Septic Products

Tuf-Tite® Riser for 11×11 Distribution Box (Series B1)

The Tuf-Tite® Riser for 11×11 Distribution Box (Series B1) provides an extension solution for the 4-Hole Distribution Box, allowing for proper grade adjustment in septic system installations. Manufactured from durable polypropylene and featuring a reinforced ribbed construction for added rigidity and structural integrity. These stackable risers extend to grade in convenient 6″ increments, creating proper access depth for maintenance and inspections.

Product Details:
  • Designed specifically for use with Tuf-Tite® Series B1 boxes
  • Dimensions: 11″ x 11″ providing 6″ of elevation per riser
  • Stackable design allows vertical extension in 6″ increments up to 3′
  • Manufactured from injection-molded, UV-stabilized, and non-corrosive polypropylene for exceptional strength and lifetime durability in septic environments
  • Compatible with corresponding 11″ x 11″ lids, including both solid lids and drain grates
  • Creates accessible inspection points at appropriate grades
  • Maintains watertight system integrity with proper installation
  • Simple interlocking design ensures secure connection to distribution box
Part Numbers:
  • B1-RIS Riser for Series B1 (11×11) Boxes
    (16 per carton)