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The interference joint system consists of an integral bell and spigot. The spigot end has a buttress type, male thread for easy installation. The belled end contains the mating female threads. The tapered buttress threads make it easy to join while giving it a high pull out strength of 1,000 lbs. The joint is concrete tight but not water tight.
Interference Gasket Joint Iron Pipe Sizes (IPS) Straight Conduits
Unit of Measure
Items Interference Gasket Joint Iron Pipe Sizes (IPS) Straight Conduits
30C-SW-20-G
3 Inch (in) Nominal Size Standard Wall Iron Pipe Size (IPS) Aboveground Straight Conduit with Gasket Joint 		Interference Gasket Joint Iron Pipe Sizes (IPS) Straight Conduits
50A-MW-10-G
5 Inch (in) Nominal Size Medium Wall Iron Pipe Size (IPS) Belowground Straight Conduit with Gasket Joint 		Interference Gasket Joint Iron Pipe Sizes (IPS) Straight Conduits
60C-HW-20-G
6 Inch (in) Nominal Size Heavy Wall Iron Pipe Size (IPS) Aboveground Straight Conduit with Gasket Joint
Description N/A The interference joint system consists of an integral bell and spigot. The spigot end has a buttress type, male thread for easy installation. The belled end contains the mating female threads. The tapered buttress threads make it easy to join while giving it a high pull out strength of 1,000 lbs. The joint is concrete tight but not water tight.
Brands N/A Champion Fiberglass®, Inc.
Type N/A Iron Pipe Size (IPS) Aboveground Straight Conduit with Gasket Joint N/A Iron Pipe Size (IPS) Belowground Straight Conduit with Gasket Joint N/A Iron Pipe Size (IPS) Aboveground Straight Conduit with Gasket Joint
Nominal Size N/A 3 in76 mm N/A 5 in N/A 6 in152 mm
Wall Thickness N/A Standard Wall N/A Medium Wall N/A Heavy Wall
Average Outside Diameter N/A 3.500 in89 mm N/A N/A 6.654 in169 mm
Outside Diameter Tolerance N/A -0.018 in0.028 in-0.4 mm0.7 mm N/A N/A -0.028 in0.034 in-0.7 mm0.9 mm
Inside Diameter [Min] N/A 3.360 in85 mm N/A N/A 6.435 in163 mm
Nominal Wall Thickness1 N/A 0.070 in2 mm N/A N/A 0.110 in3 mm
Length (L) N/A 20 ft6.1 m N/A 10 ft N/A 20 ft6.1 m
Color N/A Black
Weight N/A 0.60 lb/ft0.83 kg/m N/A N/A 1.63 lb/ft2.43 kg/m
Industry Standards/Certifications N/A Underwriters Laboratories (UL), Canadian Standards Association (CSA) N/A Underwriters Laboratories (UL) N/A Underwriters Laboratories (UL), Canadian Standards Association (CSA)
Application N/A N/A Used for more protection in 5" & 6" N/A Used for increased protection in 4" - 8"
Features N/A Most Commonly used. N/A N/A Most Commonly used.
Gasket Joint (Triple Seal) N/A The gasket joint system consists of an integral bell and spigot. The belled end has a triple seal gasket in addition to the interference joint. The triple seal gasket fits into a permanent groove formed during the manufacturing of the conduit. Because of this design, thermoplastic retainer rings, which often fall out during cold weather, are not necessary. The triple seal gasket provides a water tight seal. When properly installed, the triple seal gasket in combination with the interference joint has a pull out strength of 2,000 lbs. Triple seal gasket without interference joint (e.g. after a field cut) has a pull out strength of 500 lbs.
General Information N/A Fiberglass Conduit Specifications for Use Below Ground

The conduit shall be fiberglass conduit, also known as Reinforced Thermosetting Resin Conduit (RTRC), manufactured using the single circuit filament winding process. Multi circuit windings are not allowed. The conduit shall have a winding angle as close as possible to 54.75 degrees.

The resin system shall be epoxy based, with no fillers, using an anhydride curing agent. The fiberglass shall consist of continuous E-glass roving. The conduit shall not contain any halogen compounds containing chlorine, bromine, fluorine and iodine in more than trace amounts when burning.

Conduit and elbows shall be manufactured from the same resin/hardener/glass systems manufactured by the same filament wound system.

Fiberglass conduit fittings and accessories shall be manufactured using one of two manufacturing procedures. The first method shall use the same process, methods, and components as used to manufacture the fiberglass conduit. The second method shall use the compression molding process, Sheet Molding Compound (SMC), for the manufacture of the finished component. The SMC material shall be a vinyl ester resin with +30% reinforcement of glass. The glass fibers should be approximately 1" in length. The SMC material shall be fire resistant to UL 2515.

Conduit shall be integral bell and spigot or bonded coupling and spigot.

Conduit, elbows and fittings are specified for use throughout a temperature range of -60ºF (-51ºC) to 250ºF (121ºC).

Manufacturer shall have a current Certificate of Compliance, issued by an independent and accredited company, with an ISO 9001:2008 Quality Management System.
  • 1 Actual wall thickness is that required to meet the performance requirements for specifications. Other wall thicknesses are available by special request.