C. 1773
D. 1802
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D. The air admittance valve
A. Boston, 1879
C. New York, 1807
D. Richmond, 1811
A. Ridgid
B. Spartan Tool
D. Picote
Photo Credit: iStock/Thinkstock
A. Air Snake from Milwaukee
B. Air Blaster from Wham-O
C. Bicycle Pump from Schwinn
Photo Credit: ID 118509808 © | Dreamstime.com