Introduction
This manual provides essential instructions for the safe operation, assembly, maintenance, and troubleshooting of your Commowner CM38000313 Electric Pressure Washer. Please read this manual thoroughly before using the product to ensure safe and efficient operation.
The Commowner CM38000313 electric pressure washer is designed to deliver powerful cleaning for various outdoor surfaces, including homes, cars, and patios. It features a 4800 PSI maximum pressure and a 2.8 GPM maximum flow rate, making it suitable for a wide range of cleaning tasks.
Important Safety Instructions
WARNING: When using this product, basic precautions should always be followed to reduce the risk of fire, electric shock, and personal injury, including the following:
- Read all instructions before using the appliance.
- To reduce the risk of injury, close supervision is necessary when an appliance is used near children.
- Know how to stop the unit and bleed pressures quickly. Be thoroughly familiar with the controls.
- Stay alert – watch what you are doing. Do not operate the appliance when fatigued or under the influence of alcohol or drugs.
- Keep the operating area clear of all persons.
- Do not overreach or stand on unstable support. Keep good footing and balance at all times.
- Follow the maintenance instructions specified in this manual.
- This product is equipped with a Total Stop System (TSS) that automatically stops the pump when the trigger is not engaged, conserving energy and maintaining the integrity of your pressure washer.
- Always ensure the spray gun's safety lock is engaged when not in use to prevent accidental discharge.
Figure 1: Safety Features Overview. This image highlights key safety elements such as IPX5 water resistance, the Total Stop System, and the spray gun safety lock.
Package Contents
Verify that all items listed below are included in your package. If any parts are missing or damaged, please contact customer service immediately.
- Commowner Electric Pressure Washer Unit
- 33ft High-Pressure Hose
- Detergent Tank (Foam Cannon)
- Garden Hose Adapter
- 4 Quick-Connect Nozzles (0°, 15°, 25°, 40°)
- Cleaning Pin
- User Manual (Welcome Guide)
Figure 2: Overview of Pressure Washer Components. This diagram illustrates the main parts of the pressure washer and their locations, such as the handle, hose connections, and storage areas.
Assembly and Setup
Follow these steps to assemble and prepare your pressure washer for use:
- Attach the Handle: Securely attach the liftable handle to the main unit. Ensure it clicks into place or is fastened according to the unit's design.
- Connect the High-Pressure Hose: Connect one end of the 33ft high-pressure hose to the pressure washer's high-pressure outlet and the other end to the spray gun. Hand-tighten all connections firmly to prevent leaks.
- Connect the Water Supply: Attach a standard garden hose (not included) to the garden adapter on the pressure washer's water inlet. Ensure the water supply is turned on fully before starting the unit.
- Connect Power: Plug the 20ft power cord into a grounded electrical outlet. Ensure the outlet is suitable for the pressure washer's power requirements.
- Purge Air from System: Before starting the motor, squeeze the trigger on the spray gun for approximately 30 seconds to allow water to flow through the pump and hose, expelling any trapped air. This crucial step prevents damage to the pump.
Figure 3: Connecting the Water Supply. This image demonstrates how to properly connect a standard garden hose to the pressure washer's inlet.
Operating Instructions
Starting the Pressure Washer
- Ensure all connections are secure and the water supply is fully open.
- Ensure air is purged from the system by squeezing the trigger until a steady stream of water emerges.
- Turn on the power switch located on the pressure washer unit.
- Disengage the safety lock on the spray gun.
- Squeeze the trigger to begin spraying. The Total Stop System (TSS) will automatically stop the pump when the trigger is released and restart it when squeezed again.
Using Quick-Connect Nozzles
The pressure washer includes 4 quick-connect nozzles for various cleaning tasks. To change a nozzle:
- Turn off the pressure washer and engage the safety lock on the spray gun.
- Pull back the collar on the quick-connect fitting at the end of the spray gun wand.
- Insert the desired nozzle until it clicks into place.
- Release the collar to secure the nozzle.
- Gently tug on the nozzle to ensure it is firmly seated before restarting the unit.
Figure 4: Quick-Connect Nozzle Guide. This image displays the different nozzle types and their recommended applications, along with instructions for attaching them.
Nozzle Applications:
- 0° (Red) Nozzle: Delivers a concentrated, high-pressure stream for dissolving stubborn substances and caked stains in cracks. Use with extreme caution and only on appropriate surfaces.
- 15° (Yellow) Nozzle: Provides a high-pressure, narrow fan spray for intensive cleaning of hard surfaces like concrete and brick.
- 25° (Green) Nozzle: Offers a medium-pressure, wider fan spray suitable for general cleaning of wood decks, siding, and other soft surfaces.
- 40° (White) Nozzle: Produces a low-pressure, wide fan spray ideal for delicate surfaces such as windows, screens, and light cleaning tasks.
Using the Foam Cannon (Detergent Tank)
- Fill the detergent tank with an appropriate pressure washer-safe cleaning solution. Do not use harsh chemicals that could damage the unit.
- Attach the foam cannon to the spray gun using the quick-connect fitting.
- Ensure the pressure washer is running and the water supply is on.
- Squeeze the trigger to apply foam.
- After applying detergent, remove the foam cannon and reattach a rinsing nozzle (e.g., 25° or 40°) to rinse the surface thoroughly.
Figure 5: Applying Detergent with Foam Cannon. This image shows the pressure washer in use with the foam cannon attachment for car washing.
Maintenance
After Each Use
- Turn Off Water Supply: Shut off the water faucet connected to the pressure washer.
- Relieve Pressure: Squeeze the spray gun trigger to release any remaining water pressure in the system.
- Turn Off Power: Switch off the pressure washer unit and unplug the power cord from the electrical outlet.
- Disconnect Hoses: Disconnect the garden hose from the inlet and the high-pressure hose from both the unit and the spray gun.
- Drain Water: Drain all water from the pump, hoses, and spray gun to prevent freezing and damage, especially in cold climates.
- Clean Nozzles: Use the included cleaning pin to clear any blockages from the nozzle tips. Rinse the foam cannon if used.
Storage
Store the pressure washer in a dry, frost-free environment. Ensure all water is drained from the unit before storing to prevent damage from freezing. Utilize the integrated storage features for nozzles, hose, and power cord to keep components organized and protected.
Figure 6: Compact Storage. This image illustrates how the pressure washer can be stored efficiently due to its integrated design, saving space.
Troubleshooting
Refer to the table below for common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Motor does not start | Power cord not plugged in; No power at outlet; Thermal overload activated | Check power connection; Test outlet with another appliance; Allow unit to cool down for 30 minutes |
| Low pressure | Insufficient water supply; Clogged nozzle; Air in pump | Ensure water faucet is fully open; Clean nozzle with cleaning pin; Purge air from system (see Assembly & Setup) |
| Water leaks | Loose connections; Damaged O-rings | Tighten all connections; Replace damaged O-rings if necessary |
| Pulsating pressure | Air in pump; Clogged inlet filter; Kinked garden hose | Purge air from system; Clean inlet filter; Straighten garden hose |
| Detergent not siphoning | Detergent tank empty; Foam cannon not properly attached | Fill detergent tank; Ensure foam cannon is securely attached |
| Unit shuts off during operation | Total Stop System (TSS) engaged; Overheating | This is normal operation when trigger is released; Allow unit to cool if used continuously for extended periods |
| Spray gun safety lock not working | Lock mechanism jammed or damaged | Inspect for debris and clear; Contact customer service if damaged |
| Abnormal noise | Air in pump; Loose parts | Purge air from system; Check for loose components and tighten |
Specifications
Detailed technical specifications for your Commowner CM38000313 Electric Pressure Washer:
| Feature | Detail |
|---|---|
| Model Number | CM38000313 |
| Maximum Pressure | 4800 PSI |
| Maximum Flow Rate | 2.8 Gallons Per Minute (GPM) |
| Power Source | AC Electric |
| High-Pressure Hose Length | 33 Feet |
| Power Cord Length | 20 Feet |
| Product Dimensions (L x W x H) | 53.3L x 30.5W x 30.5H Centimetres |
| Item Weight | 9.03 kg |
| Water Protection Rating | IPX5 Water Proof |
| Special Features | Total Stop System (TSS), Safety Lock, Integrated Storage |
| Nozzle Types | 0°, 15°, 25°, 40° Quick-Connect, Foam Cannon |
| Manufacturer | commowner |
| First Available | March 27, 2025 |
| Note on Pressure Rating | The machine's pressure rating is the maximum value obtained through testing in a controlled laboratory environment without external influencing factors. Actual use may vary based on faucet, hose length, and nozzle type. |
Warranty and Customer Support
Your Commowner electric pressure washer machine is backed by a 1-Year Warranty from the date of purchase. We also offer a 30-day risk-free exchange and replacement policy.
For assistance with defective units, technical support, or any other inquiries, please reach our customer service:
Email: support@electricpressurewasher.online
Please have your model number (CM38000313) and purchase date ready when contacting support to expedite service.