Internal Chimney Seal stops inflow between the manhole frame and cone.
The Classic Internal Chimney Seal is available in standard 8-3/8″, wide 10″, and extra-wide 13″. The sleeves are made of rubber that conforms to the physical requirements of ASTM C-923, as modified, with a minimum of 3/16′ thickness for durability and resistance to puncturing or tearing. The pleated configuration provides for a minimum 2″ vertical or 1/2″ horizontal movement before stretching the material. Flexibility of the material allows one size to fit a frame or chimney diameter differential up to 20%.
•Provides watertightness with the flexibility to allow the manhole frame to move with the surrounding pavement as it reacts to frost heave, thermal expansion/contraction and traffic loadings.
•Reduces excess clearwater in sanitary sewer system by stopping manhole frame/chimney inflow, thereby providing more system capacity, and reducing treatment and pumping costs.
•Installed inside existing manholes, no expensive and time-consuming excavating and pavement replacement needed.
•Installed in new manholes after paving is complete without interfering with or delaying paving operations.
•Reusable – can be moved or removed and reused elsewhere if needed.
•Constructed of high-quality, long-lasting materials.
Internal rubber sleeve developed to stop inflow under the manhole frame.
Available in four widths with unexpanded vertical heights of 8″ (LSS 0-6), 10″ (LSS 6-12), 14″ (LSS 12-18), and 18″ (LSS 18-24). The flexible rubber sleeves are extruded or molded from a high-grade rubber which conforms to the applicable material requirements of ASTM C-923. The seals have a minimum thickness of 0.130″ for durability and resistance to tearing and puncturing, and a range of coverage which allows a span of up to 24 vertical inches without the use of an extension. The flexibility of this material allows one size to fit a frame/chimney diameter range of up to 20%.
• Lower cost
• Easier installation
• More range of coverage
• Eliminate the need for extensions
• Provides flexible, water tight seal
• Mechanical seal, does not rely on chemical bond