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Manufactured from High Density Polyethylene (HDPE), Smoothwall is intended for use in underground, aerial, and innerduct applications. Smoothwall offers superior protection, increase pathways of existing duct systems and alows extra channels for future cabling needs. Cable can be installed by pre-installed pull-rope or jetting.
The standard colors are black or orange, and offered in a variety of other colors. Sequential marked footage is standard. Custom options include up to four multiple colors per reel (up to 2") and pre-lubricated duct. Installation methods include plowing, open trench, directional boring or pulled through existing conduit.
Options include:
Smoothwall Innerduct is offered in custom lengths on collapsible steel reels or in straight lengths. A full line of couplers and terminal connectors are also available.
| Size | SDR | Min Wall (in.) | AVG OD (in.) | OD Smooth/ID Smooth (lb/ft.) | OD Smooth/ID Ribbed (lb/ft.) |
| 1/2" | 17 | 0.062 | 0.840 | 0.072 | 0.075 |
| 3/4" | 17 | 0.062 | 1.050 | 0.091 | 0.096 |
| 1" | 17 | 0.077 | 1.315 | 0.138 | 0.145 |
| 1-1/4" | 17 | 0.098 | 1.660 | 0.217 | 0.228 |
| 1-1/2" | 17 | 0.112 | 1.900 | 0.281 | 0.295 |
| 2" | 17 | 0.140 | 2.375 | 0.432 | 0.453 |
| 3" | 17 | 0.206 | 3.500 | 0.928 | 0.974 |
| 4" | 17 | 0.265 | 4.500 | 1.534 | 1.611 |
North Coast Conduit Innerduct is manufactured according to the following industry standards:
ASTM F 2160
Solid wall High Density Polyethylene (HDPE) Conduit based on Controlled Outside Diameter (O.D.).
NEMA TC-7
Electrical Plastic Conduit.
The resin properties meet or exceed the values listed below for HDPE:
| ASTM Test | Description | Values HDPE |
| D-1505 | Density g/cm³ | 0.941-0.955 |
| D-1238 | Melt Index, g/10 min Condition E | 0.05 - 0.50 |
| D-638 | Tensile strength at yield (psi) | 3000 psi min. |
| D-1693 | Environmental Stress Crack Resistance Condition B,. | F10> 96 hr. |
| D-790 | Flexural Modulus, MPa (PSI) | 80,000 min. |
| D-746 | Brittleness Temperature | -75°C |
