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In built-in lawn sprinkling systems, there is a device called an anti-siphon valve. What is it for and how does it work?

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In built-in lawn sprinkling systems, there is a device called an anti-siphon valve. What is it for and how does it work?

What are carbide tips?

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A lot of tools (like saw blades and drill bits) come with "carbide tips." What is carbide? What are carbide tips? How do you sharpen them?

What causes the loud banging noise in my home's pipes?

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What causes the loud banging noise in my home's pipes? For example, when I turn off the faucet I hear it. Is there a way to prevent it?

What does "Case Hardened" mean when it's stamped on a piece of metal?

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I have a lock that has the words "Case Hardened" stamped on it. I have seen this on lots of things made of metal. What does "Case Hardened" mean?

What is fertilizer and why do plants need it?

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What is fertilizer and why do plants need it? What do the three numbers on most bags of fertilizer mean?

What is in moth balls? Is it harmful to people?

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Moth balls use fumes to kill moths and moth larvae. Learn more about moth balls and find out what the main active ingredient is in moth balls.

What is plywood? Why do people use it so much? What about oriented strand board (OSB)?

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What is plywood? Why do people use it so much? What about oriented strand board (OSB)?

What is the crystalline substance found in disposable diapers?

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When we change our baby's diaper, he often has what we politely refer to as "crystal butt." There are little clear crystals on his bottom. It seems like they come from his diaper. Do you know what these crystals are?

What is the difference between a fluorescent light and a neon light?

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Have you ever wondered what the difference is between a fluorescent light and a neon light? We'll explain both technologies in this article.

What is the function of the fan in a refrigerator?

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You refrigerator is already cold, right? So then, why does it need a fan? Find out in this article.