Extinguishing Agent

Extinguisher type and size

Old Classification

Approximate Present -- Classification

(a)

Chemical solution

(1)

1 ¼, 1 ½ gallon

A-2

1-A

(soda-acid)

(2)

2 ½ gallon

A-1

2-A

(3)

17 gallon

A

10-A

(4)

33 gallon

A

20-A

(b)

Water

(1)

1 ½, 1 ¾ gallon (pump or pressure)

A-2

1-A

(2)

2 ½ gallon (pump or pressure)

A-1

2-A

(3)

4 gallon (pump or pressure)

A-1

4-A

(4)

5 gallon (pump or pressure)

A-1

4-A

(5)

17 gallon (pressure)

A

10-A

(6)

33 gallon (pressure)

A

20-A

(7)

5 12-qt. or 6 10-qt. water filled pails

A-1

2-A

(8)

55 gallon water filled pails

A-1

2-A

(9)

25 55-gallon water filled tank with above 5 or 6 fire pails

A-1

2-A

(c)

Loaded stream

(1)

gallon

A-2, B-4

1-A

(2)

1 ¾ and 2 ½ gallon

A-1, B-2

2-A, ½ -B

(3)

33 gallon

A

20-A

(d)

Foam

(1)

1 ¼ and 1 ½ gallon

A-2, B-2

1-A, 2-B

(2)

2 ½ gallon

A-1, B-1

2-A, 4-B

(3)

5 gallon

A-1, B-1

4-A, 6-B

(4)

10 gallon

A, B

6-A, 8-B

(5)

17 gallon

A, B

10-A, 10-B

(6)

33 gallon

A, B

20-A, 20-B

(e)

Vaporizing Liquid

(1)

1, 1 ¼, 1 ½ -qt. (pump)

B-2, C-2

½ -B, C

(carbon tetrachloride base)

(2)

1, 1 ½, 2, 2 ½ -qt. (pressure)

B-2, C-2

½ -B, C

(3)

1, 3 ½ -gallon (pressure)

B-2, C-1

1-B, C

(f)

Vaporizing Liquid

(1)

1 and 1 ½ -qt. (pressure)

B-2, C-1

1-B, C

(chlorobromo methane)

(2)

1 gallon (pressure)

B-2, C-1

2-B, C

(g)

Carbon dioxide

(1)

6 or less pounds of carbon dioxide

B-2, C-2

1-B, C

(2)

7 ½ pounds of carbon dioxide

B-2, C-1

2-B, C

(3)

10 to 12 pounds of carbon dioxide

B-2, C-1

4-B, C

(4)

15 to 20 pounds of carbon dioxide

B-1, C-1

4-B, C

(5)

25 to 26 pounds of carbon dioxide

B-1, C-1

6-B, C

(6)

30 pounds of carbon dioxide

B-1, C-1

10-B. C

(7)

75 pounds of carbon dioxide

B-1, C-1

12-B, C

(8)

100 pounds of carbon dioxide

B, C

12-B, C

(h)

Dry chemical

(1)

4 to 6 ¼ pounds of dry chemical

B-2, C-2

4-B, C

(2)

7 ½ pounds of dry chemical

B-2, C-1

6-B, C

(3)

10 to 15 pounds of dry chemical

B-1, C-1

8-B, C

(4)

20 pounds of dry chemical

B-1, C-1

16-B, C

(5)

30 pounds of dry chemical

B-1, C-1

20-B, C

(6)

75 to 350 pounds of dry chemical

B, C

40-B, C

(i)

Wetting agent

(1)

10 gallons

A, B

6-A

(2)

20 gallons

A, B

12-A

(3)

50 gallons

A, B

30-A

Note: Carbon dioxide extinguishers with metallic horns will not carry any C classification.