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Backflow Information
The official laws governing backflow testing in Oregon are found in the Oregon Administrative Rules (OAR) under the Oregon Health Authority, Public Health Division (Chapter 333, Division 061).
Key Requirements of the Law
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Annual Testing: Water suppliers must ensure that backflow prevention assemblies are tested at least annually to protect the public water system.
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Certified Testers: Backflow testing must be performed by certified professionals, such as journeyman or apprentice plumbers who have completed an Authority-approved training program.Installation Standards: This rule specifies how and where these assemblies must be installed to prevent "backflow"—which is the flow of water, fertilizers, or chemicals in the opposite direction of the intended flow.
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Record Keeping: Test results for these devices must be documented and retained for a minimum of 5 years.
Annual Backflow Testing Prepayment
Our 2026 backflow season early prepay testing prices are as follows:
Standard Backflow Assembly, per device
(Residential and Commercial devices):
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Prepaid by Friday, May 1, 2026 -- $60.00
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Prepaid after Friday, May 1, 2026 -- $80.00
Underground (Vault) Backflow Assembly, per device
(some Commercial devices):
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Prepaid by Friday, May 1, 2026 -- $115.00
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Prepaid after Friday, May 1, 2026 -- $135.00
If you would like us to test your backflow, please click the link below.
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Click the Services dropdown arrow, select the "Backflow Test" option
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Enter "Total Amount Due"
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Enter "BFTEST2026" for the Invoice Number
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Enter the Service Address where the assembly is located
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If you know your testing deadline and/or TRAC#, you may enter them in the designated boxes
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Residential customers generally have one standard backflow assembly
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Commercial customers with multiple assemblies should be confirmed before payment
You may also email reply@canddlandscape.com or call the office if you need to update your account or have questions about your backflow test before payment.