1. Introduction
The Bosch GAS 12-25 Professional Wet/Dry Extractor is designed for efficient cleaning in various environments, offering powerful suction for both wet and dry applications. This extractor features a 1250W motor, a HEPA H13 filter for capturing fine dust, and a 25-liter capacity. Its patented filter cleaning technology ensures consistent suction performance and extends filter life. The compact and portable design allows for easy transport and flexible use across different job sites.
2. Package Contents
Verify that all items listed below are present in the package before beginning assembly or operation.

Image: The package contains the Bosch GAS 12-25 Wet/Dry Extractor along with its accessories.
- 1x Bosch GAS 12-25 Wet/Dry Extractor
- 1x Crevice Nozzle
- 1x Antistatic Pipe
- 1x 3m Hose (35 mm diameter)
- 1x HEPA Filter
- 1x Pre-filter
3. Setup
Follow these steps to set up your Bosch GAS 12-25 Professional Wet/Dry Extractor for use.
- Connect the Hose and Accessories: Securely attach the 3-meter hose to the extractor's inlet port. Then, connect the desired accessories, such as the crevice nozzle or antistatic pipe, to the end of the hose. Ensure all connections are tight to prevent suction loss.

Image: Step 1 - Connect the hose and accessories to the extractor.
4. Operating Instructions
Operating the Bosch GAS 12-25 is straightforward. Ensure the unit is properly set up before powering on.
- Power On: Plug the extractor into a suitable 230V power outlet. Locate the power switch on the unit and switch it to the 'ON' position to start the powerful wet or dry vacuuming.

Image: Step 2 - Switch on to start powerful wet or dry vacuuming.
- Emptying the Container: Once cleaning is complete, or the container is full, switch off the extractor and unplug it. Carefully detach the hose and open the container latches. Empty the collected debris or liquid into an appropriate disposal area.

Image: Step 3 - Easily empty the container after cleaning is complete.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Bosch GAS 12-25 extractor.
Filter Cleaning
The Bosch GAS 12-25 features patented filter cleaning technology to maintain consistent suction power. This system reduces the frequency of manual filter cleaning. The H13 HEPA filter captures 99.95% of fine dust particles, ensuring a cleaner workspace. The large surface pre-filter further enhances the main filter's lifespan, minimizing downtime.
- Periodically check the filters for excessive buildup.
- Refer to the full manual for detailed instructions on activating the patented filter cleaning mechanism or for manual cleaning procedures.
- Replace filters as needed to maintain filtration efficiency and suction power.
General Cleaning
- Wipe down the exterior of the unit with a damp cloth.
- Ensure the container is clean and dry after wet extraction to prevent mold or odors.
6. Troubleshooting
If you encounter issues with your extractor, consult the following common troubleshooting tips.
| Problem | Possible Cause | Solution |
|---|---|---|
| No suction or weak suction | Hose or nozzle blocked; filter clogged; container full; loose connections | Check and clear blockages; clean or replace filter; empty container; ensure all connections are secure |
| Extractor does not turn on | No power supply; faulty power cord/switch | Check power outlet and cord; contact customer support if issue persists |
| Unusual noise during operation | Foreign object in fan/motor; damaged motor | Turn off and unplug, inspect for foreign objects; contact customer support |
7. Specifications
Detailed technical specifications for the Bosch GAS 12-25 Professional Wet/Dry Extractor.

Image: Technical data overview for the Bosch GAS 12-25.
| Feature | Specification |
|---|---|
| Brand | Bosch |
| Model Name | GAS12-25 |
| Power Source | Corded Electric |
| Wattage / Motor Horsepower | 1250 Watts |
| Voltage | 230V (Electrical) / 251 Volts (Rated) |
| Filter Type | HEPA Filter (H13) |
| Container Volume (Gross) | 25 Liters |
| Container Volume (Net) | 21 Liters |
| Container Volume (Net, Water) | 15 Liters |
| Dust Bag Volume (Net) | 20 Liters |
| Maximum Suction | 300 Millimetres / 200 mbar (Turbine) |
| Airflow Rate (Turbine) | 65 Liters/Second |
| Filter Surface Area | 2,300 cm² |
| Item Weight | 9 kg |
| Product Dimensions | 58L x 48.7W x 39.4H Centimeters |
| Special Feature | Dry, Wet |
| Recommended Uses | Indoor, Outdoor, Hardwoods |
8. Warranty and Support
Your Bosch GAS 12-25 Professional Wet/Dry Extractor comes with a 1-year warranty from the date of purchase, covering manufacturing defects.
Customer Support
For any product-related queries, technical assistance, or warranty claims, please contact Bosch customer care:
- Customer Care Number: 18004258665
- Manufacturer Address: Bosch Ltd., Post Box No: 3000, Hosur Road, Adugodi, Bangalore - 560030, India
Extended warranty plans may be available for purchase separately. Please refer to your retailer for details.





