In finance, the expiration date of an option contract is the last date on which the holder of the option may exercise it according to its terms.
ALV: Amicale LaÃ¯que de Voiron (French sports organization; Voiron, France) ALV: Asta La Vista: ALV: Application List Viewer: ALV: Automatic Licence Verification (UK) ALV: Air Launched Vehicle: ALV: Advanced Launch Vehicle: ALV: Area of Landscape Value: ALV: Available Lysine Value: ALV: Algemene Leden Vergadering (Dutch: General Membership Meeting)
Studor Air Admittance Valves (AAVs) are negative pressure-activated, one-way vents, used in a drainage system to eliminate the need for passive pipe venting and unsightly, costly roof penetrations.sing AAVs significantly reduces the amount of materials needed in a plumbing system, increasing plumbing labour efficiency, allowing greater flexibility in the layout of plumbing architecture, and reducing long-term roof maintenance problems associated with conventional vent stack roofing penetrations.