JCM Industrial Fitting Typical Specifications 01 12 2024

Product Specification

JCM 610 – 620 Restrainers – Nominal sizes 4” – 12”

Restraint for IPS PVC, C-900 PVC, Ductile Iron Pipe 4" - 12" and HDPE shall be provided by mechanical means separate from the mechanical joint gasket sealing gland. The restrainer shall provide wide, supportive contact around the full circumference of the pipe and be equal to the listed widths. Means of restraint shall be machined serrations on the inside surface of the restrainer equal to or greater than the listed serrations per inch and width. Loading of the restrainer shall be by a ductile iron follower that provides even circumferential loading over the entire restrainer. Design shall be such that restraint shall be increased with increases in line pressure. Serrated restrainer shall be Ductile Iron ASTM A-536-80 with a ductile iron follower; bolts and nuts shall be corrosion resistant, high strength alloy steel. The restrainers shall have a pressure rating of 350 PSI or equal to that of the PVC, HDPE or ductile iron pipe on which it is used, whichever is lesser, and be capable of withstanding a minimum test pressure of 2 times the pressure rating. Restrainers shall be JCM Industries Sur-Grip or equal.

Nominal Size

Restraint Width

Serrations per inch

4", 6”

1-1/2” 1-3/4”

8 8

8", 10", 12”

This typical specification, provided by JCM Industries, is a proposed guideline for use by specifying agencies to ensure significant design and material features of this product are included within the agencies’ individual specifications.


Effective 04.25.14

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