Water Maker Comparison

At A Glance

Rainman offers three main power sources for our watermakers. AC electric, petrol (gasoline), and 12VDC electric. This table compares the specifications between the various options. Keep in mind there are different options for reverse osmosis (RO) units, so the fresh product water output depends on which one you choose.

AC ElectricPetrol (Gasoline) 12VDC Electric
Product Water Output Expectations
RO – High Output
(2 x Filmtec SW30-2540)
100 – 140 lph
26 – 37 gph
100 – 140 lph
26 – 37 gph
Not Available
RO – Compact
(2 x Filmtec SW30-2521)
50 – 70 lph
13 – 18 gph
50 – 70 lph
13 – 18 gph
Not Available
RO – Economy
(1 x Filmtec SW30-2540)
50 – 70 lph
13 – 18 gph
50 – 70 lph
13 – 18 gph
26 – 34 lph
7 – 9 gph
System Specifications
Configuration OptionsCase or NakedCase onlyCase or Naked
AutoflushOptionalNot AvailableOptional
Power Source230VAC / 50Hz
115VAC / 60Hz
Petrol (Gasoline)12V DC
Power Use1,250 Watts700ml Fuel / 70 Minutes410 Watts
Current Draw6 Amps (230V)
12 Amps (115V)
nil32 Amps
Motor Type1.5HP TEFC inductionHonda GXH50 (4 stroke)Permanent magnet TEFC DC
Plug TypeUSA – NEMA 5-15
Europe – CEE 7/7
Australia – AS/NZS 3112
UK – BS 1363
n/aAnderson style
Power Cord Length3 metres (10 ft)n/a1.4 metres (4.5 ft)
including battery connectors
Subjective Sound LevelLoud humSlightly quieter than
Honda 2kVA generator
(under max load)
Soft hum
Measured Sound Level
  6 Metres in Open Lot
62dB73dB58dB
Integrated Lift PumpFlexible impellerFlexible impellerFlexible impeller
High Pressure PumpGeneral Pump WMR SeriesGeneral Pump WM SeriesGeneral Pump WMR Series
Operating Pressure55 bar (800 psi)55 bar (800 psi)55 bar (800 psi)
Pressure Relief ValveInterpump 316SS/CeramicInterpump 316SS/CeramicInterpump 316SS/Ceramic
PrefilterSingle 5 micron pleatedSingle 5 micron pleatedSingle 5 micron pleated
Permeate Flow Meter0 – 150 lph (40 gph) variable aperture0 – 150 lph (40 gph) variable aperture0 – 40 lph (11 gph) variable aperture
Intake Hose Length5 metres (16 ft)5 metres (16 ft)3 metres (10 ft)
Vertical Water Lift2 metres (6 ft)2 metres (6 ft)2 metres (6 ft)

At A Glance – AC v Petrol (Gasoline)

Rainman offers three main power sources for our watermakers. AC electric, petrol (gasoline), and 12VDC electric. This table compares the specifications between the AC Electric and petrol (gasoline) Rainman systems. Keep in mind there are different options for reverse osmosis (RO) units, so the fresh product water output depends on which one you choose.

Change Comparison View

AC ElectricPetrol (Gasoline)
Product Water Output Expectations
RO – High Output
(2 x Filmtec SW30-2540)
100 – 140 lph
26 – 37 gph
100 – 140 lph
26 – 37 gph
RO – Compact
(2 x Filmtec SW30-2521)
50 – 70 lph
13 – 18 gph
50 – 70 lph
13 – 18 gph
RO – Economy
(1 x Filmtec SW30-2540)
50 – 70 lph
13 – 18 gph
50 – 70 lph
13 – 18 gph
System Specifications
Configuration OptionsCase or NakedCase only
AutoflushOptionalNot Available
Power Source230VAC / 50Hz
115VAC / 60Hz
Petrol (Gasoline)
Power Use1,250 Watts700ml Fuel / 70 Minutes
Current Draw6 Amps (230V)
12 Amps (115V)
nil
Motor Type1.5HP TEFC inductionHonda GXH50 (4 stroke)
Plug TypeUSA – NEMA 5-15
Europe – CEE 7/7
Australia – AS/NZS 3112
UK – BS 1363
n/a
Power Cord Length3 metres (10 ft)n/a
Subjective Sound LevelLoud humSlightly quieter than
Honda 2kVA generator
(under max load)
Measured Sound Level  6 Metres in Open Lot62dB73dB
Integrated Lift PumpFlexible impellerFlexible impeller
High Pressure PumpGeneral Pump WMR SeriesGeneral Pump WM Series
Operating Pressure55 bar (800 psi)55 bar (800 psi)
Pressure Relief ValveInterpump 316SS/CeramicInterpump 316SS/Ceramic
PrefilterSingle 5 micron pleatedSingle 5 micron pleated
Permeate Flow Meter0 – 150 lph (40 gph) variable aperture0 – 150 lph (40 gph) variable aperture
Intake Hose Length5 metres (16 ft)5 metres (16 ft)
Vertical Water Lift2 metres (6 ft)2 metres (6 ft)

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