scope:

General

This Standard specifies requirements for the installation of SDR 9 CTS crosslinked polyethylene (PEX) tubing and fittings, including cold‐expansion, crimp, press, push‐fit, and mechanical compression fittings, intended for hot‐ and cold‐water distribution systems within buildings.

This Standards applies to,

(a) SDR 9 CTS PEX tubing complying with ASTM F876 or CSA B137.5 and pressure‐rated in accordance with PPI TR‐3; and

(b) PEX fitting systems complying with

(i) ASTM F877, for mechanical compression fittings

(ii) ASTM F1807, ASTM F2159, or ASTM F2735, for metal or plastic insert fittings with copper crimp rings or stainless steel clamps (ASTM F2098);

(iii) ASTM F1960, for cold expansion fittings with PEX reinforced rings;

(iv) ASTM F2080, for cold expansion fittings with metal compression sleeves.

(v) ASTM F3347 or ASTM F3348 for metal or plastic insert fittings with stainless steel press sleeves; or

(vi) ASSE 1061 for Push‐fit fittings.

Terminology

In this Standard,

(a) "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy to comply with the Standard;

(b) "should" is used to express a recommendation, but not a requirement;

(c) "may" is used to express an option or something permissible within the scope of the Standard; and

(d) "can" is used to express a possibility or a capability.

Notes accompanying sections of the Standard do not specify requirements or alternative requirements; their purpose is to separate explanatory or informative material from the text. Notes to tables and figures are considered part of the table or figure and can be written as requirements.

Units of Measurement

SI units are the primary units of record in global commerce. In this Standard, the inch/pound units are shown in parentheses. The values stated in each measurement system are equivalent in application, but each unit system is to be used independently. All references to gallons are to U.S. gallons.