Performance Requirements for Reverse Osmosis Water Efficiency – Drinking Water
|Publication Date:||1 April 2020|
This standard covers water efficiency, automatic shut-off valves, and flow restrictor requirements for Residential RO systems and performance testing to address the membrane life concerns of high efficiency RO membranes. This standard includes test requirements for complete systems or components (RO membrane, automatic shut off valve, flow restrictor). RO systems typically consist of the following components:
• System manifold
• RO membrane
• Pre- and post-filtration assemblies
• Supply connection
• Drain connection
• Storage tank (e.g. atmospheric tank, captive air tank)
• Faucet or dispensing valve
• Check valves
• Push fit fittings
• Tank backpressure reduction mechanism (e.g. permeate pump) (optional)
• Booster pump (optional)
A shut-off device is a required component for system compliance to this standard. Systems that incorporate a flushing mechanism are acceptable. The volume of water used for flushing during normal operation is a part of reject water. This does not include water used for pre-conditioning during system startup.
Residential RO systems use a variety of membrane sizes based on the design of the system. There is no limitation on flow rate for the system.
Note: Refer to ASSE 1087 for requirements for commercial systems.
Systems and components shall be able to operate under static pressures of 20 - 125 psi (138 - 861 kPa).
Systems and components shall be able to operate with water temperatures of 39 - 100 °F (3.9 - 37.8 °C).