1.1 ,This practice describes general procedures for making joints with polyolefin pipe and fittings by means of electrofusion joining techniques. This practice is applicable to electrofusion fittings that utilize resistance wire as the heating element. These should be regarded as general procedures and not as a substitute for the installation procedures specified by the manufacturers. Manufacturers should be requested to supply specific recommendations for joining their products. This practice does not purport to address all possible electrofusion joining procedures, or to preclude the use of qualified procedures developed by other parties that have been proven to produce reliable electrofusion joints.