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Schedule 40 is the most common. It's a rigid nonmetallic conduit used above and underground.
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Schedule 80 is similar with a heavier wall and is mainly used in applications where severe physical conditions may exist, such as risers, heavy industrial applications, etc.
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Both Schedule 40 & Schedule
80 are
offered in 10ft & 20ft lengths in sizes ranging from 1/2 - 6 inches
in diameter.
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EB-20 TC-6 (Encased Burial Duct) is rigid nonmetallic conduit used underground for concrete encasement in outdoor trenches and used in outside concrete encased applications only.
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EB-35 TC-8 (Encased
Burial Duct) is similar and used in areas where heavier loading
in concrete encasement is anticipated.
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DB-60 TC-6 (Direct Burial) is rigid nonmetallic conduit used underground for direct burial without encasement in concrete.
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DB-120 TC-8 (Direct
Burial) is similar and used where extra protection is required in direct
burial applications.
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As a standard both EB & DB pipe are sold in 20ft lengths and in
wholes sizes ranging from 2 - 6 inches in diameter. (10ft lengths are
available upon request)
