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Obtaining visual submeter reads on property is time consuming, exposes meter readers to safety concerns and often requires businesses to provide escorts. Using ERT technology allows SPU to obtain submeter reads from the city right of way. SPU will still require periodic access to each submeter to obtain a visual verification read.
Your individual compliance plan provided by SPU will specify which ERT is required in your situation and in which programming mode it must be.
100 Cubic feet (CCF) is the standard unit of measure for meter reading and billing at SPU.
Yes. If you choose not to meet current SPU standards, SPU will remove the sewer deduction from your account and revert your billing back to the standard method of sewer charges based on water delivered.
Yes however, the meter must meet all current SPU submeter requirements and be preapproved.
There are three general types of meters: mechanical, ultrasonic and electromagnetic.
Mechanical meters with a single measuring chamber work well for deducting clean, cold, potable water. Multi-register meter are rarely necessary. Ultrasonic or Electromagnetic meters work well for measuring discharge from pools, fountains, cooling towers, beverage production, and other industrial processes.
The smallest size capable of registering your maximum flow requirements. 2” and smaller meters are typically required for all discharge meters. 3” and larger meters are much more expensive than smaller meters and are rarely necessary. Contact your equipment supplier to determine which meter will work best for your application.
Yes provided each system meets SPU requirements. Example: The supply for multiple cooling towers can be measured by one deduct meter. The overflow, drain and chemical blow-down discharge lines from multiple cooling towers can be measured by one chargeable meter.
Meter size, space constraints, temperature of liquid to be measured, contaminants in the discharge, flow range (velocity) and that the meter meets all SPU requirements detailed in your individual compliance plan.
Yes, all submeters must be installed according to the manufacturer’s recommendation.
An inverted p-trap will keep a chargeable submeter flooded with water so the meter registers accurately and prevents positive air pressure from cooling towers or other equipment from moving the meter register.
Over the years, property owners, tenants, businesses, equipment and technology will change and may no longer qualify for the same deductions using the same equipment. In some situations submeters previously not required may now be required.
Submeters and ERTs are both available from local plumbing suppliers. Specify that you need to meet Seattle Public Utilities requirements and refer to the submeter compatibility list maintained on the SPU website. Any qualified plumber or mechanical contractor should be able to install the equipment. SPU does not maintain a list of contractors.