npc home



The Industry Leader in Innovation and Outstanding Customer Service

NPC Inc. was established in 1972 with two guiding principles, outstanding customer service and innovation. For more than 35 years, NPC has supplied specialized products to the pipe and precast industry, water, sewer and public works contractors.

The Kor-N-Seal® pipe-to-manhole connector and Hydrokor® production coring machinery are preferred throughout the world for their dependability and performance. Our company's focus on customers serving municipal sanitary collection systems, stormwater and drainage systems continues to inspire innovation.

  • FlexRib® - Manhole Frame-Chimney Seals

  • Internal Joint Seal - Manhole and Pipe Joint Rehabilitation Seals

  • MAX - Diamond Core Drills

  • Bidco - Butyl Joint Sealants

  • CGA - Corrugated Plastic Pipe Adapters for Watertight Connections

The NPC Rehab Products line for pipe and manholes eliminates infiltration, while the CGA Corrugated Pipe adapter provides for a watertight connection between manholes and most types of HDPE corrugated pipe.