Cast iron fittings and connectors
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Cast iron fittings and connectors - essential elements of water installations
Cast iron fittings and connectors are a key element of water and sewage systems. In our offer you will find a wide selection of these products. They are essential for the construction of durable and reliable installations. Our experience shows that properly selected elements guarantee long-term operation.
We offer various types of fittings and connectors. The assortment includes:
- Flanged elbows for water
- Water foot elbows
- Flanged water tees
- Flanged reducers for water
- Water blind flanges
- Pipe-flange connectors
Each of these elements performs a specific function in the system. Selecting the appropriate fittings and connectors is crucial for the efficiency of the entire installation. Our products are characterized by high quality of workmanship. They ensure tightness and durability of connections.
Types of cast iron fittings and connectors available in our offer
Our range includes products from renowned brands. We offer products from companies such as Bohamet - Armatura, Hawle, Aeon and Geldbach. Additionally, we offer our own brands: Onnline, Fxa and Ironside. They guarantee an optimal price-quality ratio.
Flanged fittings are the basis of many water installations. Flanged elbows allow you to change the flow direction. Tees, on the other hand, allow you to branch the pipeline. Flanged reducers are used to change the diameter of the pipe. Each of these elements has its specific application.
Pipe-flange connectors are versatile elements. They enable the connection of pipes made of different materials. Our offer includes, among others:
- RK connectors for PE and PVC pipes
- RK-E connectors for PE pipes
- RK SYNOFLEX connectors for steel, cast iron, PE and PVC pipes
Each of these connectors has its own unique properties. The selection of the appropriate type depends on the specifics of the installation. Our advisors will be happy to help you choose the optimal solution.
Criteria for selecting cast iron fittings and connectors
Choosing the right fittings and connectors is not an easy task. It requires taking into account many factors. The most important criteria include:
Nominal diameter (DN) is a key parameter when selecting components. It must correspond to the diameter of the pipes in the installation. An incorrectly selected diameter can lead to flow problems. In our offer you will find elements with different nominal diameters.
Nominal pressure (PN) is another important factor. It determines the maximum working pressure that a given element can withstand. Selecting fittings and connectors with the appropriate PN is crucial for the safety of the installation.
The type of medium also influences the selection of elements. Water supply and sewage installations have different requirements. Our products are appropriately marked for their intended use. This makes it easier to select the right components for a specific application.
The operating conditions of the installation are another aspect to consider. Temperature, humidity or exposure to chemical factors affect the selection of materials. Our fittings and connectors are adapted to various operating conditions.
In our daily practice, we encounter various challenges. Recently, in a project for a large industrial plant, we faced a difficult task. It was necessary to connect the existing steel installation with a new network of PE pipes. The use of RK SYNOFLEX connectors allowed for the trouble-free execution of this connection.
The correct selection of cast iron fittings and connectors is crucial for the durability and reliability of the installation. Our experience shows that investing in high-quality components pays off in the form of trouble-free system operation. That is why we always recommend using products from renowned manufacturers.
When upgrading older installations, the question of compatibility often arises. Our customers wonder whether new elements will fit into the existing infrastructure. Thanks to our wide range of products, we are able to select the right solutions. Adjustable length connectors or transition fittings allow for easy connection of different systems.
Many customers ask us about the durability of cast iron fittings and connectors. In our experience, these products are exceptionally resistant to corrosion. When properly installed and operated, they can last for decades. This makes them an ideal choice for critical infrastructure.
At Onninen we attach great importance to the quality of the products we offer. All cast iron fittings and connectors in our offer undergo rigorous testing. This guarantees their reliability even in the most demanding applications. Our customers can be sure that they receive top-class products.
We often come across questions about the possibilities of using cast iron fittings and connectors in new technologies. Contrary to appearances, these elements work great in modern installations. Their durability and versatility allow for integration with advanced control and monitoring systems.
In the case of large infrastructure projects, product availability is key. Our company ensures quick execution of even the largest orders. Thanks to our extensive logistics network, we are able to deliver the necessary elements in a short time. This allows our clients to efficiently implement their investments without delays.
Cast iron fittings and connectors are not only technical elements, but also an important factor influencing the economic efficiency of the project. The right selection of these components allows for the optimization of operating costs. Lower failure rates and longer service life of the installation translate into measurable savings in the long term.
We invite you to contact our technical advisors. They will help you choose the best solutions for your project. Thanks to their extensive experience and extensive knowledge, they are able to offer the best cast iron fittings and connectors for each application.




























