This Standard covers pipe alignment and secondary support systems and specifies requirements for materials, physical characteristics, performance testing, and markings.

Pipe alignment and secondary support systems covered by this Standard are intended for:

• residential and commercial applications; and
• above-ground and buried installations.

The requirements of this Standard are not intended to prevent the use of alternative materials or methods of construction provided such alternatives meet the intent and requirements of this Standard.

Proposals for amendments to this Standard will be processed in accordance with the standards writing procedures of IAPMO.

The user's attention is called to the possibility that compliance with this Standard may require use of an invention covered by patent rights. By publication of this Standard, no position is taken with respect to the validity of any such claim(s) or of any patent rights in connection therewith. If a patent holder has filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license, then details can be obtained from IAPMO.