The parts list is as follows (SCH 40 except were indicated):

• (1) 36" section of 1.5" PVC (for the barrel)
• (1) 1.5" Coupler (slip)
• (1) 1.5" to 1" Bushing (slips inside the Coupler)
• (2) 1" SCH 80 Nipples (1) Sprinkler Control Valve with manual release (more on this later)
• (2) 90° 1" Elbows (male on one end, female on the other)
• (1) 2" to 1" Bushing (slips inside the Coupler)
• (1) 2" Coupler
• (1) Metal air stem (more on this later)
• (1) 36" section of 2" PVC
• (1) 2" End Cap (slip)

You'll also need Teflon plumbing tape, PVC primer and PVC glue.