Shurflo Water Pump 12V 100 PSI Male Ports

Shurflo 8000-946-138 12V 100 PSI Window-Cleaning Pump

The Shurflo 8000-946-138 is a reliable 12V diaphragm pump designed for water-fed pole and pure-water window-cleaning systems. It delivers pressure up to 100 PSI with an open-flow rate of approximately 5.2 litres per minute, making it suitable for van-mounted and trolley-based systems.

Its self-priming design, compact construction and efficient power consumption make it a dependable choice for professional window cleaners working with long hose runs and high-reach water-fed poles.

IMPORTANT: THIS LISTING IS FOR THE PUMP ONLY. NO STRAINER, FITTINGS, CONTROLLER, HOSES, WIRING ACCESSORIES OR OTHER ACCESSORIES ARE INCLUDED.

Reliable 100 PSI Performance

The pump provides the pressure required to move pure water through long lengths of microbore hose and up water-fed poles. Actual pressure and flow at the brush head will vary depending on the hose length, pole height, controller settings, battery condition and system configuration.

The diaphragm design allows the pump to self-prime and run dry without immediate damage. However, regularly running the pump without water should be avoided wherever possible.

Key Benefits

Technical Specifications

Suitable Applications

• Water-fed pole window cleaning: Supplies pure water from van-mounted or trolley-based tanks to water-fed brushes.

• Commercial exterior cleaning: Suitable for cleaning windows and building façades where mains water pressure is unavailable.

• Mobile pure-water systems: Ideal for professional systems powered by a suitable 12V leisure battery.

• Replacement pump installations: Suitable for replacing a compatible 12V, 100 PSI pump with matching connections and electrical requirements.

Why Professionals Choose Shurflo

Shurflo pumps are widely used in professional window-cleaning systems because of their dependable diaphragm technology, compact design and ability to provide consistent pressure.

The 8000-946-138 offers a practical balance of pressure, water flow and power consumption for everyday water-fed pole work. When installed with a suitable strainer, fuse and correctly calibrated flow controller, it can provide reliable service in demanding mobile cleaning systems.

Installation, Safety and Maintenance

• Protect the pump from frost: Drain the pump and connected pipework during freezing weather. Water expanding inside the pump can crack the housing and cause permanent damage.

• Keep the motor and electrical connections dry: Mount the pump where it is protected from rain, leaks and water spills.

• Install an inlet strainer: A suitable strainer must be fitted before the pump inlet to prevent resin, dirt and other debris from entering the pump head.

• Use a suitable fuse: Install an appropriately rated inline fuse on the positive electrical connection.

• Use a flow controller: A correctly calibrated digital controller regulates the water flow, reduces unnecessary battery use and prevents repeated pressure-switch cycling.

• Check all connections: Make sure the inlet and outlet fittings are properly fitted without overtightening or damaging the pump ports.

• Do not dismantle the motor: Internal repairs should only be completed by a suitably qualified person.

Warranty Information

The Shurflo 12V pump is supplied with a limited warranty.

The warranty does not cover damage caused by:

• Freezing or ice expansion inside the pump.

• Water entering the motor or electrical components.

• Resin, dirt or other debris entering the pump.

• Incorrect wiring, unsuitable power supplies or electrical short circuits.

• Improper installation, misuse or unauthorised modifications.

• Operating the pump outside its intended specifications.

• Using an incorrectly calibrated controller.

When used as part of a water-fed pole system, the pump should be connected to a suitable flow controller that has been correctly installed and calibrated.

Installation Directions

1. Fit an inlet strainer: Attach a compatible 1/2-inch strainer to the inlet side before connecting the water supply. This protects the pump from resin and tank debris.

2. Fit the required connections: Attach compatible 1/2-inch female fittings to the inlet and outlet ports. Do not overtighten them.

3. Install an inline fuse: Fit a suitable fuse to the positive power cable to protect the pump and wiring from excessive current.

4. Connect a flow controller: Wire the pump through a compatible digital flow controller according to the controller manufacturer’s instructions.

5. Check the water supply: Make sure the tank contains sufficient water and that all valves between the tank and pump are open.

6. Bleed the system: Switch on the pump and allow water to run freely until any trapped air has cleared and the flow becomes steady.

7. Calibrate the controller: Adjust the flow and calibration settings to match the hose, pole and brush configuration.

Frequently Asked Questions

Q: Are fittings and a strainer included with this pump?

A: No. This listing is for the pump only. Strainers, fittings, controllers, hoses, wiring accessories and all other accessories must be purchased separately.

Q: What fittings are required?

A: The pump has 1/2-inch male threaded ports. Compatible 1/2-inch female Shurflo fittings are available in straight and elbow configurations. Check compatibility before ordering.

Q: Is this pump suitable for a water-fed pole system?

A: Yes. It is commonly used in single-operator pure-water window-cleaning systems, including van-mounted and trolley-based installations.

Q: Can the pump be connected directly to a battery?

A: The pump can operate from a suitable 12V power supply, but a correctly calibrated digital flow controller is strongly recommended for water-fed pole use. A controller regulates flow, reduces water consumption and limits unnecessary pressure-switch cycling.

Q: Why is the pump pulsing?

A: Pulsing usually means the pressure switch is repeatedly activating. This may be caused by an incorrectly calibrated controller, restricted water flow, a kinked hose, blocked jets or another obstruction in the outlet line.

Q: Why has the pump stopped building pressure?

A: Common causes include an empty tank, an airlock, a blocked inlet strainer, a restricted hose, low battery voltage or debris trapped inside the pump head.

Q: What battery should be used?

A: A deep-cycle leisure battery is normally used. The required capacity depends on the working time, controller setting, pump load, battery condition and any other equipment connected to the battery.

Q: Can the pump be used with hot pure water?

A: Only use the pump within the manufacturer’s permitted fluid-temperature range. Do not connect it to an unregulated hot-water supply.

Expert Tip: Correct controller calibration is essential. A setting that is too high or poorly calibrated can cause pressure-switch cycling, unnecessary battery use and increased wear. Do not bypass or modify the internal pressure switch unless this is specifically authorised by the manufacturer.