Install aerators on kitchen sinks (except fill sinks) that do not exceed flow rates of 1.5 gpm.
Green Business Program staff can help measure the flow rate of unstamped faucet aerators.
• SF Public Utilities Commission (SFPUC) provides free faucet aerators to commercial customers.
• Standard aerators are devices that are designed to reduce the flow of the water coming out of the faucet while introducing air into the water flow. That is why they are called "aerators". Aerators will usually have a rated flow (in gallons per minute or gpm) imprinted on the side. If there appears to be an aerator installed, but there is no flow rate stamped on the side, the aerator may not be a low flow type and should be replaced with a new one.
• Some designer faucets have an internal built in "laminar" restrictor. Laminar restrictors work differently than standard faucet aerators by producing dozens of parallel streams of water. A business can ask the manufacturer for the flow rate of these faucets. (insert image here)
• If aerators keep suddenly disappearing, tamper proof aerators are a great alternative. They are inexpensive and simple to install.
• A “fill sink” is a sink typically used in commercial kitchens for quickly filling large containers with water. For fill sinks only, Green Businesses may be allowed to use aerators with flow rates of 2.5 gpm, when approved by Green Business staff.
Contact SF Public Utilities Commission for a Water-Wise Evaluation at 415-551-4730 to set up an appointment and mention the Green Business Program. The Water-Wise Evaluation is a free assessment of a company’s water use, fixtures, and opportunities for improving water efficiency. SFPUC can provide free faucet aerators, showerheads, and incentives for upgrading toilets and urinals.
Above and Beyond
Pre-Rinse Spray Valves: Foodservice operators may want to use a low-flow pre-rinse spray valve, one of the easiest and most cost effective water and energy saving devices available. In addition to minimizing water consumption, water heating energy and sewer charges are also reduced. Pre-rinse spray valves can use as little as .65 gallons per minute compared with older models that use 3 or more gallons per minute.
• In order to qualify for Green Business program recognition, applicants must use 1.6 gpm spray valves or less. For more information about pre-rinse spray valves, go to http://www.fishnick.com/equipment/sprayvalves/.