neoperl - flow, stop and go


An aerator mixes air into a stream of water in order to smooth the flow of water and to reduce splashing

Aerator marking

Spout-end devices must bear a permanent legible marking «A112.18.1M» and the flow rate in gpm or gpc or in liters per minute (FTC rule 305.11)

Air gap

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


American National Standard Institute


American Society of Mechanical Engineers


Canadian Standard Association International

Flow regulator

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


International Association of Plumbing and Mechanical Officials


Leadership in Energy and Environmental Design

Metering faucet

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)


National Sanitation Foundation


Aerator with pressure compensating technology


pounds per square inch
1 psi = 0.06895 bar

Public lavatory faucet

Faucet installed in non-residential bathrooms exposed to walk-in traffic


Refers to a fixed orifice. A restrictor produces higher flow at higher pressure (excess flow) and lower flow at lower pressure (insufficient flow)

Stream quality

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)


Colour-coding system for NEOPERL® aerators: easily identify the respective model


gallons per minute
1 gallon = 3.785 liters


Australian Water Efficiency Labelling and Standards Scheme