At Culligan of Northern Nevada & Eastern Sierras we go to great lengths to test your water, inspect your plumbing, and ask questions about your family's water needs to make sure you're happy with your Culligan water from day one. However, if we ever make a mistake, let us know within 30 days and we'll be glad to correct it or refund your money. You have my personal promise. If there's ever an issue, don't hesitate to call me.