, an optional seawater feed pump will be required. Customize to your preferences with the options and upgrades in the below table.


The workhorse AML Yacht Series is entered for specifications and cost comparison and as a benchmark for ultimate performance and reliability.


Please call or email with any question you may have (WhatsApp/Phone: +1 868 382 2323, e-mail: info[AT]

Economy AC-21

Pressure vessel with standard gauges and regulator

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Economy AC-21 shown with optional remote control panel



+1868 382 2323

Optional Equipment and Upgrades

Upgrade Economy 21

Upgrade motor, high pressure pump and membrane vessel/s to

40 GPH / 152 LPH

55 GPH / 210 LPH

70 GPH / 260 LPH


High-Pressure Pump Head

Corrosion resistant Stainless steel AISI 316 pump head, ceramic pistons, and stainless valves versus Nickel plated brass head, ceramic pistons, and stainless valves. Increase warranty on pump head from 2 years to 5 years.


High-Pressure Pump (Low Noise Pump Upgrade)

Extremely silent pump design. Quietest pump on the market. Only available in combination with the AISI 316 stainless steel pump head upgrade. This pump comes with a lifelong warranty.


High-Pressure Hoses

Standard: 2 pcs 5’ / 1.5m fixed length hoses (can be ordered in lengths to fit your installation) with AISI 316 compression fittings.

Upgrade: 15’ / 4.5m high pressure hose with field attachable AISI 316 O-ring sealed fittings.


Fittings and Regulator

DUPLEX 1.4462 (similar to 2205) is more costly and more difficult to form and machine but achieves almost twice the corrosion resistance of AISI 316 stainless steel.

DUPLEX has been successfully used for all high-pressure fittings and pressure regulators of ECHOTec commercial desalination systems for the past 10 years. The Duplex package includes a lifetime warranty and comes now with all DML Series watermakers. It is available as an option for the Economy Series.


Pump Motor Epoxy Sealed

Completely sealed and Epoxy plus Polyurethane coated wash-down motor versus standard motor.


Anti-Vibration Pump Mount

Anti-vibration motor/pump unit mount with specially engineered soft vibration dampers. This feature dramatically reduces noise transfer into the hull.


Duplex Upgrade Membrane Vessel Assembly

DUPLEX 1.4462 versus AISI 316 vessel components come with a lifelong warranty for the complete membrane vessel.


Filter Brackets 3pcs.

Extremely rigid brackets from AISI 316 versus painted standard aluminum brackets.


Remote Control Panel

AISI 316 stainless steel control panel for remote operation (completely assembled).


Electrical Control Unit

Automatic low voltage breakers actuate waterproof enclosed heavy-duty 24 VAC double pole motor starters for the feed pump and high-pressure pump. Prewired and ready to connect.


High Pressure Gauge

Upgrade: All AISI 316 stainless steel with Monel bourdon tube

Standard: Plated brass connection with AISI 304 case and AISI 316 bourdon tube.


Braided Hose / AISI 316 hose clamps

Upgrade: 40’ braided hose with 29 pcs AISI 316 hose clamps

Standard: 15” Polypropylene tubing


Manual Product Diverter Valve

3-Way valve to switch from dumping (the first high salinity product) to filling the tank with potable product water. Complete with AISI 316 mounting bracket.


Cleaning/Storage 3-Way Service Valve

Allows infusion of cleaning and storage solutions with the flick of a valve.

Complete with AISI 316 mounting bracket.


Hardener / pH neutralizer

Complete kit with mineral element and AISI 316 stainless steel bracket


Feed Pump, Centrifugal / Feed Pump, Diaphragm

While the magnetic drive seal-less centrifugal pump is more costly, it does not deplete as much as diaphragm pumps. The centrifugal pump is recommended as it provides constant feed flow, without building unnecessary pressure that results in excessive power consumption and wear.


A diaphragm pump is a positive displacement pump which will be feeding another positive displacement pump. Cheaper but not a good combination.


Filter Condition Gauge AISI 316L / AISI 303

The low-pressure gauge indicates when the pre-filters have to be changed or the through-hull becomes clogged (barnacles etc.).


Upgrade: All AISI 316 stainless steel with Monel bourdon tube

Standard: Plated brass connection with AISI 304 case and AISI 316 bourdon tube.


TDS Meter, Real Time

Fixed installed, indicates the product quality in real time.


Freshwater Flush Kit

The fresh water flush kit enables to store the watermaker for up to 10 days without the use of chemicals (biocide). The fresh water flush storage can be repeated every 10 days.


Upgrade: Flash Kit (Valve) contains: 1 Filter housing, 1 active carbon cartridge, Bracket (AISI 316SS), shut-off valve, 2 hose barb connectors, 1 Tee connector, 10 ft. braided hose, 5 hose clamps (AISI 316SS).


Flush Kit (Basic) contains: 1 Filter housing, Non-return valve, 1 active carbon cartridge, Aluminum bracket, 2 tube connectors.


Flush Timer

Battery operated timer for manual flush or automatically repeated flush at operator’s selected interval and duration.

Please contact us with your enquiry/order