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
expose main trunk
The floor is opened and the main trunk coming into the house is identified and cut ready for the backwater valve
Mainline backwater valve
a backwater valve is installed into the main trunk coming into the house. Gravel is added before the new concrete.
backwater valve concreted
Once the valve is in place, the floor can be refinished with concrete
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.
New Sump liner
THe original sump liner is removed completely and a new sump liner is installed level with the floor.
Sealed lid
Once the new sump is installed the sealed lid is secured and a new discharge line is completed replacing the original