CNI Manufacturing Inc.
15627 Arrow Highway
Irwindale CA, 91706
Hours of operation: Monday - Friday 07:00am to 03:30pm
Phone: (626) 962-6646
Fax: (626) 962-4854
Out of State: (800) 426-4634

Replacement Gaskets- All gaskets are low swell, high nitrile Buna N Rubber


*KEY: Insert Gasket application size in __ EXAMPLE* (MH36-1GSK), (MH12-7GSK) etc.


#1: Part number: MH__3GSK 1/8" x 3/4" Flat Gasket    Used on: Steel retrofit (out of state), square manholes

#2: Part number: STP-4 Snap Tight Cover Gasket    Used on: Snap     Tight     Cover

#3: Part Number: MH__7GSK 3/8" x 1/2" Rectangular gasket       Used on: 37" Steel Ring

#4: Part Number: MH__2GSK 3/8" x 1/2" Radius rectangular gasket   Used on: E/Z Lift's and ductile iron ring manholes

#5: Part Number: MH__5GSK 1/4" Diameter O-Ring Gasket    Used on: Old style ductile     ring

#6: Part Number: MH__1GSK 3/8" Diameter O-Ring Gasket    Used on: Old style ductile     ring

#7: Part Number: MH__4GSK L Shaped gasket    Used on: Steel retrofit (California Only)