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After CCTV
after the CCTV of the main trunk is done, a tape is put on the floor so the installer knows where to put the Backwater valve
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expose main trunk
The floor is opened and the main trunk coming into the house is identified and cut ready for the backwater valve
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Mainline backwater valve
a backwater valve is installed into the main trunk coming into the house. Gravel is added before the new concrete.
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backwater valve concreted
Once the valve is in place, the floor can be refinished with concrete
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Old Sump System
This is probably a builder sump. the pit is open with no sealed lid. the pump is a pedestal style which tend to not last long. This entire pit and pumps are to be replaced.
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New Sump liner
THe original sump liner is removed completely and a new sump liner is installed level with the floor.
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Sealed lid
Once the new sump is installed the sealed lid is secured and a new discharge line is completed replacing the original