The Craftsman Portable 1/2 H.P. Utility/Sprinkler Pump, Model No. 390.260293, is designed for pumping clean water from sources like lakes, streams, and ponds, and for boosting city water pressure for sprinkler applications. It is a non-submersible, corrosion-resistant pump intended for continuous duty.
Function Description:
This pump serves two primary functions:
- Pumping from Lakes, Streams, and Ponds: It can draw water from natural sources for various utility purposes. For this application, it requires a reinforced suction hose with a foot valve and strainer to prevent debris from entering the pump.
- Boosting City Water Pressure: It can be connected to a household faucet to increase water pressure for operating sprinklers, capable of supplying up to three sprinklers depending on their GPM output. When used as a booster pump, it's crucial to use a reinforced high-pressure hose or pipe for the discharge line and install appropriate adapters.
Important Technical Specifications:
- Model Number: 390.260293
- Horsepower: 1/2 H.P.
- Power Supply: 115 Volt, 60 Cycle outlet. It is equipped with a 3-wire, grounded cord and plug and must be connected to a properly grounded, GFCI-protected outlet.
- Ports: Both suction and discharge ports are tapped for 1" NPT (National Pipe Thread) threads. Hose adapters are required for hose connections.
- Suction Lift: Maximum recommended suction lift is 20 feet (6.1M).
- Performance Chart (Flow in Gallons Per Minute at various Discharge Pressures and Suction Lifts):
- 0' Suction Lift: 10.2 GPM at 5 PSI, down to 4.2 GPM at 40 PSI.
- 5' Suction Lift: 9.9 GPM at 5 PSI, down to 3.8 GPM at 40 PSI.
- 10' Suction Lift: 7.9 GPM at 5 PSI, down to 3.0 GPM at 40 PSI.
- 15' Suction Lift: 6.5 GPM at 5 PSI, down to 2.5 GPM at 40 PSI.
- 20' Suction Lift: 4.8 GPM at 5 PSI, down to 2.2 GPM at 40 PSI.
- Motor: Features an auto-reset thermal overload to prevent damage from overheating.
- Seal: Water-cooled and self-lubricating shaft seal.
- Capacitor: 30 microfarad.
Usage Features:
- Installation:
- Locate the pump as close as possible to the water source to minimize suction lift.
- Place the pump on a level support and protect it from excessive moisture and flooding.
- Use the smallest possible number of fittings and the shortest possible pipe run to reduce friction and improve flow.
- Ensure all hose and pipe connections in the suction line are tight to prevent air leaks, which can hinder priming and reduce performance.
- Use only Teflon tape or Plasto-Joint-Stik to seal threads on pump ports; avoid pipe joint compounds.
- Tighten piping joints hand tight +1-1/2 turns only to prevent damage.
- Priming:
- Before starting, fill the pump body through the priming port.
- The pump should prime and start pumping water within 10 minutes.
- Safety Precautions:
- NEVER RUN PUMP DRY: This can damage internal parts, overheat the pump, and void the warranty. Always have the suction strainer installed when operating.
- Electrical Safety: Always connect to a properly grounded, GFCI-protected outlet. Do not handle the pump with wet hands or while standing on wet/damp surfaces. Unplug before servicing.
- Hazardous Pressure: When used as a booster pump, a relief valve capable of passing full pump flow at 75 PSI (517 kPa) must be installed to prevent explosion. Do not shut off the hose or sprinklers while the pump is running, as this can cause the hose or sprinkler head to explode.
- Explosion Hazard: Never run the pump with the outlet shut off or blocked, as trapped water can turn to steam and lead to explosion and burns.
- Flammable Liquids: Do not pump gasoline or other flammable liquids, and do not use in atmospheres containing flammable fumes or vapors.
- Corrosive Liquids: Do not pump chemicals or corrosive liquids.
- Non-Submersible: Keep the motor dry at all times; do not wash, immerse, or expose to wet weather.
- Salt Water/Brine: This unit is not designed for applications involving salt water or brine, as it will void the warranty.
Maintenance Features:
- Strainer Cleaning: Inspect and clean the foot valve with strainer frequently, especially when pumping from lakes, streams, or ponds, to prevent clogging and maintain performance.
- Flushing: Clean the strainer and flush out the pump after each use.
- Lubrication: The motor is factory-lubricated for the life of its bearings. The pump seal is water-cooled and self-lubricating, requiring no external lubrication.
- Troubleshooting Overload: If the motor's thermal overload trips repeatedly, check for causes such as low voltage or a clogged impeller.
- Seal Replacement: Detailed instructions and diagrams are provided for pump disassembly and seal replacement. When replacing the seal, ensure it is not scratched, nicked, or cracked, and that the pump shaft is not scratched or gouged.
- Capacitor Replacement: Instructions are provided for safely discharging and replacing the capacitor.
- Shroud Replacement: Instructions include ensuring the green ground wire is solidly connected to the grounding terminal before reinstalling the shroud.
- Reassembly: During reassembly, ensure the impeller does not bind on the diffuser and that the shaft and impeller are clear of the diffuser before tightening pump body bolts.
Warranty:
The Craftsman Portable 1/2-HP Utility/Sprinkler Pump comes with a full one-year warranty from the date of purchase, covering repair or replacement free of charge if defective in material or workmanship. The warranty explicitly states that Sears will not be liable for loss or damage to property or any incidental or consequential loss or expense from property damage due directly or indirectly from the use of this product. This warranty applies only in the United States.
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