POOLFIX® | SAFE FASTENERS FOR SWIMMING POOLS
Chlorides, tensile stress and the swimming-pool atmosphere can cause stress corrosion cracking in common stainless-steel grades. A fastener may still look sound on the outside, while crack formation can ultimately lead to sudden failure.
PoolFIX research: A2/A4 stainless steel showed a 86% probability of stress corrosion cracking within 1 year.*
NEN 9200:2025 • Material selection • Certification • Traceability
Stainless steel can fail in a swimming pool without warning.
Fastening products that comply with Building Decree 2012 – NPR-9200 – Bbl 2022 and Quality Assurance Act with the highest quality for your swimming pool.
“Since our first experience with PoolFIX, we don't want anything else.” Swimming pool inspector
All PoolFIX products are manufactured with meticulous knowledge to meet the highest standards for use in your swimming pool application. We strive for convenience and speed so we can quickly help you with the right materials. PoolFIX products contribute to a safe swimming environment.
The use of stainless steel fasteners is prohibited. By providing carbon steel bolts, screws and nuts with the right surface treatment, it guarantees the most reliable fastening solution. The fasteners you receive come with PoolFIX® certificate which can easily be included in your administration.
POOLFIX RESEARCH
The percentages below are research findings under the investigated swimming-pool conditions — not a universal guarantee for every location or application.
COMMON STAINLESS STEEL
86%
probability of stress corrosion cracking within 1 year*
In the PoolFIX research, common stainless steel such as A2/304 and A4/316 showed very high susceptibility to stress corrosion cracking under the investigated swimming-pool conditions.
HIGH RISKHIGH CORROSION RESISTANT
2%
probability of stress corrosion cracking within 5 years*
1.4529 HCR also proved not to be completely immune to stress corrosion cracking. That is why PoolFIX applies a limited application guideline for this material.
RESIDUAL RISKSWIMMING-POOL-SPECIFIC SYSTEM
POOLFIX COATED
application-specific system
A coated fastening system specially developed for swimming-pool applications, for suitable locations and exposure zones.
APPLICATION-SPECIFIC* Source: research carried out by PoolFIX in collaboration with Koninklijke BAM for the municipality of Tilburg. The actual susceptibility to stress corrosion cracking remains dependent on, among other things, material stress, chloride load, temperature, geometry, exposure and location.
TESTED IN PRACTICE
The displayed risk percentages are based on research by PoolFIX in collaboration with Koninklijke BAM, carried out for the municipality of Tilburg.
STRESS CORROSION CRACKING
A fastener can still appear visually completely intact while local crack formation is already present. In stress corrosion cracking, chlorides, tensile stress and a susceptible material can combine to cause progressive cracking and ultimately sudden failure.
01
No clear damage visible
02
Cracking develops locally in the material
03
The remaining cross-section ultimately becomes insufficient
VISUALLY SOUND DOES NOT AUTOMATICALLY MEAN SAFE.
That is why material selection in a swimming-pool environment must be based on application, exposure and demonstrable suitability — not only on the term ‘stainless steel’.
Learn to recognize stress corrosion crackingA2 / A4 STAINLESS STEEL
A2 and A4 are considered corrosion-resistant materials in many general construction and installation applications. A swimming-pool hall, however, is an exceptional environment in which chloride load and tensile stresses can lead to stress corrosion cracking.
86%
probability of stress corrosion cracking within 1 year*
PoolFIX × Koninklijke BAM — municipality of Tilburg
* Source: research carried out by PoolFIX in collaboration with Koninklijke BAM for the municipality of Tilburg. The actual susceptibility to stress corrosion cracking remains dependent on, among other things, material stress, chloride load, temperature, geometry, exposure and location.
1.4529 HCR
1.4529 HCR has much higher corrosion resistance than common stainless-steel grades, but in PoolFIX research this material also proved not to be completely immune to stress corrosion cracking.
2%
probability of stress corrosion cracking within 5 years*
PoolFIX × Koninklijke BAM — municipality of Tilburg
APPLICATION LIMITATION 1.4529
Do not use 1.4529 as a universal replacement for A2/A4 or other materials at arbitrary locations in a swimming-pool environment. Material selection must always fit within the official PoolFIX application guideline and the project-specific circumstances.
Do not ask: ‘which stainless steel should I use?’
DEMONSTRABLE MATERIAL SELECTION
In a public swimming pool, material selection is not a detail. Designers, contractors, installers, technical services, managers and inspectors must be able to substantiate why the materials used are suitable for their environment and application.
It is not only the product that matters. The substantiation matters too.
Material matched to location, application and exposure.
Technical documentation linked to the delivered item.
Delivery, item and project are traceable.
Documentation supports future management and inspection.
FROM ASSUMPTION TO SUBSTANTIATION
From Europe to the United States, the Middle East, Asia and Australia — PoolFIX® fasteners are used worldwide in private, commercial and public swimming pools.
TRUST & COMPLIANCE
From material selection and order to certificate and inspection, PoolFIX connects the technical data of every delivery in one verifiable chain.
From certificate to digital record
One verifiable chain
Essential delivery, product and inspection data remains connected and available to the parties that need it.
A consistent information structure connects material, application and delivery data.
Every relevant delivery receives a clear certificate with order, product and standards data.
A unique QR reference takes authorised users directly to the current product record.
Documentation remains available for maintenance, handover and future inspections.
Delivery data, documents and inspection moments form a clear history.
The record does not depend on one folder, mailbox or manager and can be shared selectively.
Why this matters
In pool environments, the selected product matters, but so does the ability to substantiate the choice, delivery and follow-up later. A coherent record supports careful management, accelerates handover and helps demonstrate which materials and documents belong to a project.
Documentation supports the duty of care and helps demonstrate decisions made. It does not replace project-specific assessment, expert inspection or legal responsibility.
From production to verification
01
Material and product recorded
02
Delivery and standards connected
03
Order and project traceable
04
Record available on site
05
History ready for review
Discuss the documentation and product information your project needs with PoolFIX.
Every building or facility has different challenges, colours, materials or new innovations. PoolFIX is happy to help deliver durable, safe suspension materials for your unique project!
Renovation or new construction both bring different challenges. When you inform us in time about the work or ask for advice at an early stage, we can help you with the right material choice without availability stress. Due to our wide assortment, we can deliver quickly from stock.
The use of stainless steel A1, A2, A4 or A5 (304/316) fasteners is prohibited due to susceptibility to stress corrosion. The best alternative for a durable connection is to choose PoolFIX fasteners. However, these coated articles are not resistant everywhere. In splash zones and below the waterline, material 1.4529 is used. PoolFIX supplies both materials with certificate so you are assured of a safe choice.
Metal suspension structures and fasteners in swimming pools
The NEN 9200:2025 replaces the earlier NPR 9200:2015 with a higher status as a full NEN standard. It specifies which metals are suitable for suspension structures and fasteners in indoor swimming pools. A2 and A4 grade stainless steel (304/316) is explicitly not permitted.
Operators of public swimming pools are responsible for establishing and periodically executing an inspection plan. The standard applies to both new construction and existing pools. All applied materials must be traceable and properly certified.
“Since 2022, the Quality Assurance Act is in effect: stricter building supervision for new construction and renovation.”
Since 2022, the Quality Assurance Act is in effect: stricter building supervision for new construction and renovation. If there are defects, the client can force the contractor to repair the errors. Even if the client discovers these errors later.
For operators and managers of public pools this means: ensure fasteners in your facility demonstrably comply with NEN 9200:2025. Certified materials with full traceability provide your certainty at every inspection.
See the Government Gazette for Building Decree regulation by Minister Blok.
Letter to members of parliament regarding safety in Dutch indoor swimming pools.
Methodology for inspecting and assessing stainless steel components.
Stainless steel is like a canary in a coal mine; chloramine toxic gas levels are exceeded many times in swimming pools.
Since July 1, 2016, swimming pools are legally obliged to investigate the presence of stainless steel fasteners.
Minister's regulation published, amendment to the Building Decree regarding swimming pool safety.
Practical knowledge pages for municipalities, architects, contractors and legal experts — with direct access to the generator.
Norm-based search terms, materials per zone, certification.
Read moreTender-ready specification that limits liability and ensures uniformity.
Read moreWho is liable in case of failure? Prevent disputes with an explicit specification.
Read morePool FIX B.V.
Rivierkade 9A
4931AA
Geertruidenberg
The Netherlands
BTW: NL86 1224 383 B01
KVK: 77988957
BOIP: 1350444
Telefoon: 0162-69 57 58
Email: info@poolfix.nl
FOR THE ENTIRE PROJECT CHAIN
Gain insight into applied materials, certificates and history.
Know which material belongs in which location.
Use products with clear application guidelines.
Document material choices made in a demonstrable way.
Include corrosion risk in design and specification.
Link findings to location, material and project history.
FREQUENTLY ASKED QUESTIONS
POOLFIX® MATERIAL SAFETY
Inspect existing fasteners or let PoolFIX help with material selection for a new swimming-pool project.
