20"x 2" risers are a great solution for systems needing only a few inches to come to grade.

• Allows tank, riser, and tank lid to be poured together
• Accepts additional 20” Risers to bring to grade for servicing
• Patented ring to guarantee watertight and airtight seal between concrete tank and riser
• Fits anywhere in the Riser stack
• Can be used as a 2″ Riser

20" x 12" Riser. For use with 20" Round Distribution Box. DISTRIBUTION BOX NOT INCLUDED.