The installation manual is written as a basic guide for Underground Installation of Glass Reinforced Plastic (GRP) pipes of FARATEC N.P. (Composite Technology Center). This manual provides guidelines and requirements for successful buried installation of GRP pipes for users, design engineers, field engineers, and supervisors. The procedures of this manual mainly describe the common conditions that may be met in the field. Special circumstances which may be encountered in the field can be resolved by consulting FARATEC.