The Town of Frederick runs a cross-connection program under state rules: assemblies must be tested when installed and every year after by a certified tester, and irrigation generally needs a reduced pressure (RP) assembly. If you need a test, a repair or an upgrade, call the number on this page to be connected with a local plumber in Frederick.
Signs you need backflow help
- A reminder that your annual test report is due to the Town
- Your irrigation line has a double check that may not meet the Town's RP rule
- A failed test needs parts and a retest
- Water spills from the relief port when the sprinklers run
- You bought a home and don't know when the device was last tested
Backflow rules in Frederick
Which water system you're on depends on which side of I-25 you live on. The Town of Frederick serves everyone east of the interstate, and Left Hand Water District serves residents to the west, with Central Weld County Water District also serving part of town. The backflow program described here is the Town's, run by its Engineering Department under Colorado health department rules.
On Town water, commercial, industrial, domestic, irrigation and fire lines need assemblies installed and tested every year. Irrigation is the strict part: the Town generally requires RP assemblies there and does not allow double checks. Single-family homes are encouraged to have their irrigation systems tested every three years. Test reports go to the Town and to its tracking partner, Aqua Backflow, and questions go to 720-382-5807.
Frederick's newer subdivisions mostly came with in-ground sprinklers, which puts a device in a lot of front yards. The Carbon Valley gets hard freezes, and an RP assembly that isn't drained in fall can split.
What moves the cost
- Annual test versus upgrade. Swapping a double check for an RP assembly is more work than testing an existing one.
- Repairs. Check and relief valve kits after a failure add parts and a retest.
- Freeze damage. A cracked body is a replacement job.
- Permits and inspection. The Town Building Department handles permits and may verify the plumber's identity at inspection.
When you call
You'll be connected with an independent plumber who works in Frederick. Tell them which side of I-25 you're on and what kind of device you have. If you're west of the interstate, your rules come from Left Hand Water District, so mention that up front. Have any past test reports or the Town's reminder nearby; they show the assembly's make, size and last result, which helps the plumber bring the right repair parts the first time.
Backflow Testing questions in Frederick
What separates an RPZ assembly from a double check?
Does an ordinary single-family house need annual testing?
Where do the test results go once the test is done?
How can I tell which water provider serves my address?
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