C900, C905, Sewer, and MJ Gaskets: Durable Seals for Waterworks Applications

Rubber gaskets may be small components, but they perform one of the most critical functions in any pipeline system. In municipal water and wastewater applications, the right gasket can mean the difference between a reliable seal and costly downtime.
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At Prabhat Industries, we specialize in engineered rubber gaskets designed to keep PVC and ductile iron systems leak-free, efficient, and dependable. Every gasket we produce reflects precision in material selection, molding, and manufacturing quality—factors that directly determine field performance and service life.

What Are Rubber Gaskets?

Rubber gaskets are flexible sealing components placed between two pipe or fitting surfaces to prevent leaks and maintain system pressure.

When compressed, the gasket deforms slightly to fill gaps and surface irregularities, creating a secure, watertight seal. This flexibility also helps the joint absorb vibration, thermal expansion, and pressure fluctuations—ensuring long-term reliability in demanding field conditions.

Unlike flat gaskets, the rubber gaskets used in waterworks systems are profile-molded to fit directly into pipe bells or couplings. These precision-engineered designs ensure consistent sealing performance and simplify installation.

Common Rubber Gasket Types We Supply 

C900 & C905 Rieber Style Gaskets
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Designed for PVC pressure pipe, these self-restraining gaskets form an integral seal within the pipe bell. The Rieber-style design ensures uniform compression and consistent sealing performance without requiring additional components. 

Sewer Rieber Style Gaskets

Used in non-pressure sewer and drainage systems, these gaskets provide a watertight seal that prevents infiltration and exfiltration in gravity-flow applications. They are typically manufactured from flexible elastomers formulated for wastewater compatibility.

Mechanical Joint (MJ) Gaskets

Used in ductile iron fittings, valves, and appurtenances, MJ gaskets provide a reliable seal under moderate pressure. They are widely used in potable water distribution and municipal infrastructure projects.
Each gasket is molded from high-quality elastomers and tested for resistance to water, ozone, and temperature variation—ensuring long-term durability in service.

Why Gasket Design Matters

Every connection in a water system depends on the integrity of its seal—and that begins with gasket design and manufacturing precision.

• Precision Fit: Each gasket is molded to exact dimensional tolerances, ensuring uniform compression and proper seating within the joint.
  
  
• Consistent Sealing Performance: Prabhat gaskets maintain their seal under fluctuating pressure and temperature conditions, enabling continuous system operation.
  
  
• Reduced Maintenance: Durable rubber compounds and precision molding reduce the need for frequent inspections or replacements.
  
  
• Reliable Installation: Rieber-style and mechanical joint profiles simplify assembly, reducing the risk of misalignment or joint failure.
  
  
• System Integrity: A dependable seal prevents leaks, protects against pressure loss, and safeguards surrounding infrastructure from corrosion and contamination.
  
  

Precision-Crafted Gaskets for Waterworks Systems

At Prabhat Industries, every gasket is engineered for performance and longevity. Our products help utilities and contractors build leak-free PVC and ductile iron systems that stand the test of time.

With consistent quality, advanced molding technology, and proven rubber formulations, Prabhat gaskets deliver dependable sealing—connection after connection.

Contact us today to learn more about our C900 & C905 Rieber Style, Sewer Rieber Style, and Mechanical Joint gaskets, and discover how Prabhat can help you achieve lasting reliability in every system.