Catalog Pg. 64

DC Water Pumping

12V or 24V

DC Water Pumping

If you have a shallow well or spring that is not too far from your home and have a small PV system without an inverter, then use a 12 volt or 24 volt DC pump. A DC suction pump can lift water from a depth of 12 to 16 feet maximum and pressurize a system, although at a slower rate than an AC pump. A DC submersible pump can be set as deep as 230' but will have only 1 to 2 gpm output. DC pumps can also be used effectively to pressurize an existing gravity flow system. The best part about DC pumps is the low amount of power needed per gallon of water pumped.

SHURflo DC Water Pumps

Shurflo water pumps are diaphragm pumps. They can run dry and not harm themselves. They do not need a filter, only an intake strainer. Because these pumps come out of the industrial sector, they are mass produced and less expensive than other DC pumps. They will draw water up vertically about 12 feet. They have an internal check valve and a pressure switch that will turn the pump on at about 28 PSI and off at 40 PSI. For a pressurized system a foot valve is required on the pipe at the bottom of the well to maintain prime. The addition of an expansion tank allows the system to be more efficient and easier on the pump. Shurflo pumps should last about 3 to 5 years in a PV home. They come with a one year warranty. The pump head is easily replaced if a problem should occur.

SHURflo 144 12VDC Pump

922-144A SHURflo 144 12V $89

12 volts, 3 GPM, 6-8 amps draw

This pump is a lighter duty pump than the 145. It will turn on at 28 PSI and off at 40 PSI. It is usually used without a pressure tank, coming on when the faucet is on and shutting off when the faucet is turned off. Good for occasional use in cabins or where the water system is not in daily use. One year warranty.

SHURflo 144 24VDC Pump

922-144B SHURflo 144 24V $139

24 volts, 3 GPM, 3-5 amps draw

The 144 is the 24 volt equivalent to the 12V 144. Same pump head but with a somewhat lighter duty motor without the heat sink.

SHURflo 145 12VDC Pump

922-145 SHURflo 145 $189

12 volts, 4.5A open-flow to 9A @ 45psi

3.6 gpm open-flow to 2 gpm @45psi

The 145 pump is the work-horse of the Shurflo line. This is the pump to use for a full home system if your well is suitable, or for pressurizing gravity feed systems. Maximum inlet pressure is 30 psi. It includes an integrated pressure switch and check valve. The pressure switch is preset to turn off at 45 psi and turn back on at 25 psi. The 145 has a heavy duty DC motor, now manufactured by SHURflo, with a heavy duty cooling heat sink. This pump should last 5 years under daily use. Even then it is likely that only the pump head will need replacing. It has a one year warranty.

NEW!

SHURflo Smart Sensor Pump Shurflo Smart Sensor (DSCN1373)

922-012 Smart Sensor Pump $249

12 Volts, 5 GPM, 10 Amps

922-024 Smart Sensor Pump $279

24 Volts, 5.5 GPM, 5 Amps

The name "Smart Sensor" derives from the fact that the pump has the ability to smoothly deliver the amount of water required, up to 5 gpm, without the need for a pressure tank. In fact, SHURflo insists that you not use a pressure tank with this pump. This diaphragm pump has five chambers and is capable of self-priming from a distance of 6 feet vertically. The Model 254 strainer is strongly recommended on the input side of the pump. Do not use a water filter on the input side. Consider purchasing our installation kit for this pump. See page 69.

NOTE: All the pumps on this page require special input and output fittings. SHURflo recommends that flexible tubing be used on the input and output sides of these pumps as well. Please consider our installation kits on pages 69 and 70 for use with these pumps

Note: DC water pumping is continued on the next web page.

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