Let it rain! We can't believe it! Not a drop of water with all the rain we got this spring. The system worked like you told us it would. The battery back-up lets us rest assured we won't flood! The installation was started the day promised and done professionally. When you see a sign in the yard saying "Another dry basement by Waterproofing Specialties" you can believe it. Thank you so much! And I almost forgot......The house smells like a house again not a damp, stinky, moldy basement.