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Backflow Prevention Device Testing, Repair & Installation

The importance for property owners to ensure their plumbing is fitted with a backflow prevention device can’t be overstated. Also, It only takes one property to contaminate the entire water supply of all other properties connected to it. Also, Make sure your property is properly protected from the significant liabilities that could be faced from not having a backflow device installed by getting a professional  plumber do the job .
Cross-connections cause backflow. These are sites where non-potable liquids, gases, or solids might come into contact with a water supply. Backflow may be caused by a variety of cross-connections, including garden hoses, which are the most prevalent source of backflow. Cross-connections can cause backflow. Non-potable liquids, gases, or solids may come into contact with a water supply in these regions. Garden hoses, which are the most common source of backflow, are just one example of these cross-connections.

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Backflow Prevention for Commercial Business

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From hotels to schools, Everest Plumbing serves all sizes and types of commercial locations. We have the necessary equipment and training to provide best plumbing services wherever you need them. We are certified and master plumber and follow the entire city’s rules and regulations. Our plumbers are not only trained but also are experienced to handle such types of commercial plumbing services. So, either you manage a simple restaurant or a commercial complex. We will handle all your commercial plumbing needs.

backflow device
Backflow Device

What is Backflow?

backflow prevention device

Backflow is a phrase used in the plumbing industry to describe an unintentional flow of water in the opposite direction. Contamination of potable water systems with filthy water can pose a major health danger. Backflow prevention devices are used to prevent contamination or pollution of potable water supply due to backflow. Water pressure is generally maintained at a high level in water distribution systems to allow water to flow from the tap, shower, or another device.

What causes Backflow?

causes of backflow

Cross-connections that have the potential to introduce pollutants into the drinking water system create backflow. When the pressure in a tank or water trough is lower than the pressure in the water system, back siphonage can occur. This might allow tainted water to enter the system by dragging it in.

We are certified and licensed and follow the entire city’s rules and regulations. Our pLumbers are not only trained but also are experienced to handle such types of commercial plumbing services. So, either you manage a simple restaurant or a commercial complex. We will handle all your plumbing issues.

Listed below are the major causes of backflow in commercial and residential properties.

  • Back Pressure

    Back pressure is the term used for pressure that pushes gas or water in the ‘wrong’ direction. This most often happens when heaters are not provided with efficient vents or outlets. It causes the pressure inside to rise at the time when the water is being heated up.

  • Back-siphonage

    This arises when the pressure in the water supply piping becomes significantly lower than the external pressure (or that in the plumbing system). Back-siphonage typically occurs in toilets and sinks. Unless preventive measures are applied, this is very likely to occur.

  • Sewerage pipe damage

    The sewerage pipes are carrying the waste water from your home to the local water system. Because everything is subject to wear and tear, these pipes suffer damage over time. Once they do, it will cause backflow. The signs are very obvious, so it is possible to take action right away. Foul smell and leaks from your drains are the primary indicators of sewerage pipes damage

  • Local source damage

    There are also some rare occasions where the cause of the problem cannot be detected in

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How to prevent backflow?

Backflow can be prevented with backflow prevention devices and can be installed in any number of places. For commercial properties and newer residential properties, there is a larger backflow prevention device that prevents wastewater from the property from entering the city’s water supply. These backflow prevention devices

Backflow prevention regulations

Law requires that authorized backflow prevention assemblies be installed in line with plumbing or building requirements. Backflow assemblies often include test cocks and shut-off valves, and they must be checked when installed, moved, or repaired, as well as on a regular basis. Backflow preventers must be installed at least twelve (12) inches just above floor but no more than four (4) feet above ground on the inside, with sufficient room around the backflow preventer for testing and/or maintenance.

On water main connections used for construction and renovation, a backflow protection device is required. We consider it a significant  backflow threat if you’re developing more than one stand-alone dwelling.

Backflow prevention devices for commercial business

There are two main categories of backflow prevention devices.

Testable backflow prevention assemblies are required for use at a service connection, but may also be used for internal protection. Since their proper function is imperative in order to prevent contamination of the public potable water supply, a method of testing is necessary. Below are types of testable backflow prevention assemblies.

  • Reduced Pressure Principle Backflow Assemblie
  • Double Check Valve Assemblies
  • Reduced Pressure Principle Backflow Assemblie
  • Pressure Vacuum Breakers

Non-testable backflow devices are usually used for internal protection, within the consumer’s potable system. If these types of valves fail, protection of the public potable supply is still facilitated by the testable assembly installed at the service connection.

commercial backflow device installation

Commerical Backflow Device Installation

Backflow prevention devices testing repair

When testing the device, the backflow certified plumber will switch off the downstream shut-off valve and wait a few minutes before linking up test kit hoses to check the pressure in the system. The plumber is essentially looking for places where the pressure isn’t quite right. Backflow prevention assemblies that can be tested are necessary for usage at a service connection, but they can also be employed internally. A technique of testing is required since their correct operation is critical in order to prevent pollution of the public drinkable water supply.


  • Backflow Preventation Device Testing
  • Backflow Repair
  • Backflow Installation
  • Backflow Replacement

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Backflow is a plumbing term that describes the unwanted flow of water in the opposite, unintended direction. If backflow occurs, potable water can become contaminated with wastewater..

  • 1. Does my water system require backflow prevention?

    Missouri’s backflow prevention regulation (10 CSR 60-11.010) applies to all community waters stems. These are water systems that serve at least 15 connections or at least 25 people on ayear-round basis. Missouri has more than 1,400 community water systems. They serve morethan 4.9 million people, almost 90 percent of the state population

  • 2. Must my home or business have backflow prevention?

    Many businesses must have backflow prevention. Common examples are manufacturing andprocessing plants, medical facilities, laboratories (including school chemistry and biology labs),and buildings that have boilers, fire sprinkler systems and irrigation systems.Solely residential facilities are exempt from the rule unless a specific cross-connection isidentified. For example, single-family residences with a lawn irrigation system requirebackflow prevention. Multi-family residences with a boiler or fire sprinkler system requirebackflow prevention.Call your local water supplier to confirm whether or not backflow prevention is requiredat your home or business.

  • 3. What kind of backflow prevention is required at my home or business?

    Under the Missouri rule, three types of backflow prevention assemblies are permissible forcontainment: air gaps, reduced pressure principle assemblies and double check valveassemblies. The type of assembly you need depends on the type of hazard present.Generally, where you have a backflow hazard that may threaten public health you must havean air gap or a reduced pressure principle assembly. Where there is a lesser hazard that maydamage the water system or degrade the aesthetic quality of the water, a double check valveassembly is required. Only approved backflow prevention assemblies may be used. If you can find the manufacturerand model number on your assembly you can check with your water supplier to find out if it is anapproved assembly. Modifications to an assembly invalidate the approval. If your assembly lookslike it has been changed, get in touch with your water supplier or a certified backflow preventionassembly tester to see if it is an approved assembly.Water suppliers may have more strict or specific requirements than the state rule. Contact yourlocal water supplier to make sure you have the appropriate backflow prevention assembly tomeet local requirements.

  • 4. Must I have my backflow prevention assembly inspected?

    Yes. To ensure the device is functioning properly, a certified tester must test it at least annually.For new facilities, the assembly must be tested when installed. If the tester finds the assembly isnot working, you must arrange to have it repaired and tested again. It is your responsibility to payfor the test and repairs. The tester is required to provide a copy of the test report to you and thewater supplier. To obtain a list of certified testers in your area, call your water supplier or theMissouri Department of Natural Resources.

  • 5. Does the backflow prevention assembly protect my entire facility?

    No. The required backflow prevention assembly provides containment and it protects the publicwater system from hazards in your facility. Cross-connections in your own plumbing may allowcontaminants to backflow from hazardous processes to drinking water taps in your building.Backflow prevention applied within a facility to protect drinking water plumbing from processplumbing is called isolation. Isolation backflow prevention is not covered by departmental rules, but may be required by local plumbing codes. Check with your local code enforcement agenciesto see what standards apply to your facility.

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