Schedule 80 PVC threaded nipples, or risers, as some people call them. 

Commonly used to connect sprinklers to pipe fittings or raise sprinklers from their pipe fitting.

• Sizes = 1/2", 3/4" and 1"
• Lengths = Close(1"), 2", 3", 4", 6"
• Other sizes are available on special order. Contact us for these products.