Peter Nunn wrote:

You might be interested in this site as well
http://www.daviescraig.com.au/newproduct.html

                                                     
          Part Number: 8005
      Technical Specifications:
 Operating Voltage 4V DC to 14.5V DC
           Maximum Current 7.5A 
Flowrate  20L to 80L/min, (300 gal to 1300 gal/hr) 13.5V DC
Operating Temperature -20C to 130C (-5 F to 270 F)
Pump Design Clockwise centrifugal with volute chamber
Motor Life 2000 hrs continuous at 80 C (180 F) and 12V DC
Pump Weight 900 grams (2 lb)
Pump Material Nylon 66, 30% glass filled
Maximum Pressure tested to 50 psi
Fits Hoses Sizes 32mm to 50mm (1-1/4" to 2")

Now with this pump the numbers make sense.

300 gal per hour divided by 60 is 5 gallons per minute.
13.5 volts 7.5 amps or 100 watts .13
HP.                                                               

Makes sense to me.

Of course we need 35 gallons per minute or seven times that flow.
Scaling things a bit 7 * 7.5 Amps = 52 amps or 708 watts or nearly one HP
for 35 GPM.

If you scale the weight you get a 14 pound pump which
is also about right for 35 gallons per minute electric pump.

The temp specs are marginal.

The numbers add up here and the laws of physics are obeyed.

Paul Lamar
 
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