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STEPEN is privately owned enterprise, founded in 1992 for the purpose of becoming a successful family business in sphere of construction industry. From its very foundation the enterprise STEPEN has developed dynamically, following modern technologies. Years of installation work are behind us, via which we have acquired knowledge and experience, which gives us that small yet very important edge when compared to other companies. With an offer of top quality equipment and highest level of service, we can safely say that we are one of the leaders on the market.



Polyvinyl Chloride or PVC is a thermoplastic material derived from common salt and fossil fuels. This pipe material has the longest track record of all plastic materials. Polyvinyl chloride (PVC) was discovered late in the nineteenth century. Scientists observing the newly created chemical gas, vinyl chloride, also discovered that when the gas was exposed to sunlight, it underwent a chemical reaction (now recognized as polymerization) resulting in an off-white solid material. But, the solid material was so difficult to work with that it was cast aside in favour of other materials. Years later in the 1920s, rubber scientist Waldo Semon was hired by the company BFGoodrich to develop a synthetic rubber to replace increasingly costly natural rubber. His experiments eventually produced polyvinyl chloride. Although product developers began to use PVC in a variety of ways – in shoe heels, golf balls, and raincoats, to name just a few – its application increased significantly during World War II. PVC turned out to be an excellent replacement for rubber insulation in wiring and was used extensively on U.S. military ships. After 1945, its peace-time usage exploded.

PVC piping is the most widely used plastic piping material. The first PVC pipes were made in the 1930’s. During the 1950’s, they were used to replace corroded metal pipes and thus bring fresh drinking water to a growing urban population. Pipe and fitting material made with PVC compounds meet the requirements of ASTM D-1784 standard, class 12454-b, ratified as type I, 1 class and EN 1452 (for PVC-U). It is used successfully for more than 50 years in the fields of chemical processing, industrial installations, cold water distribution, deionized water supply, chemical drainage systems, and irrigation systems. Further pressure and non-pressure applications in the field of sewers, soil and waste, gas (low pressure) and cable protection soon followed. The material’s contribution to public health, hygiene and well-being has therefore been significant.


Chlorinated Polyvinyl Chloride (CPVC) is a thermoplastic pipe and fitting material made with CPVC compounds meeting the requirements of ASTM Class 23447 as defined in ASTM Specification D1784 and EN-ISO-15877 (for PVC-C). It endures the pressure up to 138 bars, and the maximal temperature up to 100°C. In the last 45 years, it is proven as an excellent material for hot and corrosive fluids, hot and cold water, it is jointed with gluing (CPVC cement), the so-called cold welding.

FlowGuard Gold® pipe and fittings are made from a specialty plastic known chemically as chlorinated polyvinylchloride (CPVC). FlowGuard Gold® CPVC is the result of new technology that insures increased product toughness year round. FlowGuard Gold® water distribution systems are assembled with readily available, inexpensive tools. Solvent cemented joints - proven with more than 45 years of successful service history - assure the reliability of a FlowGuard Gold® plumbing system.

With proven performance in homes, condominiums, apartments and hotels worldwide, a FlowGuard Gold® plumbing system is the superior choice for millions of satisfied homeowners. So why settle for metal pipe? The advantages of a FlowGuard Gold water distribution system are clear. Insist on the superior quality of pure gold. FlowGuard Gold pipe and fittings! CPVC systems are ideal for all potable water piping requirements in typical residential (single and multi-family), motel/hotel, mobile home, manufactured housing, light commercial, and institutional structures. CPVC piping systems have been installed and operated since 1959, and initial installations are still performing faultlessly. Since its development, more than billion meters of CPVC pipe has been installed in homes, condominiums, buildings, apartments and hotels, including 12 million homes. CPVC piping will not fail prematurely due to corrosion, electrolysis, or scale build-up in areas where water, soil, and/or atmospheric conditions are aggressive.



Whilst fresh air is free, air under pressure or compressed air is not. The compressed air distribution network is all too often a cause of leaks and load losses. The actual cost of compressed air therefore depends directly on the type of distribution circuit.

Increased compressed air costs

Although the compressor acts as the real motor in the assembly, in reality it is generally not this item which is the most expensive. Other essential factors must be taken into account when drawing up an objective analysis of the network: - air quality - required working pressure – type of network - air losses - choice of material. Apart from poorly designed networks requiring more powerful compressors, air leaks are all too often present throughout the system and in some cases can absorb nearly 50% of the compressor’s production, wasting both energy and money. But is this tolerable? On an older network, leaks or the like are in abundance. After a time, the compressor becomes out of breath and is replaced with a more powerful one. Do you believe that this is the correct way to solve this problem without effectively dealing with the causes?

Productivity and savings

To obtain the optimum efficiency from a network, apart from the ultra-fast assembly aspect, four criteria are absolutely essential:

  • Intelligent and suited design: low or even zero load loss
  • Perfect sealing: no leaks
  • Clean air with constant quality: protected tooling
  • No corrosion: longevity and maintenance savings.


Polyethylene of Raised Temperature Resistance (PE-RT) is a resin that builds on the traditional properties of polyethylene, combined with the latest technology (constrained geometry catalyst, solution process and ethylene-octene copolymer) to add extra performance characteristics such as enhanced strength at high temperatures. The family of DOWLEX™ PE-RT Resins has a proven track record of more than 25 years for delivering outstanding performance in pipe applications. MULTITUBO PE-RT/AL/PE-RT is manufactured in Germany and DOWLEXTM PE-RT resins and Dow adhesives are used in the production process.

In multilayer pipes, the separate layers are usually bonded using an adhesive with superior performance and excellent processing characteristics. For polyolefins, those adhesives typically consist of functionalized polyolefins which adhere well to the polyolefin layer and bond via their functionality to polar layers. It's important that the adhesive is properly prequalified as the application characteristics, the possibility of extrusion and other properties can vary quite substantially. Some adhesives perform well at room temperature, for instance, but because of their chemical structure or molecular weight distribution, may suffer dramatic losses in peel adhesion values at higher temperatures. Depending on the technical demands the selection of the right adhesive to perform in an application can make the difference to whether the final product can meet the requirements or not. Another important aspect is the stabilization package of the adhesive. The application for hot and cold water is typically at higher temperatures. In order to prevent an early degradation of the adhesive, it needs to be properly stabilized and the components need to be compatible with the stabilization package of the PE resin. A good quality adhesive is not an optional extra - it is essential to the performance of the whole multilayer pipe, because unless the aluminium becomes one with the inner layer it cannot perform properly.

DOWLEX™ PE-RT resins which MULTITUBO uses in manufacturing, have been tested according to the ISO 9080 standard for long-term hydrostatic strength and fulfil the requirements for hot water applications according to ISO 10508 for all classes. However, defined by ISO 2578, there is an additional method available for the crucial outer layer that determines time-temperature limits after prolonged heat exposure. To meet its requirements, it must be proved in a heat aging oven test that the elongation at break of the material is more than 25% of the original value after a full year testing. Recent 12 month tests have confirmed that DOWLEXTM PE-RT resins outperform this minimum prerequisite by a considerable margin. This is an achievement which throws down a challenge to alternative outer-layer materials which cannot boast similar performance. Unlike MULTITUBO, some multilayer pipe manufacturers use another raw material for the outer layer in order to save, for example PEHD/HDPE, the so called alkathene or polythene pipe. In 2005, DOWLEX™ PE-RT resins systems were awarded a European Technical Approval – signified by the “CE” mark quality standard. This was the first time any pipe system had been awarded an ETA.


The system is especially fit for commercial and industrial cooling. Thanks to a great range of pipes (diameters from Ø20 to Ø200), fittings and kits, KRYOCLIM® enables assembly of all types of commercial and industrial cooling devices and air-conditioning machine networks from -30C° to +40°C. KRYOCLIM® may never be used with HFC, HCFC and CFC. KRYOCLIM® system is compatible with most anti-freeze liquids. It is suitable for assembling cooling systems in existing buildings with minimum disturbance since there are no open flames or noises.  Since KRYOCLIM® is much lighter than a metal pipe, assembly is quick and clean. It is quick and easy to set up. It does not require special tools, electricity or fire permits. When an area becomes available, work may start immediately. It is classified as M1 by the CSTB. KRYOCLIM® is not flammable, thus ensuring safety in case of fire. KRYOCLIM® system which is made of HPF is fully recyclable.

Cooling systems in public buildings:

Today many European countries have clearly stated that the pipes used for transfer of cooled liquids in buildings open to public must be non-flammable. The goal is to ensure greatest safety in case of fire and to limit public panic. With its non-flammable material, KRYOCLIM® offers a solution for these demands.

Main applications

Centralized applications in cooling devices:
  • Cooled water only (pleasant cooling)
Industrial applications:
  • cooling
  • process
Cold storages:
  • industrial kitchens
  • food processing industries


When it comes to fire protection, you need a pipe system you can rely on. CPVC pipes and fittings that we present have been especially designed for fire protection systems and are based on more than 40 years of confirmed experience. This system elevates the fire protection systems to a level of superior characteristics which exceed your expectations. This fire protection system is the most advanced, current and approved plastic pipe system available on the present market. Metal pipes may not be compared to them. CPVC systems have much more advantages in relation to metal systems, and all other systems are outdated compared to them.


Pay attention to the following facts:
  • NSF certificate, safe for potable water, according to all standards.
  • Peeling and corrosion are eliminated even in environments where greater amount of salt in the air is present.
  • Natural resistance to corrosion caused by microbiological influences (Microbiologically Influenced Corrosion).
  • Superior characteristics of the flow enable better hydraulic solution in relation to metal systems.
  • Easy assembly at the field, incomparable flexibility, small weight, easy installation.
  • Muffled vibrations.
  • High aesthetic qualities of assembly – hard pipes.
  • Minimum or no investment in tools (no special tools) leads to great savings.
  • Minimum duration of 50 years, with safety factor two.
  • Quality Assurance Program guarantees consistency and reliability.
  • Patented CPVC formula, strict control of raw materials and manufacturer of pipes and fittings.


Valves are used in pipe systems to control flow of the liquid. They are produced in various forms and from different materials. Adequate choice of valves is very important in order to obtain a system that is maximally secure and efficient, has affordable price and lasts for a long time.

Proper functioning of all components is important in complex fire protection systems that protect lives and property. Valves used in fire protection systems are not an exception, NIBCO fire protection valves are certified by UL/FM, which guarantees quality and reliability.

Underwriters Laboratories Inc. (UL) is independent, non-profitable organization that tests security of products and issues certificates. For more than a century it has been testing safety of products intended for general public. Each year, more than 16 billion UL labels are put to products all over the world.

Factory Mutual Research Corporation (FMRC) is an agency that tests insurance companies. Factory Mutual Research works with commercial and industrial clients for the purpose of solving issues via unique interaction by our three work units: Standards, Research and Certification of products (Approvals). Results of the research set new standards that improve loss prevention practice and aid in development of new products. Besides that, producers use services of independent test laboratory Factory Mutual Research in order to receive approval that confirms reliability of their products and services.

A product with UL and FM certificate is guaranteed for supreme quality and reliability.

STEPEN - kontrola protoka

STEPEN is privately owned enterprise, founded in 1992 for the purpose of becoming a successful family business in sphere of construction industry. From its very foundation the enterprise STEPEN has developed dynamically, following modern technologies.