20" X 6" POLYLOK Riser

We have combined all the best features of concrete and plastic risers to create our patented riser system. Our risers hold their shape, are stackable, screw together, and are water- and airtight. Internal structural ribs prevent frost from adhering to the riser in frost-prone areas.

U.S. Patent No# 6,655,093; 6,688,072; 6,484,451; 6,877,28

DETAILS

• Watertight and airtight
• Allows the septic tank to be easily vacuumed or water tested
• Highest UV-Ray Protection on the market today
• Easy to bring septic access to grade
• Made of high-density polyethylene, which won't shatter like some Polypropylene risers
• Tear off the riser ring to eliminate frost problems
• Structural ribs inside prevent frost from adhering to the riser in frost-prone areas