Rubber sphere, no. DM 57, diameter 57 × hole diameter 15
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The black anti-limescale NR rubber ball is a high-quality replacement part designed to ensure reliable, long-lasting seals in flush mechanisms and valves of sanitary systems. Made of black NR rubber (natural rubber), this ball stands out for its anti-limescale properties, which significantly reduce its tendency to accumulate limescale deposits on the surface—an important advantage for extending its efficiency and service life, especially in areas characterized by particularly hard water. In addition, the ball is chlorine-resistant, making it suitable for continuous contact with treated drinking water and common sanitation products without premature deterioration. As a sealing element inside valves and flush devices, the ball ensures an airtight seal thanks to the elasticity of the rubber, which allows it to adapt perfectly to the sealing seat and prevent dripping and water leaks. With a diameter of 57 mm and a 15 mm hole, this replacement part is sized to fit the most common mechanisms, offering a reliable and economical alternative for system maintenance. Its combined resistance to limescale and chlorine is an added advantage over traditional balls, ensuring consistent performance over time. We recommend replacing the ball at the first signs of wear or hardening, in order to maintain a perfect seal and reduce water waste.
Technical specifications:
- Material: black NR rubber (natural rubber)
- Treatment: anti-limescale
- Chlorine-resistant
- Diameter: 57 mm
- Hole diameter: 15 mm
- Application: sealing element for valves and flush mechanisms