San Diego DMA · reduced pressure zone
RPZ backflow testing
An RPZ (reduced pressure zone) assembly is the high-protection device on many commercial, irrigation, and fire lines. It has relief ports that spit when something is wrong. It also fails tests more often than a simple double-check. Request a certified test. This page does not perform it.
How to recognize the device
An RPZ is usually a brass assembly with a relief valve in the middle and two shutoffs. It sits above ground more often than a double-check. If the tag says RP or RPZ, write that.
If the relief valve is discharging steadily, that is a fail in progress. Put “relief dumping” on the request. It is not a flood emergency by itself, but it is not a passing device.
Why RPZs are their own job page
The test procedure has more steps and more ways to fail. Rebuild kits are specific. Some testers will test but not rebuild. Write if you want repair on the same visit if it fails.
We cannot promise a same-visit rebuild. Ask the person who calls.
Typical cost — not a bid
The test fee is often in the same $75–$175 band as other assemblies. An RPZ rebuild is commonly a few hundred dollars ($200–$600+ is typical talk) plus a retest. A full replacement on a large or fire-line RPZ can reach $800–$2,500+ depending on size and the pipe around it.
Typical ranges. Not a quote. Not a guarantee of a pass.
Fire-line devices
If the assembly is on a fire service, say so. Access, shutdown, and who has to be notified are different from an irrigation cage. This site does not call the fire department and does not take a fire line out of service from a form.
Related guides
Short explainers that point at this request. They are not a site visit and not a bid.
Local statistics
San Diego backflow testing statistics, 2026 — public-record figures, not a bid from San Diego Backflow Testing.
Related pages
These are more request pages on this site, not a list of partner shops. A licensed local provider may contact you if they accept a lead.
Request rpz testing in San Diego
Call if you want to talk now, or send the form. Either way this is a request, not a booked job.
Call (619) 604-7252