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Solvent weld joints
Pressure pipe and fittings are for use in the distribution of pressurized fluids only, which are chemically compatible with the piping materials
Pipe produced to a standard dimensional ratio (SDR) has a wall thickness that is proportional to its diameter and all sizes have the same pressure rating, the pressure rating for schedule pipe decreases as the diameter increases
PTFE thread tape is recommended for threaded joints
Also may be used to prevent damage to the sprinkler head
Gray fittings used for sprinkler systems where an extension is needed for the sprinkler head to be above ground level. Also may be used to prevent damage to the sprinkler head. Teflon thread tape is recommended for threaded joints.