DB-120 PVC Conduit | Heavy Wall | Direct Burial & Encasement | 20' Bell End

DB-120 PVC Conduit | Heavy Wall | Direct Burial & Encasement | 20' Bell End — Product Overview

Prime Conduit DB-120 Heavy Wall P&C Duct is a nonmetallic conduit made from Prime's high-modulus PVC compound, developed for power and communications work. Prime designs Type DB for direct burial or concrete-encased installations, and it is rated for use with 90°C cable.

DB-120 is the heaviest wall in Prime's P&C Duct range, at a minimum pipe stiffness of 120 lb/in/in. Prime notes that the heavier DB-120 wall is commonly installed in a duct-to-duct formation, and that where limited loads occur this has proven satisfactory. Every 20-foot stick carries one factory-formed bell end for a fast, secure solvent-weld joint.

Sold by the foot in whole bundles. Each size ships in the bundle footage shown in the table below, and orders are placed in multiples of it — one bundle, two bundles, and so on. Partial bundles are not available.

Which Duct Series Do I Need?

Pipe stiffness is the NEMA TC-6 & 8 / ASTM F-512 minimum for the series — a higher number means a heavier wall and more crush resistance. Important: Prime rates Type EB for concrete-encased installations; Type DB is the series rated for direct burial. DB-120 and DB-120 Utility both meet the DB-120 class, but Prime relates the Utility wall to a 400,000 modulus against 500,000 for standard DB-120. Burial depth, cover and duct-bank requirements are set by your local authority having jurisdiction — confirm the series with your inspector or our sales team before ordering.

Key Features

• 120 lb/in/in Pipe Stiffness: The heaviest wall in Prime's P&C Duct range, for the highest crush resistance in buried and encased runs.
• Direct Burial or Encasement: One duct for either installation method, per Prime's published rating.
• Duct-to-Duct Capable: Prime notes the heavier DB-120 wall is commonly used in duct-to-duct formation where limited loads occur.
• Bell-End Connections: One factory-formed bell per 20-foot stick for fast solvent-weld joints, with no separate couplings.
• 90°C Cable Rated: ASTM F-512 and NEMA TC-6 & TC-8 compliant.
• Sold by the Foot in Whole Bundles: Order in multiples of the bundle footage shown in the specification table.

DB-120 Dimensions & Specifications

All sizes on this listing are 20-foot bell-end sticks. Weights, outside diameters, minimum wall thicknesses and bundle quantities are Prime Conduit published values from the P&C Duct catalog. Bundle quantity is the order increment for that size — for example the 6" is ordered as 520 ft, 1,040 ft, 1,560 ft and so on.

Not Seeing the Size or Length You Need?

Prime also produces DB-120 in a 10-foot stick in 6" (part 68817-010, 260 ft bundle), and makes P&C Duct in sizes and wall classes beyond what is listed here across the DB, EB and Utility series. If the size, wall class or stick length you need is not shown, call us at (815) 337-8845 or use the quote request on this page and we will price it for you.

Matching DB-120 Sweeps

All DB-120 sweeps are belled and meet NEMA Standard TC-9. Prime notes that sweeps 72" and larger may ship in segments — consult us for specifics on long-radius bends.