Chimney Seal

Sewer systems are particularly vulnerable through their chimneys.

Sewer systems are particularly vulnerable through their chimneys. A sewer chimney serves as the entry point to the sewer lines below the street. This makes it possible for polluted street runoff to enter the sewer lines if they are not properly sealed. This can lead to water infiltration which is very costly.

This risk is minimized by modern sealants, which prevent polluted runoff by creating a solid seal. This is a vast improvement over mortar based sealants which had a history of breaking down, especially due to corrosive elements in groundwater and earth movement. With a heavy rain sewer chimneys are hit with water that contains all the chemicals, oils, and acids that have been deposited into the ground.

Chimney Seals May Save Millions
The access points, or doors, to the city sewer system are manhole covers. When a manhole cover is sealed correctly, runoff simply washes over it. This sealing is important for two reasons. First, it can prevent damage to the sewer system from chemicals in ground water. Second, it makes the job of sewer treatment plants easier.

While concrete used to be a standard mortar sealant, today’s chimney sealers are made of a much improved urethane sealer. Concrete may be a great short term solution, but is likely to crack over time when exposed to the chemicals in run off. The benefit of urethane is that resists cracking because it is so flexible and it is impervious to the corrosive properties of many chemicals, including acids.
 

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