Backflow Installation and Testing

Backflow prevention devices prevent dirty water from entering the clean water line. This helps to keep your family healthy and safe. NYC Local Law 152 specialists may require a backflow prevention device on your potable plumbing system. Backflow Installation

A backflow preventer costs, on average, around $300 to install. This price includes both parts and labor. The cost can vary depending on the location where the backflow preventer is to be installed. For example, a backflow preventer for sewers will cost more than one installed in a basement.

Backflow prevention devices are important because they help protect drinking water from contamination. Water that flows backward through your plumbing system can contain chemicals such as pesticides, fertilizers, human waste, and soap. This can contaminate your home’s drinking water or the municipal or public water supply. It is a safety hazard because it can also carry bacteria such as Salmonella, Campylobacter jejuni, and cyanobacteria. Salmonella causes approximately 26,500 hospitalizations every year in the states.

The cost of installing a backflow preventer is usually much less than the cost of a water-borne disease outbreak. If you live in an area where the drinking water has a high risk of contamination, your local water utility will require that you install a backflow prevention device. Backflow preventers are typically installed in plumbing “cross-connections.” Cross-connections are points where potable water and non-potable (grey) water meet, such as a shower head gooseneck and a dishwasher drain line.

Most modern plumbing fixtures have built-in backflow protection that eliminates the possibility of dirty water flowing into clean water. This type of backflow protection uses an air gap at the end of a spout or a fill valve. Shower head goosenecks, bathtub faucets, toilet fill valves, and clothes washer drains use this type of backflow protection.

Many cities and counties require backflow preventers for homes connected to their municipal or public drinking water. The city water authority will test and inspect the backflow prevention device annually to ensure it is working properly. A homeowner may have to pay a fee for the testing of their backflow device.

A backflow preventer for sewers can be installed in an above-ground or underground utility vault. Above-ground vaults are more cost-effective. They are also more secure. Underground vaults, however, are subject to flooding and need extra safety precautions when tested. This can include gas detection, fall protection, and ventilation.


Backflow preventers protect drinking water by ensuring that it only travels in one direction. This is important to ensure that your home’s plumbing system stays sanitary and safe. In addition, it protects your community’s water supply from contaminants and pollutants.

Installing a backflow preventer requires specialized knowledge and skills. A licensed plumber should perform this installation to ensure that the device is installed properly and in compliance with local regulations. In addition, a backflow preventer should be tested annually to ensure that it is functioning correctly.

There are many different types of backflow prevention devices, ranging from simple check valves to air gaps and pressure vacuum breakers. Your plumber will determine which type of device is best suited to your needs. Once the backflow prevention device has been installed, it must be maintained and inspected by a certified technician to ensure that it is working properly.

The most common way backflow contamination can occur is through cross-connections. This can happen in any pipe that connects clean water with dirty water. Backflow contamination can also occur due to a significant decrease in water pressure. This can occur when a backpressure relief valve fails, pipes burst, or firefighting equipment uses the water main.

In order to minimize the risk of contamination, a backflow prevention device should be located at the point where clean and dirty water meet. This is typically near the water meter or where the main water line enters the property. A backflow preventer should be installed at a location that is accessible and easily visible. A backflow preventer should also be placed in a protected enclosure to protect it from tampering and harsh environmental conditions.

Depending on the type of backflow prevention device, it may be necessary to have it tested annually. Those that are considered testable require annual testing and a tag that is valid for five years. Non-testable devices include dual check valve assemblies, passive purge systems, and reduced pressure principle devices.


Backflow testing is a vital service that ensures your property’s plumbing system works properly. Many localities require annual testing to keep their water supply clean and free of contaminants. Failing to test your backflow device may result in fines or the disconnection of your water. Backflow prevention testing is performed by certified technicians who use a portable test kit to check the assembly for proper operation.

Your drinking water is pushed into your home or commercial building by pressure, but if pressure changes suddenly, dirty water can flow backwards through your pipes and into city water lines. This can contaminate the city’s water supply with human waste and chemicals. Backflow prevention devices are designed to stop this from happening by assessing pressure levels and stopping dirty water before it reaches the clean supply.

These devices are commonly installed at commercial or residential hose bibs and fixtures that have a direct connection to the public water supply. The devices are also known as isolation, point of use, or backflow preventer assemblies. They are tested and certified annually by licensed backflow testers to ensure they are working correctly. There are two types of backflow preventers: double check valve assemblies and pressure vacuum breaker assemblies (PVBA).

Each type of device has its own installation procedures, but they all require regular maintenance and inspection. The maintenance schedules vary based on the type of device and its location. A certified backflow inspector can recommend the best maintenance routine for your specific needs.

Before the backflow testing process can begin, a plumber will shut off the water at your backflow device and take several pressure readings to determine its operating range. Then, he or she will open and close the valves on your device while watching for pressure fluctuations. Once the backflow device passes the test, a certified Kiddco technician will reinitiate your water service and fill out the necessary paperwork.

Backflow testing can be dangerous and must only be conducted by a trained, certified technician. Some backflow testing sites are considered confined spaces, so your certified technician will follow specific entry and exit protocols to avoid any potential dangers. This includes not breathing in hazardous gases and avoiding contaminated dirt or debris.


A backflow preventer is a great way to protect your home or commercial water supply from contamination. However, it must be properly maintained to keep contaminants out of your clean drinking water. This process involves a thorough inspection of the device by a technician certified to service backflow prevention devices. This technician will check the device for signs of contamination and other issues that could cause problems.

In addition, the technician will flush the device to remove any sediment buildup and replace any worn or damaged parts. He will also test the device to make sure it works as intended. This maintenance process should be performed annually.

If you own a single-family residence, your backflow preventer will need to be tested once per year. If your backflow preventer is a “testable” double check valve assembly, you will need to have it retested every five years. In some cases, you may want to consider replacing your testable assembly with a non-testable double-check valve. This will allow you to avoid the testing and retesting fees that are associated with testable assemblies.

Backflow prevention maintenance includes the cleaning of the device, resetting any automatic shut-off devices, and replacing any damaged or defective rubber parts. This can be a tricky task because each backflow prevention device is different and has different repair parts. Luckily, most manufacturers provide basic repair kits that contain the replacement parts needed for the specific model of the backflow preventer.

The backflow preventer’s body must be inspected to ensure it’s clean and free of scale. It’s also important that the backflow preventer’s seals and O-rings are in good condition. If the O-rings are cracked or damaged, it’s recommended that they be replaced immediately. During backflow maintenance, it’s also important that there isn’t any water in front of the device, as this can damage it.

If you notice any unusual symptoms, such as leaking valves or strange noises, it’s vital that you contact an experienced backflow prevention specialist as soon as possible. These problems can indicate that the backflow prevention device is not working correctly. You may need to replace the entire assembly or simply repair some components.