I Have These Leak Detectors Everywhere in My House, and They're 75% Off During the Last Few Hours of Prime Day

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Prime Day 2025 ends tonight, and Lifehacker is sharing the best sales based on product reviews, comparisons, and price-tracking tools before it's over. 

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If you own a home, you’ve probably learned to fear water—I sure have. Not only has my house flooded a few times due to natural disasters, I’ve also had to deal with sneaky leaks from old plumbing. And those sneaky leaks can do a lot of damage if you don’t notice them right away, rotting your home’s structure and encouraging mold and insects.

That’s why I learned a long time ago that placing leak detectors (aka water alarms) all over the house is a necessary step if I want to sleep at night. If you haven’t taken that step, now’s the time, because this three-pack of excellent water leak detectors from Treatlife is a whopping 75% off for Prime Day. That means you can buy twelve detectors for the price of three and protect your whole house from water leaks—from toilets, dishwashers, water heaters, kitchen appliances, pipes in the crawlspace, walls, or basement, washing machines, and under sinks. And these detectors can also warn you of roof leaks before they become noticeable, which can spare you from serious damage.

The alarms connect to your wifi network and can be accessed from an app on your phone (they’re also compatible with voice assistants like Alexa and Google Home). You simply pop in batteries and place them inconspicuously around potential leaks. If they come into contact with water, they’ll emit a loud—and I can tell you these detectors are LOUD—alarm and simultaneously send an alert to your phone. That’s crucial, because it means you can be away from the house and still be able to react in time if a leak springs up in the house. The app will also warn you when the batteries need replacing, so you won’t forget.

At 75% off, these Treatlife wifi water leak detectors are an incredible investment in the safety and preservation of your property. I have them everywhere, and at this price, it’s the ideal opportunity to blanket your house in water leak protection.

Looking for something else? Retailers like Walmart, Best Buy, and Home Depot have Prime Day competition sales that are especially useful if you don’t have Amazon Prime.

• Walmart’s Prime Day competition sale begins at midnight on July 8 and will include deals up to 50% off. It’s an especially good option if you have Walmart+. 

• Best Buy’s Prime Day competition sale, “Black Friday in July,” runs through Sunday, July 13 and has some of the best tech sales online. It’s an especially good option if you’re a My Best Buy “Plus” or “Total” member.