![Back Water Valve](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544293-20240906_162413.jpg?v=1731679199)
Back Water Valve
The Mainline Back Water Valve (BWV) is installed and floor is restored with fresh concrete.
![Floor is opened up](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544294-20240905_133335.jpg?v=1731679199)
Floor is opened up
THe floor is opened up and the sewer main is exposed. The location of of this pipe is confirmed by a CCTV company.
![MAiline BWV is installd](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544295-20240906_113336.jpg?v=1731679199)
MAiline BWV is installd
The pipe is cut and a BWV is inserted. One feature of the Mainline is that it is clear so it can be easily inspected.
![Triplesafe installed](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544296-20240905_133353.jpg?v=1731679199)
Triplesafe installed
The Triplesafe sump pump system is installed to disconnect the weepers from the floor drain. There is a feedline from the BWV to the Triplesafe.
![Mainline BWV close-up](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544297-20240906_113356.jpg?v=1731679199)
Mainline BWV close-up
Here you can see the valve used to stop any back water from coming back to the home.
![Feedline from BWV](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544298-20240906_124425.jpg?v=1731679733)
Feedline from BWV
THe feedline insures that any water under the floor and entering the BWV box will be drained to the sump. This is a very common thing.
![Feedline in Sump](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544299-20240906_124442.jpg?v=1731679733)
Feedline in Sump
Here you can see the feedline entering the sump and the 3 pumps in the Triplesafe.
![Dual discharge](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544300-20240906_160532.jpg?v=1731679733)
Dual discharge
For redundancy, the Triplesafe features two discharge lines.
![Floor restored](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/544301-20240906_162424.jpg?v=1731679733)
Floor restored
after the sump and the BWV is installed and the Halton region has inspected and signed off, the floor can be restored back to original height.