The type of backflow preventer you need depends on what's on your side of the meter. High-hazard uses like medical offices or chemical irrigation need an RP. Lower-hazard lines can use a double check. Irrigation often uses a PVB or SVB. Your district has the final say, and we confirm it before we quote.
- PriceFree quote
- TimeUsually 1 day
- TestIncluded
- FilingIncluded
Want to get on the schedule? Call or book online.
How we choose
- District rules
- Flow and pressure needs
- Hazard level at the connection
- Available space and access
Matching the device to the risk
What could flow backward into the water supply determines which preventer you need. Water districts sort connections by hazard and approve specific devices for each.
High-risk uses, including clinics, dental offices, car washes, chemical injection and many restaurants, usually need an RP or an air gap. Lower-risk connections, like many fire sprinkler services, can often use a double check. Sprinkler systems exposed only to backsiphonage may use a PVB or SVB.
The district decides. We check its requirements for your connection before quoting, so the device we install is one they'll accept.
Sizing the device
A backflow preventer has to be big enough to pass the water your property uses without dropping pressure too much. Every device causes some pressure loss, and an undersized one can leave upstairs fixtures weak or sprinklers sputtering.
We look at the pipe size, the peak water demand and the pressure available at the meter. For most homes in Corona, that points to a 3/4-inch or 1-inch device. Commercial buildings and fire lines often need 2 inches and up.
Bigger isn't always better either. An oversized device costs more, takes more space and can be harder to keep passing. We size it for what you actually use.
Paperwork before the install
Many water districts want to know about a new backflow device before it goes in. Some require plans for commercial installs, some only need the first test report afterward. Cities may require a plumbing permit, especially on commercial jobs or when the device is going on a fire line.
We'll tell you what's likely needed for your project and include it in the plan. If a permit is required, the timeline accounts for it.
After installation, the device is tested and the first report is filed. That puts it on the district's list and starts its annual testing schedule.
Common reasons for a new preventer
New construction is the obvious one: every new commercial building and many new homes with irrigation need backflow protection before water service is finalized.
Adding or changing equipment comes next. A new sprinkler system, pool, boiler or fire sprinkler service often triggers a requirement. So does a change of use, like turning a store into a restaurant or an office into a clinic.
Sometimes a district survey finds a connection that should have been protected all along. Whatever the reason, the steps are the same: confirm the device type, size it, install it and file the first test.
Preventers for sprinkler systems
New sprinkler systems and big landscape renovations are among the most common reasons for a new preventer. Depending on the district and the system, irrigation may use a PVB, an SVB, a double check or, with fertilizer injection, an RP.
We'll look at the yard's slope, where the valves are and whether any chemical feed is planned, then recommend the device and location that fits.
Larger preventers
Commercial projects usually mean bigger devices plus plans, permits and coordination with other trades. Fire services typically use detector assemblies of 4 inches or more.
We coordinate with your contractor so the device goes in at the right stage and the startup test is complete ahead of final inspection.
What a quote includes
Every installation quote lists the device type and size, the labor, any fittings or piping changes, and protection like a cage or cover if you want one. It also includes the startup test and filing the first report with your water district.
If permits are needed, we'll say so and include them or explain how they're handled. There's no charge for the quote, and you'll know the total before we schedule the work.
Already have a device that seems like the wrong type? We can review it against your district's requirements and tell you whether it needs to be replaced or can stay.
Need help deciding?
See our RP vs. double check vs. PVB guide, or call and we'll look at it with you.
Questions
Will my district need to approve it?
Many do. We check the requirements and handle the paperwork with you.
Is installation priced up front?
Yes. You get a free quote after we look at the site.
Can the wrong size cause problems?
Yes. Too small can drop pressure, and too big can cost more and be harder to keep passing.
Will the district add the new device to its records?
Yes. Filing the first test report puts it on their list and sets the first annual due date.
Can I install a PVB instead of an RP to save money?
Only if your district allows it for your hazard. For high-hazard uses, an RP is usually required.
Do you pull permits?
When a permit is required, we let you know and include it in the plan.
What to expect when you book backflow preventer installation
Booking takes a couple of minutes by phone or online. We confirm the address, the device and how to reach it, and we'll give you a time window that works for you. For most homes, you don't need to be there.
On the visit, a certified tester does the work with a calibrated gauge and explains anything that comes up in plain terms. If a repair is needed, you'll get the price before anything happens. When the device passes, we send the report to your water district and email you a copy. Our office is open seven days a week, 6am to 12pm, and emergency calls are answered around the clock.
Backflow Preventer Installation in Corona and nearby
Need backflow Preventer Installation outside Corona? We also cover Norco, Eastvale, Home Gardens, Weisel and Arlington. Same-week visits are normal, and booking takes a couple of minutes.