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## How many inches of rain does it take to fill a rain barrel?

A general rule of thumb to utilize in the sizing of rain barrels is that **1 inch of rainfall on a 1000 square foot roof will yield approximately 600 gallons**. Example: one 60-gallon barrel would provide runoff storage from a rooftop area of approximately 215 square feet for a 0.5 inch (0.042 ft.) of rainfall.

## How much rain does it take to fill a 55 gallon rain barrel?

This means that **0.3 inches of rainfall** will fill a 55-gallon rain barrel placed under each downspout. Locate rain barrels under downspouts where rainwater can be easily collected for garden or lawn.

## How much rain does it take to fill a rainwater tank?

An average 4 bedroom house has a roof surface area of approx. 200 square metres. So, if you have an average 3 bedroom house and a 3000L tank, it would take **20mm of rain** to fill your tank. On average each of us uses 147 litres of water per day.

## How often should you empty a rain barrel?

Empty the rain barrel **between storm events**. If more than one barrel is needed for your roof area, install additional barrels in series. Cracks or damage The rain barrel contained water and temperatures dropped below freezing. Make sure you empty your rain barrel prior to winter.

## Can kids play with rain barrel water?

During the spring and summer months routinely inspect your rain barrel. Remove any debris that has accumulated on the lid that might block the screen mesh. … The water collected in **rain barrels is not suitable for human consumption**. Please make sure that children and pets do not drink water collected in a rain barrel.

## How much rain will fall on my roof calculator?

**To calculate the runoff from any given rainfall:**

- Take the dimensions of the footprint of your roof and convert them to inches. (So, a 50′ x 20′ roof is 600″ x 240″.)
- Multiply the roof dimensions by the number of inches of rainfall. (In this example, 600″ x 240″ x 1″ = 144,000 cubic inches of water.)

## How do I calculate how much rain water I will collect?

Simple Rainwater Harvesting Formula – For every 1” of rain and 1,000 square feet of impermeable surface (roof, driveway, etc), about 620 gallons are generated. Meaning, you can capture about **.** **62 gallons per sq ft.** To figure out the square footage of a surface, multiply the width x length.

## How large should my rainwater tank be?

In general we recommend that water storage tanks should be **sized large enough to meet local fire code requirements plus an additional 2 days of water supply for your irrigation and household needs**. The average American household with water efficient appliances uses, on average 70 gallons per person per day.

## How long does it take to fill water tank?

The time it takes for your electric water heater to fill depends on the size of the tank. A 40-gallon tank may take between 30 to 40 minutes to fill up whereas an **80-gallon take may take between 60 to 70 minutes**.

## How long should a tank of water last?

There are several factors, therefore, that can affect how long a water tank will last. A good rule of thumb is to consider **10 years the minimum lifespan**.