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Engineered for modern boating enthusiasts, the Lewmar Size 22 Low Profile Hatch stands out with its minimalist design that blends seamlessly into deck surfaces. This flange base model excels on powerboats where aerodynamics matter most, minimizing drag while maximizing natural ventilation. On sailboats, its compact footprint fits perfectly in tight spaces like cabins or cockpits, and for mid-sized yachts, it serves as a reliable foredeck access point. What sets it apart is Lewmar's innovative sealing technology, which simplifies acrylic panel swaps without specialized tools—ideal for keeping your vessel looking sharp season after season.
Crafted for durability in harsh marine environments, this hatch complies with CE Category A2 standards, making it safe for exposed deck, coachroof, cockpit, and transom installations. Its self-supporting mechanism holds firm in breezy conditions, eliminating the need for additional struts and reducing maintenance hassles.
At a lightweight 12.8 lbs, it won't burden your boat's structure, and the 9/16-inch lower frame provides a stable mounting base for various deck thicknesses.
Accurate measurements are crucial for a professional install. Here's a breakdown to help plan your cut-out and mounting:
| Specification | Imperial (inches) | Metric (approx.) |
|---|---|---|
| Overall Diameter | 23 1/8 | 587 mm |
| Height (Z) | 1 | 25 mm |
| Hinge Length (HX) | 23 1/4 | 591 mm |
| Hinge Width (HY) | 6 13/16 | 173 mm |
| Cut-Out Diameter | 20 3/8 | 518 mm |
Note: Verify deck thickness against the 9/16-inch lower frame for optimal sealing.
Installing the Lewmar Size 22 is straightforward with basic tools like a jigsaw, sealant gun, and drill. Start by tracing the 20 3/8-inch cut-out precisely—use the provided template for perfection. Apply marine-grade sealant around the flange, bed the hatch firmly, and secure with stainless screws. The unique sealing system allows for compression without over-tightening, preventing leaks. For best results, angle the hatch slightly forward to shed water efficiently. Pro tip: Test the self-supporting action post-install by simulating wind loads.
Keep your hatch performing like new with simple upkeep. Annually inspect seals for wear and lubricate hinges with silicone spray. The acrylic's 3/8-inch thickness resists cracking, but clean gently with freshwater and mild soap to avoid scratches. Replacing the panel? Lewmar's system lets you pop it out in minutes—no adhesives or frame disassembly required. In saltwater zones, rinse thoroughly after every outing to combat corrosion.
Beyond specs, this hatch delivers real-world value: superior airflow for cabin comfort, a modern look that boosts resale appeal, and proven reliability from a brand synonymous with marine innovation. Whether upgrading an older powerboat or outfitting a sleek sailboat, the Size 22 strikes the perfect balance of form, function, and fuss-free ownership.
It's ideal for powerboats due to its aerodynamic low profile, smaller sailboats for ventilation needs, and mid-sized yachts as foredeck hatches. CE Area 2 certification covers decks, coachroofs, cockpits, and transoms.
Friction hinges provide adjustable resistance, holding the hatch open securely at any angle without gas struts, making it reliable in wind without extra parts to maintain.
Yes, Lewmar's unique sealing system allows quick acrylic removal and replacement without tools or frame disassembly—perfect for DIY repairs.
The precise cut-out diameter is 20 3/8 inches (518 mm). Always use the manufacturer's template for accuracy.
The smoke grey acrylic measures 3/8 inch thick, offering UV protection, impact resistance, and reduced glare for clear visibility.
Yes, at just 12.8 lbs, it's manageable for solo installation and adds minimal weight to your boat's structure.
Rinse with freshwater after saltwater use, inspect seals yearly, and lubricate hinges. Acrylic cleans with mild soap—no harsh chemicals needed.
The sleekly designed Low Profile Hatch is ideal for use on a powerboat. Smaller ventilation hatches are a better fit for sailboats, while the larger sizes can be used as foredeck hatches on smaller to mid size yachts. Lewmar hatches feature Lewmar's unique sealing system allowing easy acrylic replacement. All sizes suitable for CE Area 2 (Deck, Coachroof, Cockpit and Transom).
| Support System | Lower Frame (in) | Acrylic Colour | Hatch Weight (lb) | Acrylic Window Thickness (in) |
|---|---|---|---|---|
| Self Supporting | 9/16 | Smoke Grey | 12.8 | 3/8 |
| Diameter (in) | Height Z (in) | Hinge Length HX (in) | Hinge Width HY (in) | Cut-Out Diameter 1 (in) |
|---|---|---|---|---|
| 23 1/8 | 1 | 23 1/4 | 6 13/16 | 20 3/8 |
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