Colonial TelTek
Colonial TelTek
201 W. Church Road
King of Prussia, PA 19406
Phone: (855) 686-7713
Email: Info@colonialteltek.com
Website: www.knobsource.com
Print Back
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 Joint Tubular Size (ID) Straight Conduits
Unit of Measure
Items Interference Joint Tubular Size (ID) Straight Conduits
25D-SW-20-I
2 1/2 Inch (in) Nominal Size Standard Wall ID Aboveground Straight Conduit with Interference Joint 		Interference Joint Tubular Size (ID) Straight Conduits
60B-SW-20-I
6 Inch (in) Nominal Size Standard Wall ID Belowground Straight Conduit with Interference 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.
Brand N/A Champion Fiberglass®, Inc.
Type N/A ID Aboveground Straight Conduit with Interference Joint N/A ID Belowground (Tubular) Straight Conduit with Interference Joint
Nominal Size N/A 2 1/2 in64 mm N/A 6 in152 mm
Wall Thickness N/A Standard Wall
Average Outside Diameter N/A 2.640 in67 mm N/A 6.140 in156 mm
Outside Diameter Tolerance N/A -0.018 in0.028 in-0.4 mm0.7 mm
Inside Diameter [Min] N/A 2.52 in64 mm N/A 6.000 in152 mm
Nominal Wall Thickness1 N/A 0.070 in2 mm
Length (L) N/A 20 ft6.1 m
Color N/A Black
End Type N/A Bell End
Weight N/A 0.42 lb/ft0.63 kg/m N/A 1.02 lb/ft1.52 kg/m
Industry Standards/Certifications N/A Underwriters Laboratories (UL), Canadian Standards Association (CSA)
Features N/A Most Commonly used.
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.