![Large bench footing](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/510828-20240408_095602.jpg?v=1713383180)
Large bench footing
This area become a challenge for waterproofing
![Delta membrane](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/510829-20240412_145516.jpg?v=1713383180)
Delta membrane
The Delta membrane is used for drainage. It goes over the bench footing and down tot he drainage system.
![trench in front](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/510830-20240415_120842.jpg?v=1713383180)
trench in front
The drainage trench is cut in front of the bench footing
![Sump pump added](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/510831-20240415_163044.jpg?v=1713383180)
Sump pump added
a triplesafe sump system is added to the waterproofing system.
![Three pumps](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/510832-20240410_100014.jpg?v=1713383180)
Three pumps
The triplesafe eatures 3 pumps in one liner. @ pumps are AC powered, cast-iron Zoeller pumps The third is a DC powered batter back-up pump.
![Discharge pipes.](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/510837-20240410_093118.jpg?v=1713383764)
Discharge pipes.
THe Triplesafe features two discharge pipes incase one pipe gets blocked.