A 2 backflow preventer is actually referred to as a 2” back flow preventer, and it refers to the size of the actual device. They come in sizes ranging from ½ inch to two inches. To know what you need, find the backflow testing mechanism and measure the intake valve on that mechanism.  The size is also stamped on the backflow pipe.

What is a backflow preventer?

It is exactly what it says it is, a device which prevents backflow from happening, and backflow is the reversal of water flow within your water distribution system. In other words, instead of water flowing from the City water supply to your fixtures, it can flow from your fixtures to the water supply. This is a health hazard, obviously, as polluted water should never flow back to the potable water supply. To avoid this from happening, local, state, and federal regulations require approved backflow preventers be installed and regularly tested for working efficiency.

Are there different types of backflow preventers?

Yes there are. The three most common backflow devices are the dual check valve, the reduced pressure backflow preventer, and the vacuum breaker.  Although they vary in construction, they all work on a very simple approach:  only allow water to flow in one direction, the direction it was intended to flow.

Although simple in design, it must be noted that all backflow devices are mechanical in nature, and as such they are prone, sooner or later, to fail and need repair and/or replacement.

Are there backflow regulations?

Most definitely, and they all stem from the Clean Water legislation passed in the 1970’s.  There are, in fact, local, state, and federal laws and regulations governing backflow prevention, so great is the health hazard of back flow.  Check with your local city for exact requirements, but generally speaking all backflow devices must be tested and inspected annually to ensure their proper working condition, and that testing must be conducted by a certified backflow tester and not just by a plumber.  If repairs or a new one is needed, the repairs and installation must be done by a certified backflow tester professional, and all parts used must be certified as backflow approved.

To put it another way, backflow is a big deal, and it is treated as such by governing bodies.

Does your property fall under backflow regulations?  The only way to know that is to check with your city’s backflow regulating body.  They will be able to tell you if your property falls under the backflow regulations for annual inspections and testing.  A certified backflow inspector will also be able to determine whether you need a 2 “ backflow preventer or one of a different size.

About City Backflow Testing

City Backflow Testing is certified in most cities and towns in the Greater Fort Worth area.  For information about backflow, about backflow preventors, or for rates and appointment scheduling, give us a call at (817) 996-2000.  We are standing by to answer your questions and to give you the very best in backflow service.  Trust the pros at City Backflow Testing.