Introduction
The Cressi Alpha Ultra Dry Snorkel is designed to enhance your underwater experience by providing a reliable and comfortable breathing solution for snorkeling and scuba diving. Its advanced features aim to prevent water entry and facilitate easy clearing, allowing users to focus on their aquatic environment.
Key features include:
- Dry Top Mechanism: Automatically closes upon submersion to prevent water from entering the snorkel tube.
- Purge Valve: A large, lower purge valve allows for effortless water clearing.
- Flexible Corrugated Tube: Reduces jaw fatigue and allows for compact folding.
- High-Quality Silicone Mouthpiece: Comfortable, removable, and replaceable, designed to minimize jaw fatigue.
- Adjustable Clip: Securely attaches the snorkel to your mask strap.
Setup and Assembly
- Attaching to Mask: Use the adjustable clip located on the snorkel tube to securely fasten the snorkel to your diving mask strap. Ensure the snorkel is positioned comfortably on your left side, allowing the mouthpiece to reach your mouth without strain.
- Mouthpiece Adjustment: The high-quality silicone mouthpiece is designed for comfort. Position it in your mouth so that your teeth gently grip the tabs and your lips form a seal around it.
- Folding for Storage: For compact storage or travel, the flexible corrugated tube allows the snorkel to fold. Gently bend the tube until the mouthpiece section aligns with the main tube. This feature is particularly useful for divers who prefer to store their snorkel in a BCD pocket when not in use.

Image: Adjustable clip for securing the snorkel to a mask strap.

Image: The snorkel in its folded configuration, demonstrating its compact design for travel or storage.
Operating Instructions
Breathing on the Surface
While on the surface, the dry top mechanism remains open, allowing unrestricted airflow through the snorkel tube. Breathe naturally and calmly through your mouth. The generous bore contoured tube ensures ample airflow for comfortable breathing.
Submerging Underwater
When you submerge, the profiled dry top automatically closes, preventing water from entering the snorkel tube. This allows for a dry re-entry to surface breathing without the need to clear a water-filled tube immediately.
Clearing Water
Should any water enter the snorkel (e.g., from waves or improper seal), the lower purge valve facilitates easy clearing. Upon surfacing, exhale sharply through the mouthpiece. The water will be expelled through the one-way purge valve at the bottom of the snorkel, requiring minimal effort.

Image: Key features of the snorkel, including the dry top (Aqua Stop System), flexible tube, and purge valve.

Image: Detailed view of the dry top, showing how it prevents water entry when submerged.
Video: Official product video showcasing the Cressi Alpha Ultra Dry Snorkel's design and functionality, including its dry top and flexible tube.
Maintenance and Care
Proper maintenance ensures the longevity and optimal performance of your Cressi Alpha Ultra Dry Snorkel.
- Rinsing: After each use, thoroughly rinse the snorkel with fresh water to remove salt, sand, and chlorine.
- Drying: Allow the snorkel to air dry completely in a shaded area, away from direct sunlight, before storing.
- Storage: Store the snorkel in a cool, dry place. Avoid storing it under heavy objects or in direct sunlight for extended periods, as this can degrade the silicone and plastic components.
- Mouthpiece Replacement: The silicone mouthpiece is removable and replaceable. Inspect it periodically for signs of wear or damage. Replacement mouthpieces can be obtained from authorized Cressi dealers.
Troubleshooting
Float Valve Sticking
Issue: The float mechanism in the dry top may occasionally stick, preventing proper airflow or sealing.
Solution:
- After rinsing, ensure the float mechanism moves freely. Gently tap the top of the snorkel or manually move the float to dislodge any debris or salt residue.
- If the issue persists, a small amount of silicone lubricant (specifically designed for diving gear) can be applied to the moving parts of the float valve to ensure smooth operation.
Water Entry During Use
Issue: Water consistently enters the snorkel despite the dry top feature.
Solution:
- Check Mouthpiece Seal: Ensure your lips form a tight seal around the mouthpiece and that there are no gaps.
- Inspect Dry Top: Verify that the dry top mechanism is clean and free of sand or debris that might prevent it from sealing completely.
- Snorkel Position: Confirm the snorkel is correctly positioned and securely attached to your mask, preventing excessive movement that could break the seal.
Specifications

Image: Size chart for Cressi snorkels, providing general dimensions.
| Feature | Detail |
|---|---|
| Model Name | ES258150 |
| Brand | Cressi |
| Material | Plastic, Rubber, Silicone |
| Item Weight | 0.17 Kilograms |
| Item Dimensions (LxWxH) | 16.93 x 1.5 x 3.94 inches |
| Sport Type | Diving, Freediving, Scuba Diving, Snorkeling |
| Included Components | Dry Snorkel |
| Manufacturer | Cressi U.S.A. |
Warranty and Support
The Cressi Alpha Ultra Dry Snorkel is covered by a 2-year limited warranty. For warranty claims, product support, or further inquiries, please contact Cressi U.S.A. customer service or visit the official Cressi website.
You can find more information and contact details on the Cressi Store on Amazon.





