The PVC pressure pipe fittings from Lowes from Genova and NSF for lawn and garden are available in two sizes and designs. For irrigation and residential sprinkler systems the pvc pressure pipes and all plumbing and plumbing supplies are found at Lowes.
NSF 3/4" x 10' 200PSI PVC Pressure
Use for pressure applications mainly irrigation
ASTM-D-2241, SDR-21, SDR26 
Genova
1/2" x 10' PVC Pressure Pipe
PVC SDR 13.5 pressure pipe
Used in cold water pressure applicaions only such as irrigations and underground residential sprinkler systems
Pipe and fittings are the same as iron pipes sizes
Use with PVC SCH 40 pipe or foam core pipe
140° maximum working temperature 
the pvc pressure pipe fitting is found at lowes.com
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