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. Temporary use of hydrants is only authorized when there is no other source of water for the project site.

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 two 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 rental permit application (pdf). When completed, please email the application to spu_dso@seattle.gov or contact (206) 684-3333 for other submittal options.

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

1. An SPU-issued hydrant meter assembly (HMA) is used for tracking water consumption when:

  • Water usage exceeds 10 CCFs per day, OR for 
  • Hydrant usage exceeds 30 days

The estimated costs are:

  • Hydrant use permit: $215
  • HMA rental $305
  • Billed for consumption based on HMA read at end of project

2. You are charged per day when:

  • Water usage is less than 10 CCFs a day, OR
  • Hydrant usage is less than 30 days.

The estemated costs are:

  • Hydrant use permit: $215
  • Billed for each day of hydrant use:
    • Sept 16 – May 15: $54.40 per day
    • May 16 – Sept 15: $68.60 per day

For more information on charges, refer to FIN-220.1 - Customer Charges (Director's Rule).

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