What matters here
Arlington is unusually explicit on fire line rules. Fire sprinkler systems use a City-approved DCVA as the minimum in many cases, but an RPZ is required when anything other than potable water can enter the system.
Fire line
Arlington Water Utilities fire line backflow rules
Arlington is unusually explicit on fire line rules. Fire sprinkler systems use a City-approved DCVA as the minimum in many cases, but an RPZ is required when anything other than potable water can enter the system.
Utility: Arlington Water Utilities
Last verified: 2026-04-04
Due basis: Arlington's backflow ordinance requires testing immediately after installation, when an assembly is moved, after repair or replacement, before re-occupancy after a year of vacancy, and at least annually for assemblies protecting against health hazards. The Regulatory Authority can require more frequent testing.
Highlights
- Fire systems with non-potable-approved piping or without periodic flow-through need at least a City-approved DCVA.
- An RPZ is required when antifreeze, foam, or other non-potable solutions can enter the sprinkler system unless an air gap protects the tank.
- Testing and repair on fire lines must be performed by personnel permanently employed by an approved fire line contractor.
Workflow
Workflow
- Confirm whether the fire system can stay on a DCVA or must move to an RPZ.
- Install the fire line equipment through a state-licensed fire sprinkler system contractor.
- Have a licensed fire line tester complete and submit the cross-connection test report to the Regulatory Authority.
Residential
- Residential owners most often run into Arlington's rules through lawn irrigation permits and re-occupancy or repair testing triggers.
- A homeowner should not flatten Arlington into a generic annual rule because the ordinance splits health-hazard annual testing from other event-based triggers.
Commercial and managed properties
- Commercial and other higher-hazard premises are much more likely to sit in the annual testing lane.
- Fire protection, inspection access, and City registration requirements make Arlington more ordinance-heavy than a generic plumber quote suggests.
Tester routing
No public tester route is live for this utility yet. Stay on the official program path and confirm the scope directly with the utility.
FAQ
Local questions people actually ask
Does Arlington Water Utilities require annual backflow testing?
At installation, move, repair or replacement; annually for health-hazard assemblies. Arlington's backflow ordinance requires testing immediately after installation, when an assembly is moved, after repair or replacement, before re-occupancy after a year of vacancy, and at least annually for assemblies protecting against health hazards. The Regulatory Authority can require more frequent testing.
Who is affected by Arlington Water Utilities backflow rules?
Residential and commercial properties with health-hazard assemblies, lawn irrigation systems, fire sprinkler systems, and premises that have been vacant long enough to trigger re-occupancy testing.
How do I submit or confirm a backflow test for Arlington Water Utilities?
Use the official utility workflow and submission methods listed on this page: Water utilities department page, Arlington backflow prevention ordinance, Arlington irrigation ordinance. Program phone: 817-275-5931.
Where should I look for testers for Arlington Water Utilities?
No public tester directory is live for this utility yet. Use the official utility page first and do not infer approval from a generic directory.
Official sources
Arlington Water Utilities
Arlington is unusually explicit on fire line rules. Fire sprinkler systems use a City-approved DCVA as the minimum in many cases, but an RPZ is required when anything other than potable water can enter the system.
official department page
Arlington backflow prevention ordinance
Arlington is unusually explicit on fire line rules. Fire sprinkler systems use a City-approved DCVA as the minimum in many cases, but an RPZ is required when anything other than potable water can enter the system.
official ordinance
Arlington irrigation ordinance
Arlington is unusually explicit on fire line rules. Fire sprinkler systems use a City-approved DCVA as the minimum in many cases, but an RPZ is required when anything other than potable water can enter the system.
official ordinance