In the municipal sewer industry, a range of innovative inflow and infiltration detection and prevention technologies are being introduced to enhance system resilience and efficiency. These solutions include chemical grouts for sealing infiltration sources, encapsulation systems for manhole joints and mechanical internal chimney seals that prevent manhole inflow. Additionally, advanced inspection systems are being employed to identify structural conditions and potential cross-bore risks in lateral and mainline pipes. Elastomeric linings and smoke fluid systems are also part of this toolkit, providing flexible barriers against water infiltration and helping locate faults in collection systems. Technologies like those below collectively address the critical challenge of maintaining the integrity of sewer systems.

Avanti International AV-100
AV-100 chemical grout from Avanti International is used to rehabilitate storm and sanitary sewer systems by eliminating infiltration in manholes, mainlines, joints, laterals and lateral connections, and before or after various forms of CIPP lining. It is injected after lining seals in the annular space between host pipe and liner, and lateral reinstatement, which are the primary sources of infiltration. It is an ultralow viscosity, chemically reactive gel with a similar viscosity to water. It can permeate anywhere water can travel and has adjustable cure times from seconds to hours, creating an effective, long-lasting water barrier while providing soil stabilization. 800-877-2570; www.avantigrout.com

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CCI Piping Systems WrapidSeal Manhole Encapsulation System
The WrapidSeal Manhole Encapsulation System from CCI Piping Systems consists of an engineered primer and a wrap-around, heat-shrinkable sleeve designed to seal joints and prevent groundwater from entering a collections system. This material has a high-shrink membrane (70% stretch and 40% recovery) designed to shrink around any manhole profile. In addition, the high-tensile strength accommodates structural movement, while the tough backing resists soil stress and provides suitable abrasion resistance. It can be used for new construction or for the rehabilitation of existing manholes to control infiltration through joints and prevent deterioration, thus eliminating costly maintenance repairs and the added expense of treating groundwater. 800-867-2772; www.wrapidseal.com

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Cretex Specialty Products Internal Chimney Seal
Cretex Specialty Products Internal Chimney Seals are mechanical, so there is no need to worry about surface adhesion or stopping active leaks prior to installation. The seals eliminate and prevent manhole chimney inflow. During wet weather, clear water enters the manhole through deteriorated and broken chimney joints, which may burden the collections system. The chimney seal has a 50-year design life and is available in four widths, allowing complete chimney coverage up to 24 vertical inches with a single seal. 800-345-3764; www.cretexseals.com

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CUES LAMP II
The CUES LAMP II (Lateral and Mainline Probe II) can assist in locating buried assets and help prevent potential cross-bore risks. It is an inspection tool for identifying infiltration and inflow, potential cross bores, pipe defects and structural conditions in lateral services and mainlines. When used with the optional Mini Pan & Tilt Cameras, it can inspect lateral services and traverse multiple bends and wyes when deployed with or against the flow. Mainline inspection is accomplished with a pan, tilt and 40-1 zoom camera. It can pull 1,000 feet of video cable, reducing traffic control expenses while increasing production, and launch 150 feet or more into the lateral. The package includes a detachable steering wand, self-leveling camera head, built-in lens wiper, 360-degrees pan and tilt, four banks of LEDs with variable light intensity, and a built in sonde with switchable frequencies. 800-327-7791; www.cuesinc.com

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Envirosight ROVVER X HD 
The ROVVER X HD sewer inspection system from Envirosight helps municipalities target high-priority areas for inspection, empowering wastewater professionals to pinpoint and characterize I&I sources in mainlines and laterals. It is suitable for performing detailed assessments that provide direct insights into areas of concern. With 12 quick-change wheel options, it can inspect lines from 4 to 96 inches in diameter and keep setup time short. Six-wheel drive with proportional steering navigates it past obstacles, and its overlapping wheels climb offsets with ease. Plus, powerful motors and a geared drivetrain maximize travel range. 866-937-1718; www.envirosight.com

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Sauereisen Manhole ChimneySeal No. F-88
Manhole ChimneySeal No. F-88 from Sauereisen is an elastomeric lining composed of fiber-reinforced, asphalt-modified urethane. It is self-priming with water absorption of 0.05%. Applied by gloved hands at 1/8-inch minimum thickness, it provides a flexible barrier or gasket seal for the prevention of water infiltration. It resists the stresses and movement associated with freeze/thaw environments while maintaining ideal elasticity/adhesion over temperature ranges from -30 to 250 degrees F. 412-963-0303; www.sauereisen.com

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Superior Signal Smoke Fluid Systems
Smoke Fluid Systems from Superior Signal are used to find faults and sources of surface water inflow in collections systems. Smoke fluid is both high-quality and economically priced. Blowers are engineered for smoke testing, using a double-insulated heating chamber with stainless steel injector to maximize dry smoke output and produce quality, liquid-based smoke. Blowers can be configured to work with Superior Smoke Candles. 800-945-8378; www.superiorsignal.com