1. Introduction
This manual provides instructions for the safe operation and maintenance of your ECOWELL Stanley SL18910P-3 3 Gallon Portable Wet/Dry Shop Vacuum. Please read all instructions carefully before using the product to ensure proper function and to prevent injury or damage. Keep this manual for future reference.

Image 1.1: The Stanley SL18910P-3 3 Gallon Portable Wet/Dry Shop Vacuum.
2. Safety Information
Always follow basic safety precautions when using electrical appliances to reduce the risk of fire, electric shock, and personal injury.
- Read all instructions before operating the vacuum.
- Do not leave the vacuum unattended when plugged in. Unplug from outlet when not in use and before servicing.
- Do not use outdoors or on wet surfaces.
- Do not allow to be used as a toy. Close attention is necessary when used by or near children.
- Use only as described in this manual. Use only manufacturer's recommended attachments.
- Do not use with damaged cord or plug. If the vacuum is not working as it should, has been dropped, damaged, left outdoors, or dropped into water, return it to a service center.
- Do not pull or carry by cord, use cord as a handle, close a door on cord, or pull cord around sharp edges or corners. Do not run vacuum over cord. Keep cord away from heated surfaces.
- Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
- Do not handle plug or vacuum with wet hands.
- Do not put any object into openings. Do not use with any opening blocked; keep free of dust, lint, hair, and anything that may reduce air flow.
- Keep hair, loose clothing, fingers, and all parts of body away from openings and moving parts.
- Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes.
- Do not use to pick up flammable or combustible liquids, such as gasoline, or use in areas where they may be present.
- Do not use without filters in place.
- Turn off all controls before unplugging.
- Use extra care when cleaning on stairs.
- Do not use to pick up toxic material (chlorine bleach, ammonia, drain cleaner, etc.).
3. Package Contents
Verify that all items listed below are included in your package. If any parts are missing or damaged, contact customer support.
- Stanley SL18910P-3 Wet/Dry Vac x 1
- 1-1/4" x 4’ Stretchable Hose x 1
- 3-in-1 Crevice Nozzle x 1
- Gulper Nozzle x 1
- Foam Filter x 1
- Reusable Dry Filter x 1
- Clamping Ring x 1
- User Manual x 1

Image 3.1: All components included with the Stanley SL18910P-3 vacuum.
4. Assembly and Setup
Follow these steps to assemble your wet/dry vacuum before first use.
- Unpack Components: Carefully remove all items from the packaging.
- Attach Hose: Connect the 1-1/4" x 4’ stretchable hose to the inlet port on the front of the vacuum tank. Ensure it is securely twisted into place.
- Install Filter (Dry Vacuuming): For dry vacuuming, ensure the reusable dry filter is installed over the foam filter. The foam filter should be placed over the filter cage inside the tank, and the reusable dry filter over the foam filter, secured with the clamping ring.
- Install Filter (Wet Vacuuming): For wet vacuuming, remove the reusable dry filter and ensure only the foam filter is installed over the filter cage. The foam filter protects the motor from liquids.
- Attach Nozzle: Select the appropriate nozzle (3-in-1 crevice nozzle or gulper nozzle) and attach it to the end of the hose.
- Power Connection: Ensure the power cord is neatly wrapped around the top handle for storage. Unwind completely before plugging into a grounded electrical outlet.

Image 4.1: Rear view showing power cord storage and hose attachment point.
5. Operation
The Stanley SL18910P-3 vacuum is designed for both wet and dry cleaning tasks.
5.1 Dry Vacuuming
For dry debris, dust, or dirt, ensure the reusable dry filter is properly installed over the foam filter. Plug the vacuum into a suitable electrical outlet and press the power switch to the 'ON' position. Use the appropriate nozzle for the cleaning task.

Image 5.1: Using the vacuum for upholstery cleaning.
5.2 Wet Vacuuming
For liquid spills, remove the reusable dry filter and ensure only the foam filter is installed. The vacuum features a 'Safe Buoy Technology' which automatically shuts off suction when the tank is full to prevent overflow. Once the tank is full, empty it before continuing. To empty, unplug the unit, remove the motor head, and pour out the liquid.

Image 5.2: Illustrates the powerful wet/dry suction and Safe Buoy Technology.
5.3 Nozzle Usage
- 3-in-1 Crevice Nozzle: Ideal for tight spaces, corners, and detailed cleaning in cars or workshops.
- Gulper Nozzle: Suitable for larger areas and general debris pickup on floors or upholstery.

Image 5.3: Multi-space wet/dry pickup capabilities.

Image 5.4: Effective for car detailing and interior cleaning.
6. Maintenance
Regular maintenance ensures optimal performance and extends the life of your vacuum.
6.1 Emptying the Tank
After each use, especially after wet vacuuming, empty the 3-gallon poly tank. Unplug the vacuum, unlatch the motor head, and carefully lift it off. Dispose of collected debris or liquid responsibly.
6.2 Filter Cleaning and Replacement
- Reusable Dry Filter: For dry vacuuming, the reusable dry filter should be cleaned regularly. Tap off loose dirt or rinse with water if heavily soiled. Allow to air dry completely before reinstallation.
- Foam Filter: For wet vacuuming, the foam filter should be rinsed with water after each use and allowed to air dry completely before storage or next use.
- Replace filters if they become damaged or excessively worn.

Image 6.1: Proper filter installation for dry and wet vacuuming.
6.3 Hose and Accessory Cleaning
Wipe down the hose and nozzles with a damp cloth as needed. Ensure they are free of blockages before storage.
7. Troubleshooting
Refer to this section for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Vacuum does not turn on | No power supply; Power switch off; Damaged cord/plug | Check power outlet; Ensure switch is ON; Inspect cord/plug for damage (do not use if damaged) |
| Low suction power | Clogged hose/nozzle; Full tank; Dirty filter; Improper filter installation | Clear blockages; Empty tank; Clean/replace filter; Ensure filter is correctly installed |
| Liquid overflow during wet vacuuming | Tank is full; Foam filter not installed or damaged | Empty tank; Ensure foam filter is correctly installed and undamaged |
| Unusual noise | Blockage in hose/nozzle; Loose parts; Motor issue | Check for and clear blockages; Ensure all parts are secure; If noise persists, contact customer support |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | SL18910P-3 |
| Capacity | 3 Gallons |
| Motor Horsepower | 3 Peak HP |
| Hose Length | 4 Feet (stretchable) |
| Power Cord Length | 6 Feet |
| Cleaning Reach | Over 10 Feet (Hose + Cord) |
| Filter Type | Foam (Wet), Reusable Dry Filter |
| Special Feature | Corded, Portable, Wet/Dry Function, On-board Accessory Storage |
| Product Dimensions | 13.67"L x 10.67"W x 15.12"H |
| Item Weight | 6.8 pounds |
| Noise Level | 86 Decibels |
| Indoor/Outdoor Usage | Indoor |

Image 8.1: Product dimensions of the vacuum.
9. Warranty and Support
Your ECOWELL Stanley SL18910P-3 Wet/Dry Vac comes with a 12-Month Limited Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
The warranty does not cover:
- Damage caused by misuse, abuse, accident, or neglect.
- Damage from unauthorized repairs or modifications.
- Normal wear and tear, including filters and accessories.
For warranty claims or technical support, please contact ECOWELL customer service through the retailer where the product was purchased or refer to the contact information provided in your original purchase documentation.







