text: An aerator mixes air into a stream of water in order to smooth the flow of water and to reduce splashing
  Unobstructed vertical distance between the faucet spout end (aerator) and the flood rim of the sink or lavatory. Some plumbing codes require a minimum distance of e.g. 1 inch
  Pressure compensating flow regulators maintain a near-constant flow rate by compensating for variations in line pressure. Controlling the flow rate improves system performance and in the case of plumbing systems provides comfort of use at low pressure as well as water and energy savings at high pressure
  When actuated mechanical or electronic metering faucets dispense water for a pre-determined period of time. Combined with a PCA® aerator, metering faucets deliver a pre-defined volume of water to meet code requirements (0.25 gpc)
  Refers to a fixed orifice. A restrictor produces higher flow at higher pressure (excess flow) and lower flow at lower pressure (insufficient flow)
  Factors to consider when comparing stream quality include effective aeration, stream straightness, stream diameter, side splash and of course actual flow performance (flow rate across the pressure range)