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Polylok risers hold their shape, are stackable, screw together, and are water and airtight. Structural ribs inside prevent frost from adhering to the riser in frost prone areas.




Tired of digging to access your system? We've got you looked after!

Have plastic?

  • Plastic Risers
  • Plastic Replacement Lids


Have concrete but want to switch to plastic?

  • Universal adapter plate
  • 20" adapter ring
  • 24" adapter ring


 Adapter ring accepts either 20" or 24" Riser

  • Covers up to 25" square opening

Polylok 20"x 2" high riser

Excluding Sales Tax