Backflow Prevention in San Diego
What is the backflow problem?
Backflow is a plumbing problem that occurs when the direction of water flow reverses. This can cause contaminated water to flow back into the clean water supply system, which could lead to serious health risks.
The major problem with backflow is that it can cause contaminants to enter the clean water supply. This can happen if a hose is left in a pool or a container of chemicals, and backflow occurs. The contaminants can then get sucked back into the clean water supply.
Backflow preventers are designed to stop this problem by ensuring that water only flows in one direction in the system. They are critically important in protecting the quality and safety of our drinking water supplies.
What is a backflow preventer?
A backflow preventer is a device that’s installed on a water pipe that allows water to flow in one direction but never in the opposite direction. Its sole job is to prevent drinking water from being contaminated due to backflow.
There are a variety of backflow preventers available, including pressure vacuum breakers, double check assemblies, and reduced pressure zone assemblies. Each has a specific application and all have been tested to perform under specified conditions.
Here’s a brief description of how is backflow prevented:
- Pressure Vacuum Breakers (PVBs): these are installed on the main water line, and they work by breaking the vacuum that can be created in the water line due to sudden changes in water pressure. This prevents contaminated water from being sucked back into the water supply.
- Double Check Valve Assemblies (DCVAs): these consist of two check valves installed in series. This setup allows water to flow in one direction, but not the other. These are often used in low-hazard situations where the risk of contamination is small but still possible.
- Reduced Pressure Zone Assemblies (RPZAs): these are used in high-hazard situations. They consist of two check valves, similar to a DCVA, but also include a pressure differential relief valve. If either check valve leaks, the relief valve will open to maintain a reduced pressure zone between the two check valves, ensuring that contaminated water doesn’t flow back into the water supply.
Each type of backflow preventer needs to be installed and maintained correctly to ensure that it functions properly. This usually involves annual testing by a certified backflow prevention device tester.
Our plumber will advise you on the best type for your home and what the local government requires.
Why are backflow preventers used?
Backflow preventers are used to protect potable water supplies from contamination or pollution due to backflow. In water supply systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture.
Backflow can happen for two main reasons:
- Backpressure: this can occur if the pressure downstream is greater than the pressure of the water supply, causing the water to flow backwards.
- Backsiphonage: this can occur if there’s a sudden reduction in the water supply pressure (for example, during water line repairs, during a fire when hydrants are opened, or when there is a break in the main water line). The reduced pressure can create a suction effect, causing water to flow backwards.
A backflow preventer is designed to prevent both of these situations, protecting the potable water system from contamination. These devices are important components of irrigation systems, boiler systems, and other setups that could potentially contaminate a water supply.
Backflow testing
Testing these devices requires specialized knowledge and equipment, and should be performed by a certified professional. Here is a general overview of how the process might look:
- Preparation: the tester will first shut off the downstream shutoff valve (the valve on the output side of the device). They will then attach their test kit to the test cocks on the backflow prevention device. The test kit usually includes pressure gauges and hoses.
- Testing the First Check Valve: the tester will open the test cock for the first check valve (closest to the inlet) and observe the pressure reading. They will then close this test cock and open the next one. The pressure should hold steady, indicating that the first check valve is not leaking.
- Testing the Second Check Valve: the tester will repeat this process with the second check valve. Again, the pressure should hold steady, indicating that the second check valve is not leaking.
- Testing the Relief Valve (for Reduced Pressure Zone Devices): the tester will create a drop in pressure between the two check valves to ensure that the relief valve opens. They can do this by opening the test cock for the first check valve and partially closing the downstream shutoff valve. The relief valve should open, and water should be released from the device.
- Recording results: the tester will record the results of each test and provide a report. If the device fails any part of the test, it will need to be repaired or replaced.
This is a simplified overview of the testing process, and the actual process can be more complex, depending on the type of backflow preventer and the specific circumstances. If you have a backflow prevention device that needs testing, it’s best to hire a professional from Almco Plumbing, who is certified in backflow prevention device testing.
How often should backflow prevention be inspected
Backflow prevention devices should typically be inspected and tested at least once a year. This annual testing helps ensure that the device is working correctly and protecting your potable water supply from potential contamination.
Some jurisdictions or water purveyors may require more frequent testing, particularly for higher-risk scenarios. For example, backflow preventers in healthcare facilities or industrial settings may need to be tested more often due to the increased risk of contamination.
After testing, if the backflow preventer is found to be malfunctioning, it should be repaired or replaced as soon as possible. Regular inspections and maintenance are key to ensuring the safety and effectiveness of backflow prevention devices.
How do I know if I have a water backflow prevention device?
A backflow prevention device is usually located near your water meter or where the water line enters your home or property. The device is typically made of brass and has a series of valves and test cocks (small ball valves) on it. Here are some steps you can follow to identify if you have a backflow preventer:
- Check near the water meter: look for the device near your water meter. The water meter is usually located at the point where the water line enters your property. In many cases, the backflow preventer will be installed after the meter.
- Look for a brass device: backflow preventers are typically made of brass. They often have a shape similar to an elongated “U” or “n” and have shut-off valves on either end.
- Identify test cocks and shut-off valves: backflow preventers will have test cocks, which are small valves used for testing the device. There will typically be two to four of these, and they are usually smaller than the shut-off valves. There should also be two larger shut-off valves, one on either end of the device.
- Look for a pressure relief valve: if you have a Reduced Pressure Zone (RPZ) backflow preventer, there will be a pressure relief valve in the middle of the device. This valve will open if either of the check valves fail, discharging water and maintaining the pressure zone.
If you’re unsure whether or not you have a backflow prevention device, or what type of device it is, it may be best to call a professional from Almco Plumbing. A licensed plumber or a certified backflow prevention device tester can help identify the device and can also perform necessary testing and maintenance.
How does a backflow preventer work?
Water should only ever flow in one direction: into your building or home. But sometimes, due to pressure changes in the pipes, that water can flow backward and seep into the main water supply line.
During regular operation of the backflow preventer, the pressure between the two check valves – referred to as the zone of reduced pressure – is maintained at a lower pressure than the supply pressure. If either check valve should leak, the relief valve is designed to open and discharge water to the outside, ensuring backflow never occurs.
Remember that backflow preventers need regular testing to keep your drinking water clean.
Why do you need a water backflow preventer?
There are many reasons to consider having a residential backflow preventer installed. Here are the main ones:
- Keeps pollutants — germs, bacteria, organic waste, and harmful chemicals — out of the water supply, which in turn makes the water look and taste clean.
- Protects your water and sewer system from expensive repairs resulting from the damage of pipework and entry of foreign materials.
- Compliance with the legal requirements in areas where the installation of backflow preventers is mandatory.
A backflow preventer can eliminate the contaminants from your drinking water, keeping you and your family safe and healthy.
Backflow preventer installation in San Diego
The Uniform Plumbing Code requires all properties to have an adequate backflow preventer in order to eliminate accidental water supply contamination. Municipalities throughout California have been aggressively enforcing this new requirement. So, keep a high quality of drinking water – install a backflow preventer with Almco Plumbing!
What are the types of backflow preventers?
- Air Gap
- Hose Bib Vacuum Breaker
- Atmospheric Vacuum Breaker
- Pressure Vacuum Breaker
- Double Check Valve
- Reduced Pressure Zone Device
Our plumber will advise you on the best type for your home and what is required by a local government.
Leave us a request for a backflow preventer installation
Give us a call! (858) 905-5719. We are ready whenever you are. If you want to install or test a backflow preventer, feel free to call our experts today. Our professional, certified, licensed plumbers are always on standby to fix your problem. Plus, they can show up for emergencies, so you’ll never have to handle them! Contact us to find out more about our offers and schedules in San Diego, CA. Or just fill out the form below.
FAQ
How much does backflow preventer installation cost?
We call the cost of backflow prevention only after estimating the amount of work. We do our best to be as honest and accurate as possible. You can count on our backflow prevention prices to be affordable and consistent with the quality of service.
How can I book backflow prevention service?
It is very easy to book a backflow prevention service with us. You can go to the bottom of the page and fill out a short form. Or you can go to the Booking page and leave your contacts there. Choose a convenient day for you and be sure – we will arrive at the specified time.
Why choose Almco plumbing for backflow prevention services?
The plumbers from Almco have more than 10 years of experience in backflow preventer installation. Before the procedure, we carry out a thorough plumbing inspection in order to accurately assess the scope of work and select a method that will preserve the pipes. Our prices are fair, and our specialists work carefully. We are always polite and punctual.
Are you installing backflow preventer near me?
Yes, if you live in San Diego. You can book backflow preventer installation if you live in Clairemont, Miramar, Point Loma, Santa Fe, Kensington, Ocean Beach, and other areas of San Diego. A complete list of places where we work can be found on the Areas Served page.
Do I need a backflow preventer in my house?
Yes, you do. According to Uniform Plumbing Code, all properties are required to have a backflow preventer in order to eliminate accidental water supply contamination. You can benefit from a backflow preventer because it keeps water clean and fresh. A backflow preventer also protects your sewer system from expensive repairs.
