Arkansas Code
Subchapter 1 - General Provisions
§ 17-38-106. Water distribution piping under concrete slabs

(a) Inaccessible water distribution piping under concrete slabs may be cross-linked polyethylene PEX (SDR9) pipe.
(b) Cross-linked polyethylene PEX (SDR9) pipe shall meet ASTM F-876/F-877 and NSP standards 14 and 61.