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Frequently Asked Questions - Collection Systems
  • We have a manhole rehabilitation project planned and need to redirect or isolate the flow of the effluent. What do you suggest?
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    • Flow-through sewer plugs are the answer. Simply insert an inflatable wide-mouth plug into each opening in the manhole and connect the openings in the center of the plugs with hose. These plugs are suitable for gravity by-pass or by-pass pumping. Sizes are available for sewer lines 8" through 15".
  • I’m considering purchasing a sewer camera. Which is better, black & white or color?
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    • This depends on what you are using the camera to find. If looking for a hairline crack in clay tile, then color would be the best choice. But if you are checking to see why a line is blocked, then black & white would be able to do the job. Black & white provides a crisper picture and lower lux (the amount of light required to obtain a picture) rating. However, color is best used for details, and identification when you need to know what exactly is in the pipe. For example, is the blockage grease, mud, or something else? Since technology has improved over the last couple of years, the price of color models has decreased dramatically. With color being more competitively priced, the majority of cameras now sold are color.
  • Should we purchase a lateral or mainline camera system?
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    • Lateral cameras are for pipe sizes 2-1/2" through 12". These cameras are small enough to negotiate the 90° bends. This camera is limited to 12" pipe because of the amount of light the unit provides. These camera systems use fiberglass push cable or rods. Most systems allow up to 300’ of cable. This cable is pushed through the pipe manually and is very difficult to push over 300’.
      Mainline cameras are used in lines 6" or larger. These camera systems are much larger than the lateral cameras. The light source(s) are much brighter, allowing the camera to view the larger diameter pipes. These cameras are skid or tractor styles. Skid cameras usually include 500’ to 1000’ of coaxial cable. The camera is usually propelled through the pipe with the use of a sewer jetter. Alternatively, the camera can be pulled using a winch and cable. Tractor cameras are remote-controlled, motorized units. These cameras are much more expensive but require little physical effort to operate.
  • I have an I/I (Inflow/Infiltration) problem with several manholes in our stormwater system. What do you recommend as a possible solution?
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    • Depending on the source of the infiltration, there are several possible solutions. Is the lid the source of the infiltration? If so, then you may want to use an inflow protector. Not only will they slow or stop water, but they‘ll also offer excellent resistance to oils, fuels and other contaminants. If the source of your infiltration is in the frame, then you may want to apply a mastic packing under the frame and re-set it or apply the mastic to the lip of the frame where the manhole lid seats. Additionally, you can seal the frame with a Cretex® inner manhole chimney seal. For I/I problems occurring within the barrel sections, bench or the cone, we would recommend the use of a hydraulic cement or grout. If your manhole is in very poor shape, then the only viable solution may be to hire a contractor to come out and apply a cured in place (C.I.P.) spraywall application to the entire manhole which will completely seal and rehabilitate the manhole.
  • I have a drain line from a restaurant that keeps getting plugged with grease. What can I use to alleviate this problem?
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    • There are several means of restoring the full hydraulic capacity of the drain pipe(s) where grease is concerned. I suggest using either a sewer Jetter or a Rodder/Cable machine to initially clean out the drain. This will effectively remove the grease build up. After that step, you can apply a product such as EHC-33 which will help to proactively metabolize grease and prevent it from building up on the pipe wall as part of an ongoing preventative solution.
  • We have a lift station that is in close proximity to some homes in our town. Some of the residents are complaining that the odor emitted from this lift station is unbearable. What can I do to either mask or eliminate the odor?
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    • In most cases, the most cost effective and easiest solution would be to purchase one of our “Big Blue” bio blocks. It’s a solid, bacteria-laden block that degrades organic waste. The block gradually dissolves over 30-90 days, adding bacteria continuously as the level of the effluent rises and touches the block. Just hang it at or just below the floats.