Seattle Public Utilities

Hydrants Permit

Seattle Public Utilities (SPU) must approve and issue a hydrant permit before you can temporarily use a hydrant for a project site or to fill a tanker truck.

Before you can use a hydrant, you must:

  • Meet all backflow protection requirements before you can use any hydrant water.
  • Always keep the following documents on hand when using a hydrant:
    • Hydrant permits
    • Passing backflow assembly test reports
    • Satisfactory tanker fill inspection reports (if applicable)

There are 2 types of hydrant permits:

  1. Filling tanker trucks
  2. Direct connections to a hydrant

The permit option you select will determine the permit requirements. For more information, refer to WTR-460.1 - Use of Hydrants by Others (Directors Rule).

How do I get a hydrant permit?

Complete a hydrant permit application (docx).

Once you submit your application, we will perform a review. If approved, we will issue an invoice based on the estimated costs below.

Estimated costs

If using an SPU-issued hydrant or more than 10 CCFs a day

  • Hydrant permit fee: $214
  • Hydrant meter fee $304

If using a private hydrant assembly and less than 10 CCF’s a day

  • Hydrant permit fee: $214
  • Sept 16 – May 15: $45 per day
  • May 16 – Sept 15: $57 per day

How long will it take to issue a hydrant permit?

A hydrant permit will be issued 48 hours after your hydrant permit application and payment is received.

Hydrant meters are typically scheduled for delivery within 5-7 business days of receiving your application and payment. Hydrant meters are delivered Tuesday through Friday.

Permit length

Your hydrant permit is effective until the expiration date on the permit.

We issue permits for no more than 6 months. Using hydrants after the permit expires is illegal and subject to a fine.

We may cancel your hydrant permit if you don't follow hydrant requirements. You must pay for any damages caused by non-compliance, such as:

  • Hydrant repair
  • Hydrant replacement
  • Backflow response efforts
  • Consumption on meter or daily rate