riser
a. Pipe to elevate a sprinkler head above the lateral pipe; b. Vertical pipe or structure used as part of a principal or low-flow spillway in a dam or terrace.
Authorization Path: 2.4.5.2.20.15
a. Pipe to elevate a sprinkler head above the lateral pipe; b. Vertical pipe or structure used as part of a principal or low-flow spillway in a dam or terrace.
Authorization Path: 2.4.5.2.20.15