Updated October 23, 2026. Reviewed by Mr. Backflow for service scope and pricing. General information only; your water district and the accepted service agreement control the requirements for a specific property.
What Property Owners Need to Know
Mr. Backflow’s published rate is $90 for eligible domestic or irrigation backflow devices 2 inches and under. Certification and district filing are included. Eligible devices larger than 2 inches through 3 inches require team review. Carlsbad residents receive a separate approved local rate of $73.80.
The Published Testing Price
Eligible domestic or irrigation assemblies 2 inches and under are $90. The price includes the certified test and district filing when applicable. The district still controls its processing, record matching and acceptance.
Commercial and Multi-Device Testing
The published standard rate can apply to a qualifying commercial domestic or irrigation device within scope. Properties with several assemblies can request a combined quote so the team can review device count, sizes, locations and access together.
When the Request Needs Team Review
Eligible devices larger than 2 inches through 3 inches, unusual access conditions, uncertain system types and requests involving multiple locations need review before pricing or scheduling is confirmed.
Mr. Backflow provides certified testing, repairs, replacements, and installations for backflow preventers up to 3 inches. Fire systems and larger assemblies are not included in our service scope.
Why the Water Provider Still Matters
The City of San Diego states that assemblies in its program require annual testing, but some San Diego addresses are served by other water agencies. The provider on the current notice or bill controls the record, deadline and filing process for the property.
Compare Written Scope, Not Just a Headline Price
A useful comparison confirms the device size and system, certification, filing, access assumptions, added repair authorization and any separate charges. A website price should not be treated as approval for work outside the published scope.
Practical Checklist
- Confirm the serving water provider
- Have the current test notice or assembly record ready
- Count every device included in the request
- Record the device size and system type if known
- Ask for a combined quote when the property has multiple assemblies
Frequently Asked Questions
What is included in the published backflow testing price?
Does the same rate apply to commercial properties?
What if a property has more than one backflow device?
Is the Carlsbad resident rate available throughout San Diego County?
Official Sources and Further Reading
Requirements can change. Confirm the current rule with the water provider responsible for the property.
Ready for the Next Step?
Have the property address, water district, device size and requested work ready. We’ll confirm your appointment after we review your request and availability.
Request service