Imagine you’re standing on your roof in the middle of a hot afternoon. If you’re wearing a black t-shirt, you’re going to feel like you're roasting. That is exactly what happens to your water tank.

Here is the simple truth about why your tank needs a "jacket":

• It’s basically a water heater: A black plastic tank absorbs sunlight all day. By the time you want to take a shower or wash your face, the water is so hot it can actually sting your skin. A reflective cover acts like a giant umbrella, keeping that water at a normal, usable temperature.

• Sunlight ruins plastic: You know how plastic toys left outside get brittle and eventually crack? The same thing happens to your expensive water tank. The sun slowly "cooks" the plastic until it leaks. A cover saves you from having to buy a new tank every few years.

• Gross stuff loves heat: Warm water and sunlight are the perfect ingredients for green algae and bacteria to grow inside your tank. If you keep the water dark and cool, the water stays much cleaner for your family.

• It’s a one-time fix: You put the cover on once, and it works 24/7. No electricity, no maintenance—just cool water whenever you turn on the tap.

Basically, a good cover is like moving your water tank into the shade, even when there isn't any.

Does your tank sit in full sun all day, or do you have some shade on your roof?