1. Unhook chain at the flapper end: 2. Adjust the flapper chain according to the length of your old flapper chain: Please click here for detailed instructions on how to adjust the flapper chain. 3. Adjust float to the location it was on the previous flapper by removing the black disks: 4. Adjust float higher on the chain:
Variable air volume. Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system. Unlike constant air volume (CAV) systems, which supply a constant airflow at a variable temperature, VAV systems vary the airflow at a constant temperature.
From Wikipedia, the free encyclopedia. A value-added service (VAS) is a popular telecommunications industry term for non-core services, or in short, all services beyond standard voice calls and fax transmissions. However, it can be used in any service industry, for services available at little or no cost, to promote their primary business.