Backflow of water is quite literally the reversed flow of water. So instead of it flowing into the drainage system as it should, it flows back into the water distribution system. Causes vary, but it is commonly a result of a system stoppage or overload, or increased pressure on the drainage pipe side of the house trap.
If clean, potable water flows back into the system it won’t be harmful, but it is still undesirable. If other liquids, gases, or other substances get mixed into the water, this can contaminate the water, which can be dangerous.
Backsiphonage is caused by negative or reduced pressure in the supply piping, often because either the pipes are undersized or because the supply pressure is interrupted. The concern here is that the entire supply of potable water could be contaminated.
Backflow preventers are devices that prevent backflow. Essentially, what it does is allow water to flow in one direction only, never in the opposite direction.
Generally, a backwater valve is installed in the branch line, building drain, or sewer where there is a possibility of backflow occurring. This prevents waste or drainage from backing up into a lower level of the system, or in fixtures, causing flooding.
As mentioned above, backflow preventers are a retroactive mandatory item on all of New York City’s buildings, however big or small they are. In order to comply with their specific requirements, a professional engineering firm like ours must undertake a detailed survey of the site or drawings where the device will be located. Then the firm is responsible for submission of the design to the DEP in the form of an official application.
New York Engineers has extensive experience in backflow prevention designs and services. In fact, our success rate in terms of one-time approval is 90%. We also boast the fastest possible average turnaround from when we are hired to getting approval: just 1.4 months! Additionally, we offer a flat fee of $3,000 for backflow preventer approval. Developers, in particular, really appreciate our service.