APCO is a leading producer of the most complete line of air valves in the world. APCO air valves are used on pumps and pipelines in power plants, utilities, municipalities and industrial plants of all types. APCO has furnished air valves to the Army, Navy, Air Force, Coast Guard and on many critical installations, including missile sites and nuclear submarines.

APCO Willamette manufactures:

• Ball Cone valves for water & sewer
• Double door check valves wafer/lug bodies
• Wafer & globe style silent check valves
• Rubber flapper swing check valves for sewage, water & slurries
• Slanting disc check valves for water
• Convertable swing check valves
• Air release, air vacuum & combination air & vacuum valves for water & sewage
• Full flow foot valves for water & sewage
• Surge relief valves for water & sewage