FM Approvals 1613 encompasses the design and performance requirements for NPS (Nominal Pipe Size) 4 in. through 36 in. nominal size PE pipe and fittings for use in underground fire service mains. Other sizes may be considered for Approval on a case-by-case basis.

In cases where metric sized PE pipe and fittings are to be examined for Approval, test criteria comparable to the United States equivalent size shall be used.

FM Approvals will consider PE pipe and fittings which are designed in accordance to national or international standards. Only after verification is made that the products to be reviewed are in conformance to ANSI/AWWA C906 or other nationally or internationally recognized standards will Approval testing commence. All Approval testing is to be conducted on production samples.

Approval Standards are intended to verify that the product described will meet stated conditions of performance, safety and quality useful to the ends of property conservation.