3" Corex External Coupling

Manufacturer Part

Accuracy of the images may vary. Refer to the specifications table to ensure precision.

Advanced Drainage Systems is the world’s largest producer of corrugated HDPE pipe and related drainage products. ADS serves the storm and waste water industry through a global network of 56 domestic and international manufacturing plants and 27 distribution centers. In addition to its flagship N-12 pipe, the company offers a complete line of fittings and other accessories including, Nyloplast drainage structures, and various geotextiles. This 3 in. External Snap Coupling is built from durable HDPE to withstand elements while connecting pipes in residential drainage applications.


  • HDPE material is strong and durable but lightweight
  • Use in residential drainage applications to join two lengths of 3 in. pipe
  • 1 piece molded design makes a secure, leak-resistant joint
  • HDPE material resists corrosion and weather damage lasts longer than materials
  • Underground rated
Key Specs
Length 8"
Width 3"
Height 4"
Manufacturer ADS
Manufacturer Part Number 0312AA
Shipping Height 4"
Shipping Length 8"
Shipping Weight 5lbs
Shipping Width 3"
Ship Class UPS