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"When building my own dreamhouse, we only choose the best contractors in their field. That is how we got to Hydrosight." John M., Architect London/Pafos

1-0. Easy Installation

The underwater window installation procedure is easy and well tested. As a pool builder you will not require any special training to install our windows. A step-by-step manual is always provided in addition to email and telephone support.

The Hydrosight underwater window differs from the regular installation: We make use of steel frames. The additional cash compared to any bare acrylic block approach is a good investment. It saves you so much time on the site. It keeps hassle between you and the client away, as you can deliver what you promised - always.

Our windows do not demand top ideal conditions for operation. Tolerances in the concrete shell are acceptable and do not intervene with the functioning of the windows. Hydrosight glazing is shatter proof, so the risk of damage while on transport or installation is neglible.


The unique Hydrosight frame system make our underwater windows so outstanding. These frames enable an untrained pool builder to install undewater windows.


Installation manual for tiled pools

How to Install? Hydrosight On-Site Installation Service

2-0. Large Selection of Sizes and Types

Individual solutions, your project - our challenge!

You require a window where size and depth rating suit your exact requirements? Hydrosight modular window design provides you with exactly the product you need.

A wide range of types, shapes and sizes is at your disposition. Your windows will be ready for delivery after a short production time.


Any shape, you want: Hydrosight pool windows can be loooooong

Standard Sizes

3-0. Quality

When you choose Hydrosight underwater windows, you choose for quality you can count on. Our cutting-edge engineering solutions have been enabling the use of windows underwater, much before this approach became common. Hydrosight delivers top-notch products in order to give you the confidence you need for your projects.

3-1-0. Made in Germany

All Hydrosight products are completely developed and manufactured in Germany at our site in Emmerich am Rhein.

Straight from the Manufacturer

Hydrosight is expert in the field of underwater windows. We know and understand every detail and feature since we go through every stage of design and production, hence we are in a rightful position to provide the best advice and the best price to you as a customer.

Control and Monitoring

Independent Structural calculations are regularly checked by an independent structural engineer, using FEA analysis. Separate FEA reports, including tension and deflection are provided on request.

3-2-0. Plexiglas

Hydrosight Underwater Window Glazing behaves similarly to stainless steel. It is a plastic that grows older without aging. Its unsurpassed durability and weather resistance make it the best glazing for underwater use.
Together with our material supplier we can give up to 30 years guarantee.


The windows are made for chlorinated water of swimming pools. They can also withstand marine water.


Hydrosight windows are will never cloud due to condensation


No Hydrosight underwater window will ever shatter.


Hydrosight Windows have a natural UV protection. That is what it makes our product best suited for outdoor applications.


The acrylic window blocks are made from high-molecular, monolithic material, that can withstand permanent long term stress.


Our window blocks are virtually unaffected by aging. Neither the transparency, nor the color of the glass will be visibly affected.

3-3-0. Stainless Steel

There's no question that some of the best and most enduring pools are made from stainless steel. Hydrosight gets this fantastic material from a steel mill not even 100km away, in ArcelorMittal's Duisburg operations.

The window frame is made of marine-grade stainless steel of the types 1.4404/316L and 1.4571/316Ti. On request Hydrosight delivers TÜV certified steel works according to DIN-Norm V 18800-7.

4-0. Safety

When it comes to safety we make no compromises. All Hydrosight products are certified to be 100% waterproof.

Hydrosight has over 15 years experience in sealing underwater windows. 0 is the defect rate we've had so far with the hundreds of windows provided by us. Even more: None of the installed Hydrosight windows have shown leakage after continuous operation. Hydrosight, unlike others in the market, guarantees the maximum security and safety for any desired project of yours, all thanks to our double safety technology. This service also comes with customized adaptations for the relevant climate conditions.

Each window provided by Hydrosight is individually calculated to withstand the given daily water pressure required from the habitat of the window.


Resisting the pressure of tons of water every day, even for the most
delicate use


All Hydrosight products are factory tested and certified to be 100% waterproof before they are shipped.


4-1-0. Safety (and Quality) Standards

Pressure Tested Seal

Each Hydrosight Underwater Window is marked with a signed "Pressure Tested" seal. It shows that each of the two seals of the window have been tested OK for the required water depth.

QPA Certificate for Glazing

QPA stands for Qualitätsprüfung bei Auslieferung. The QPA will result in an acceptance test certificate for individual acrylic blocks in accordance to DIN EN 10204. The QPA test is part of a set of regulations provided by our manufacturer of acrylic blocks. The whole set of certificates enables Hydrosight to provide products according to Germanischer Loyd's classification and building rules. It can be used to certify products to ASME/PVHO. PVHO is mostly used in marine (especially submarine) applications. The QPA test results are provided for special purpose windows, similar to those listed in chapter "Hydrosight Service Contracts"


The PVHO rules are written for a water depth of several hundred meters. However underwater windows in ship hulls and in semi submarines are located close to the water surface. For this application PVHO should not be applied. A more interactive approach between the classification society in charge and the marine engineers should be preferred. This approach should include comparisons with similar vessels, applied examination of static of the window structure, material certificates and the like.


Each window is sealed and tested in our factory and includes a test

5-0. ...and the kids will love it!

Underwater windows are fun for the whole family. Especially children! They will love the ability of interacting with friends and family through one of our windows.