Seawater Desalination Systems

Desalination Machines: SWRO Systems & Marine Watermakers, 200 GPD–1M GPD

A desalination machine converts seawater or brackish water into potable freshwater using reverse-osmosis membranes. ForeverPure manufactures the full range — from 200 GPD marine watermakers to 1,000,000+ GPD industrial SWRO plants — in our Silicon Valley, California facility. Every desalination machine ships with Danfoss APP high-pressure pumps, LG NanoH2O or Toray membranes, and full PLC controls. Over 8,000 systems shipped worldwide since 1997.

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What Is a Desalination Machine?

A desalination machine is an integrated system that removes dissolved salts and contaminants from seawater or brackish water by forcing the feed water under pressure through a semi-permeable membrane. The clean output (permeate) is potable; the rejected brine is discharged. Modern desalination machines integrate pretreatment filtration, high-pressure pumping, RO membrane vessels, and energy recovery into a single skid — turnkey on delivery, ready to commission.

Portable Desalination Machines & Marine Watermakers (200–5,000 GPD)

Our compact portable desalination machines and marine watermakers range from 200 GPD to 5,000 GPD — ideal for sailboat watermakers, yacht freshwater supply, coastal homes, and emergency water purification. These lightweight, 12V-compatible units deliver reliable freshwater anywhere, with easy installation and minimal maintenance. Every portable desalination machine uses Danfoss APP high-pressure pumps with super-duplex stainless steel construction and ceramic-coated pistons for maximum corrosion resistance.

Commercial Desalination Machines (5,000–50,000 GPD)

ForeverPure commercial desalination machines from 5,000 GPD to 50,000 GPD serve resorts, hotels, municipalities, hospitals, schools, and agricultural operations. Each system is custom-engineered with LG NanoH2O or Toray membranes (>99.7% salt rejection), Codeline FRP pressure vessels rated to 1,000 psi, and Danfoss APP high-pressure pumps with VFD compatibility for optimal energy savings.

Industrial Desalination Machines & SWRO Plants (50,000–1,000,000+ GPD)

Our industrial seawater desalination plants from 50,000 GPD to over 1,000,000 GPD feature ERI PX pressure exchangers or FEDCO HPB turbochargers that reduce power consumption below 2.5 kWh per cubic meter — significantly below the industry average of 3–4 kWh/m³. All large-scale desalination machines include Siemens or Allen-Bradley PLC automation with touchscreen HMI and cloud-based VPN remote monitoring, 316L stainless steel high-pressure piping, and integrated pre-treatment.

What's Inside Every ForeverPure Desalination Machine

Membranes: LG NanoH2O or Toray TFC — >99.7% salt rejection
High-Pressure Pumps: Danfoss APP series — super-duplex stainless, ceramic-coated pistons
Energy Recovery: ERI PX pressure exchangers or FEDCO HPB turbochargers
Pressure Vessels: Codeline FRP — rated to 1,000 psi
Motors: WEG IE3/NEMA Premium efficiency
Controls: Siemens or Allen-Bradley PLC with touchscreen HMI
Piping: 316L or duplex/super-duplex stainless

Every desalination machine is available in open-frame and containerized (turnkey) configurations, powered by solar, wind, or conventional generators for off-grid and remote installations.

Applications for Desalination Machines

Island resorts and hotels, coastal municipalities, marine vessels, emergency and disaster relief, agricultural irrigation, industrial process water, real estate developments, hospitals, schools, and remote camps without grid water.

Desalination Machine Buyer's Resources

Desalination Machine Buyer's Guide — complete sizing methodology and vendor comparison
Danfoss APP Pumps Reference — pump selection for every machine size
ERI PX Energy Recovery Guide — cut energy use 50%+
Water Treatment Glossary — 30 essential terms explained

Frequently Asked Questions About Desalination Machines

What is a desalination machine?

A desalination machine is an integrated system that converts seawater or brackish water into potable freshwater using reverse osmosis (RO) membranes. Commercial desalination machines combine a high-pressure pump, semi-permeable membranes, pretreatment filters, and energy-recovery devices into a single skid or containerized unit, with capacities from 200 GPD (small marine watermakers) to over 1,000,000 GPD (municipal-scale plants).

How much does a desalination machine cost?

Desalination machine prices range from approximately $4,500 for a 200 GPD marine watermaker to $25,000–$80,000 for 1,000–10,000 GPD commercial units, and $500,000+ for industrial-scale SWRO plants above 100,000 GPD. Total cost depends on capacity, automation level, energy recovery, and post-treatment requirements. ForeverPure provides free engineering quotes within 24 hours.

What is the best desalination machine for home or residential use?

For residential or off-grid coastal use, the 200–500 GPD ForeverPure watermaker series is the most popular choice. These compact desalination machines run on 12V/24V DC or 110V/230V AC, install in under a day, and produce 200–500 gallons of potable water per day from any seawater source.

How long does a desalination machine last?

A properly maintained commercial desalination machine runs 15–20 years overall. Membranes are replaced every 3–7 years, high-pressure pump seals every 8,000–12,000 hours, and cartridge prefilters every 1–3 months. ForeverPure systems use Danfoss APP pumps rated for 50,000+ operating hours.

Can a desalination machine purify any type of water?

Yes — ForeverPure desalination machines handle seawater (SWRO, up to 45,000 ppm TDS), brackish water (BWRO, 1,000–15,000 ppm TDS), and high-recovery industrial water. We configure pretreatment (multimedia filtration, ultrafiltration, antiscalant) based on your specific feed-water chemistry.

What is the difference between a desalination machine and a watermaker?

A "watermaker" is industry shorthand for a small, packaged desalination machine designed for marine, yacht, or off-grid use — typically 35–5,000 GPD. "Desalination machine" or "desalination plant" generally refers to larger commercial or industrial systems (5,000 GPD and up). Both use the same core technology: reverse osmosis through a semi-permeable membrane.

Are ForeverPure desalination machines made in the USA?

Yes — ForeverPure designs and manufactures every desalination machine in our Silicon Valley, California facility. We have shipped over 8,000 SWRO systems worldwide since 1997.

What components are inside a desalination machine?

A complete desalination machine includes: feed pump, pretreatment (multimedia or cartridge filtration, antiscalant dosing), high-pressure pump (Danfoss APP axial piston or Grundfos BME multistage centrifugal), RO membrane elements in FRP pressure vessels, energy recovery device (ERI PX pressure exchanger or FEDCO HPB turbocharger), pressure controls, conductivity sensors, and a PLC with touchscreen HMI.

Get a Free Desalination Machine Quote

Need help selecting the right desalination machine for your project? Our engineers will design a custom solution matched to your water quality, capacity, and site requirements. Contact us today for a free consultation and quote — call +1-408-969-2688 or email sales@ForeverPurePlace.com.