Gripper™ Restraining Gaskets — FT Series

Used to instantly restrain American Fastite®¹ push-on ductile iron pipe, valves, and fittings. The gasket design includes stainless steel teeth that automatically provide restraint upon installation. These gaskets eliminate nuts, bolts, clamps, thread rods, retainer glands, concrete thrust blocks and expensive labor associated with conventional restraining methods.

Multiple sizes from 4" to 12"


  • Teeth: Stainless Steel (2 or 3)
  • Gasket: SBR Rubber

1. "American Fastite® is a registered trademark of American Cast Iron Pipe Company. Gripper Gasket LLC is not affiliated in any way with American Cast Iron Pipe Company."

Gripper Gasket FT Series Installation Instructions


NSF/ANSI 61 View
ANSI/AWWA C111/a21.11 View
Gripper Gasket FT Series SubmittalView

Certified to NSF/ANSI 61 by NSF International

Boltless restraining gaskets (similar to Field Lok 350®)¹ shall be rated 350 p.s.i. and tested in accordance with ANSI/AWWA C111/a21.11

Styrene Butadiene Rubber (SBR) is our standard rubber compound. EPDM gaskets available upon request.

Made in the U.S.A.

Gripper™ Restraining Gaskets are manufactured in the U.S.A.

  1. Made in the U.S.A.
Special Notes Regarding The Use of Gripper Gasket

FT Series

A-PIPE OD B-PIPE OD C-DEPTH OF SOCKET MAX JOINT DEFLECTION ANGLE WEIGHT MAX Coupling OD Range min MAX Coupling OD Range max Larger Pipe ID min Larger Pipe ID max Smaller Pipe ID min Smaller Pipe ID max Sewer Main Wall Thickness Lateral Pipe min Lateral Pipe max Core Drilling min Sewer Main Core Break min Sewer Main Core Break max Foam Qty Required DIM. A DIM B DIM C DIM D DIM E DIM F Weight Pressure Resistance GG Part Part

FT Series

GG PartPartDescriptionCase Qty.Case Wt.
FT4150054" American Fastite®¹ ductile iron pipe, valves & fittings10.50 lbs
FT6150106" American Fastite®¹ ductile iron pipe, valve & fittings10.74 lbs
FT8150308" American Fastite®¹ ductile iron pipe, valves & fittings11.25 lbs
FT101504010" American Fastite®¹ ductile iron pipe, valves & fittings11.50 lbs
FT121505012" American Fastitie®¹ ductile iron pipe, valves & fittings11.80 lbs