SOMMER Group
USA

AquaLOCK® Flap – Flood Protection

Compact water protection for openings in interior and exterior applications.

AquaLOCK® Flap shown in workshop, displayed open with frame and sealing system

AquaLOCK® Flap

The AquaLOCK® Flap delivers flexible, high‑performance protection for openings up to 1300 × 1300 mm. Designed for quick installation and effortless operation, it offers reliable water protection for residential, commercial, and industrial applications alike.

AquaLOCK® Flap with reinforced rear structure and multiple locking levers in workshop setup

Applications

Vertical Installation:

  • Basement Windows
  • Workshop Windows
  • Silo Openings
  • Wall Openings
  • Machine Access Openings

Horizontal Installation:

  • Shaft Covers
  • Drainage Opening Covers
  • Ceiling Openings
AquaLOCK® Flap side view showing metal frame, reinforcement ribs and mounted locking levers

Key Advantages of the AquaLOCK® Flap

  • Max. Size: 1300 × 1300 mm
  • Robust Steel Construction: Galvanized or stainless steel
  • Any RAL Color: Fully customizable finish
  • Quick Installation: Fast and easy setup
  • 180° Opening: Full access when needed
  • Quick‑Locking System: Crank handles for easy operation
  • AquaLOCK® Sealing: Four‑sided sealing, up to 99.6% water resistance
  • Hinge‑Free Option: Removable panel for flexible access
  • Certified Performance: Resists 2.3 m water column
AquaLOCK® Flap viewed from above showing three reinforcement ribs and perimeter locking system

Tested Flood Resistance up to 1.3 Meters

Like all AquaLOCK® products, the Flap has undergone rigorous testing to meet high-performance standards. It can withstand water pressure equivalent to a water level of 1.3 meters, providing robust flood protection.

FAQ – AquaLOCK® Flap Flood Protection

The AquaLOCK® Flap is a high-quality system for reliable flood protection and effective sealing of technical openings. It provides strong sealing performance, high durability, and protects buildings from water ingress. The AquaLOCK® Flap ensures safe operation even under demanding conditions.

Function and Purpose

The AquaLOCK® Flap acts as a robust barrier against water, preventing entry into sensitive areas. It stabilizes vulnerable zones and protects installations, access points, and technical penetrations.

Construction and Features

The system is made of durable components that support high sealing performance and long-lasting reliability. The AquaLOCK® Flap is designed for intensive use and meets the requirements of modern flood protection solutions.

Typical Applications
  • Technical openings and building penetrations
  • Vulnerable basements and ancillary rooms
  • Areas with increased water exposure
Summary

The AquaLOCK® Flap is a robust flood protection system for technical openings, offering strong sealing performance and high durability.

The AquaLOCK® Flap provides flood protection through precisely guided sealing, high sealing performance, and robust durability. The AquaLOCK® Flap reliably closes technical openings, minimizes leakage, and withstands water pressure. In this way, the AquaLOCK® Flap delivers effective flood protection for building penetrations, shafts, and sensitive technical areas.

Operating Principle

The AquaLOCK® Flap forms a tight barrier against incoming water. Durable seals and a sturdy frame ensure uniform pressure and long-lasting sealing under realistic flood conditions.

Construction & Performance
  • High sealing performance through rigid, stable components
  • Resistance to hydrostatic pressure
  • Corrosion-resistant materials for long service life
Typical Applications
  • Basement access points, utility shafts, technical rooms
  • Building penetrations and service openings
  • Vulnerable areas with recurring water exposure
Summary

The AquaLOCK® Flap provides structurally tight, durable flood protection sealing for technical openings and reliably protects buildings from water ingress.

The AquaLOCK® Flap protects openings up to 1300 × 1300 mm and provides reliable flood protection for compact but critical access points. Thanks to high sealing performance, durability, and flexible sealing, the AquaLOCK® Flap ensures safety across various building types—from residential to industrial.

Protection for Compact Technical Openings

With a maximum size of 1300 × 1300 mm, the AquaLOCK® Flap is ideal for smaller service, maintenance, and technical openings that still require effective flood protection.

Applications Across Building Types
  • Residential buildings with sensitive access points
  • Commercial facilities and technical rooms
  • Industrial buildings with vulnerable shafts
Flexible Installation Options

The AquaLOCK® Flap can be installed within the reveal or in front of the opening, adapting to different structural conditions.

Summary

The AquaLOCK® Flap safely protects openings up to 1300 × 1300 mm and is suitable for critical, compact access points in all building types.

The AquaLOCK® Flap can be installed wherever flood protection, sealing, and high sealing performance are required. The AquaLOCK® Flap is particularly suitable for structurally prepared openings, vulnerable access points, and areas with increased water exposure. It provides robust durability and reliable protection across different building types.

Suitable Installation Locations

The AquaLOCK® Flap is mounted in structurally designated areas that allow for a stable flap installation and require effective flood protection.

  • Areas with elevated moisture or water exposure
  • Openings designed structurally for flaps
  • Zones where targeted flood protection is necessary
Summary

The AquaLOCK® Flap is installed in structurally prepared areas, providing effective flood protection, sealing, and high durability.

Yes, the AquaLOCK® Flap is certified and provides tested flood protection with high sealing performance and reliable tightness. The AquaLOCK® Flap meets relevant quality standards, has been tested under realistic flood conditions, and offers maximum durability for all types of technical openings.

Tested Flood Resistance

The AquaLOCK® Flap is tested under realistic water pressure scenarios. The focus is on sealing, functional stability, and long-term durability to ensure effective flood protection.

Certified Material and Manufacturing Quality

All materials and manufacturing processes comply with strict quality guidelines. Regular inspections ensure consistently high sealing performance and reliable tightness.

Independent Testing Authorities

External institutes regularly verify the performance of the AquaLOCK® Flap, providing objective evidence of safety, durability, and functional quality.

Summary

The AquaLOCK® Flap is fully certified and demonstrably delivers high sealing performance, material quality, and reliable flood protection.

Yes, the AquaLOCK® Flap can be individually customized and provides a perfectly tailored solution for any installation situation. The AquaLOCK® Flap offers flexible options for flood protection, sealing, and tightness, and can be adapted visually and structurally to different construction requirements.

Custom-made Solutions

AquaLOCK® systems are manufactured to customer specifications. Opening sizes and proportions can be precisely adjusted to existing structural conditions to ensure maximum durability and functional reliability.

Visual and Structural Adaptations

Variations in surface finish, dimensions, or construction details are possible, allowing the flap to integrate harmoniously into any environment.

Adaptation to Installation Situations
  • Installation within the reveal
  • Installation in front of the opening
  • Flexible adjustment to different structural conditions
Summary

The AquaLOCK® Flap is highly configurable and can be precisely adapted both visually and structurally to individual construction requirements.

Yes, the AquaLOCK® Flap supports various installation methods and can be flexibly adapted to structural requirements. The AquaLOCK® Flap provides high sealing performance and reliable flood protection in different installation situations and can be optimally integrated into existing or new building structures.

Adaptation to Local Structural Conditions

The installation is guided by the on-site structural conditions. This allows the AquaLOCK® Flap to be precisely integrated into existing openings to ensure sealing and load-bearing capacity.

Flexible System Components for Diverse Scenarios

AquaLOCK® system products – including the flap range – are designed to support various installation scenarios in residential, commercial, and industrial settings.

  • Versatile use in technical rooms
  • Application in service openings and access points
  • Flood protection in vulnerable building areas
Use in Different Building Environments

The modular structure allows flexible installation in both new constructions and existing buildings. This enhances adaptability to individual structural requirements.

Summary

The AquaLOCK® Flap supports a wide range of installation methods and can be flexibly adapted to residential, commercial, and industrial environments.

Yes, the AquaLOCK® Flap remains fully functional in everyday use. The AquaLOCK® Flap combines flood protection, sealing, and stable performance with convenient daily usability. It can be operated like a standard access flap while remaining easily accessible and durable despite its protective function.

Everyday Usability

The flap can be opened and closed like a regular access hatch, keeping maintenance areas, technical rooms, or service openings readily accessible at all times.

Full Function in Daily Operation

Unlike rigid flood barriers, the AquaLOCK® Flap remains a fully functional opening and allows continuous access without limitations.

Protection During Flood Events

In case of flooding, the AquaLOCK® Flap provides high sealing performance and reliable flood protection without affecting everyday use.

Summary

The AquaLOCK® Flap is fully usable in daily life while providing robust and reliable flood protection.