20" Riser Pan
Provides a secondary concrete plug for additional safety. Accepts additional 20'' Risers to bring to grade.
- Allows tank, riser, and tank lid to be poured together
- Accepts additional 20'' Risers to bring to grade for servicing
- Pan has key-way for positive concrete lid positioning
- Pan is held in perfect alignment on the inner core of mold with four mold fastening nails for fast installation
- Patented ring to guarantee watertight and airtight seal between concrete tank and riser