How many gallons will a can of 5 gallon AFFF make?

How many gallons will a can of 5 gallon AFFF make?

• A. 60 gallons
• B. 660 gallons
• C. 120 gallons
• D. 5 gallons

Answer: (B)

Foam concentrate is diluted with water to create the finished foam solution. The amount of finished foam you get from a given can depends on the mix ratio, i.e., what percentage of the final solution is concentrate. In this case, the mix is 0.75% concentrate. That means for every 100 gallons of finished foam, 0.75 gallons come from concentrate and 99.25 gallons come from water. So, one gallon of concentrate yields about 100 / 0.75 ≈ 133.3 gallons of finished foam. With a 5-gallon can, multiply: 5 × 133.3 ≈ 666.7 gallons. Tests often round to the nearest tens, giving about 660 gallons. The other options would require different mixing ratios (e.g., far more concentrate per volume of finished foam), which aren’t the standard for this scenario.

Foam concentrate is diluted with water to create the finished foam solution. The amount of finished foam you get from a given can depends on the mix ratio, i.e., what percentage of the final solution is concentrate.

In this case, the mix is 0.75% concentrate. That means for every 100 gallons of finished foam, 0.75 gallons come from concentrate and 99.25 gallons come from water. So, one gallon of concentrate yields about 100 / 0.75 ≈ 133.3 gallons of finished foam.

With a 5-gallon can, multiply: 5 × 133.3 ≈ 666.7 gallons. Tests often round to the nearest tens, giving about 660 gallons.

The other options would require different mixing ratios (e.g., far more concentrate per volume of finished foam), which aren’t the standard for this scenario.