Major Walter C. Wingfield invented tennis in Great Britain on this day in 1873. Today it’s a very popular game worldwide. We have long have pondered what to do with tennis balls once they’ve lost their usefulness on the courts. Here’s yet another of our many uses. This one keeps crawling insects from entering your home through drains set in concrete basement floors. Remove the cover and drop an old tennis ball in the neck flange. Replace the cover and it’ll block the drain pipe until water enters. Then the ball will float, allowing the water to drain. It will re-settle into position over the pipe once it’s gone. In tennis “love” means zero, which is exactly how many crawling basement insects you will have if you take our loving advice. And that's the On The House tip for today.