SeaMaker 30 Gallon per Hour Water Maker Model

Fresh Water Production
High Pressure Pump Amps
120/220V AC
Boost Pump
SM30 33/7909.3/4.88.2$5550
SM30-50Hz30/72012.8/6.4 (110-220v)8.2$5750

Our best-selling water maker is the SM30 and we think the reasons are relatively straight forward:

1. 50% more fresh water Production.
The only difference between the SM20 and SM30 is that the SM20 has a single 40″ RO membrane while the SM30 adds a second 40″ RO membrane plumbed in series. This allows membrane one to produce 20GPH while membrane two produces an additional 13GPH. This gives you over a 50% increase in fresh water production for the exact same power usage, generator run time, and support equipment.

2. Redundancy
If one of the two RO membranes were to fail you can easily re-plumb and run the unit on a single RO membrane and continue along with a 20GPH water maker until you get a replacement RO membrane.

3. Relative Cost adder over the SM20
The price difference between the SM20 and SM30 is $900. This minimal increase in cost will get you over 50% more fresh water production along with the redundancy feature of having two independent membranes.

We made a YouTube video discussing the differences between the SM20, SM30 and SM40 water maker manuals. You can view the video at this link:
YouTube Video Link

Here is a detailed description of the 5 modules that comprise the SM30 water maker.

Module 1: High Pressure Pump and Motor Assembly
One General Pump Company triplex plunger pump with a 316 stainless steel manifold and wetted parts, solid ceramic plungers and a nickel-plated crankcase for anti-corrosion mechanically coupled to a 1.0Hp 120/220VAC electric motor. Fitted with a pressure relief valve preset to 1000 PSI. Inlet and outlet fittings supplied and installed on pump.

Module 2: RO Pressure Vessel Assembly
Two filament wound fiberglass/epoxy pressure vessel.
Two SW30-2540 Dow Filmtec Polyamide thin-film composite high salt rejection RO Membrane (The Gold Standard in RO Membranes, not a discount off-brand)
Four fiberglass clamps affixed to fiberglass mounting feet, two per pressure vessel
One 3ft long 3/8″ high pressure braided stainless steel silicone covered hose for connecting the high-pressure pump outlet to the RO pressure vessel. (Longer hose available upon request for an additional charge)

Module 3: Pre-filter and Boost Pump Assembly
Two 10” clear filter housings with mounting brackets
One 20-micron pre-filter element
One 5-micron pre-filter element
One self-priming 12V DC variable speed Jabsco boost pump
(Also available in120VAC and 24VDC)

Module 4: Valving and Cleaning Assembly
One clear filter housing with mounting bracket
One activated carbon filter element
Two 3-way valves for selecting:

  1. normal operation of inlet seawater
  2. fresh water rinse from ships tanks
  3. or pickling solution from 5-gallon bucket

Module 5: Remote Control Panel
An anodized aluminum panel with the following system controls:
One hour meter (Standard)
One 0-1 GPM flow meter
One 0-1500 system pressure gauge
One product water selector non-blocking 3-way valve
One stainless steel pressure regulating needle valve One 12VDC boost pump electrical switch
One 120VAC high pressure pump electrical switch One boost Pump pressure gauge
One 5ft 3/8″ high pressure braided stainless steel silicon coated hose (Longer hose available upon request for an additional charge)

Module 5: Optional Remote-Control Panel with TDS Meter
Replaces standard hour meter with on-panel real-time TDS meter display ($200 adder)

Miscellaneous Included Equipment & Supplies:
30ft of green 1/2″ Polyethylene sea water tubing 30ft of blue 1/4″ Polyethylene product water tubing 40ft of red 1/4″ Polyethylene brine water tubing
10ft of Orange 3/8″ Polyethylene pickling water tubing One cutter for the water tubing
Locking clips for all push connector fittings
Electronic copy of the Installation, Operation and Maintenance manual on USB Stick (hard copy manual available on request at our cost of $23)
One filter housing wrench for filter element replacement
One container of high-pressure pump oil
2.5 pounds of pickling reagent
One hand-held TDS meter for checking water quality (not included with control panel mount TDS meter)
A baggy of assorted push-to-connect fittings to aid in installation

What we Don’t Provide. In other words, what you will need to supply:
We made a YouTube Video going over the details and you can watch that
here: YouTube Video Link

In summary:
Raw water through hull and shutoff valve
Raw water sea strainer (we recommend one like this)
Electrical installation wire and breakers for the AC and DC Pumps
Mounting screws and bolts for the individual system Modules
Zip ties and mounting straps for securing the electrical and water lines
That’s it! Everything else we provide with the with the water maker.

Water Maker Module Sizes:
The below table provides the length, width, height, and weight of the various water maker modules. The listed dimensions represent the greatest size measurement to create a box that the module can be contained within. However, as can be seen in the module photo images, the modules could actually fit into a smaller space depending upon the installation orientation. These dimensions do not include the room needed for wires or hoses to enter or exit the equipment. All equipment comes with straight fittings. Optional 90-degree fittings are available.

1: Pump and Motor189848
2: RO Pressure Vessel4510630.5
3: Prefilter Assembly13.759.7555.2
3: 12V DC Boost Pump9.5577
4: Valving and Cleaning Assembly13.5514.55
5: Remote Control Panel
Depth protruding from back of panel

Remote Control Panel (Hour Meter)
Depth protruding from back of panel




Automatic Fresh Water Flush ($695)
Valving & Cleaning Panel ($350)

* Please notify us if you plan a 220VAC installation so we can change the standard 120VAC electrical switch for the high-pressure pump motor in your remote panel.
*Please notify us if you plan a 24VDC installation so we can change the standard 12VDC electrical switch for your boost pump in your remote panel.
* Standard Boost pump is a 12VDC self-priming pump.
(Here is a link to a Video we made explaining why we like the 12V DC pump)
* A 120VAC Boost pump option available using 1.5Amp $200 Adder.
* A 24VDC Boost pump is available using 6.5Amp $200 Adder.