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SECTION 3 <br /> WATER SERVICES <br /> POLYETHYLENE ( PE) TUBING & PRESSURE PIPES <br /> 3 . 01 SCOPE FOR POLYETHYLENE TUBING <br /> This section covers polyethylene pipes and fittings for water services . <br /> 3 . 02 POLYETHYLENE TUBING 3 INCHES IN DIAMETER AND SMALLER <br /> A . Polyethylene tubing shall comply with applicable requirements for <br /> PE 3408 extrusion compound polyethylene plastic material as <br /> stated in AWWA Standard Specifications C901 -96 , or latest <br /> revision , and shall comply with the following : <br /> 1 . Tubing shall have a working pressure of 200 psi at 73 . 4° F. <br /> 2 . Tubing surfaces shall be glass smooth , and shall be free <br /> from bumps and irregularities . Materials must be <br /> completely homogeneous and uniform in appearance . <br /> 3 . Tubing dimensions and tolerances shall correspond with <br /> the values listed in ASTM D-2239 , with a standard <br /> dimension ratio (SDR) of 9 . <br /> 4 . Tubing shall be fully labeled with brand name and <br /> manufacturer, NSF seal , size , type of plastic material , and <br /> ASTM designation with which the tubing complies . <br /> 3 . 03 JOINTS <br /> A. Joints for polyethylene tubing shall be of the compression type , <br /> utilizing a totally confined grip seal and coupling nut. Stainless <br /> steel tube stiffener inserts shall also be used for PE tubing <br /> services . <br /> B . Other type joints may be considered for specific installations upon <br /> submission of specifications and approval by IRCDUS . <br /> 3 . 04 INSTALLATION <br /> A. Backfill shall be free of rocks and debris . <br /> B . Bending radius shall be large enough so that tubing is not crimped <br /> or damaged and so that the flow of water is not restricted . <br /> Manufacturer' s minimum radius recommendations are to be <br /> utilized during installation of PE tubing . <br /> 3 - 1 <br />