Install sump pump, Sump Basin, Core foundation wall for discharge. Tips and How To for Homeowners. Zoeller M53 Sump P{ump is being installed in a tight crawl space. Diiging out the sump pit takes about 2 housrsll basoin, and pump. Next drill (core) the foundation wall to plumb 1 1/2 inch PVC with Check Valve from the pump to ouside. Apple Drains Drainage Contractors www.AppleDrains.com We'll Make It Right The First Time. www.appledrains.com/drain See Average Costs of All Installs Trusted and Recommended by Your Neighbors Since 1997 Apple Drains