RSS

Why is a backflow preventer necessary in my piping system?

WP Law - Thursday, October 06, 2016
sprinkler system

When talking to an irrigation specialist, you will hear a lot of jargon. One of those is backflow, which goes along with backflow preventer valves. Your installer will no doubt tell you how important it is to prevent backflow.

What is backflow?

Backflow is when water (or another fluid) flows through a piping system in the wrong direction. It is most often caused by a sudden drop in water pressure, which can happen any time you are attached to a municipal system – like if the fire service opens a hydrant a few streets over.

Why is backflow from your irrigation or piping system bad?

Any kind of backflow is bad. If, for example, you have a lawn irrigation system in your yard, the water used for irrigation will sit in underground pipes for days before the system turns on. Contaminants such as fertilizer, lawn care chemicals and even pet waste can be drawn back into the system if backflow occurs. Backflow can transmit this contaminated water back into the municipal piping system or even your home’s piping system. In industrial systems, backflow can also cause cross contamination with the municipal system or even contamination among other fluids used within the industrial process.

How do you prevent it?

Other than avoiding sudden water pressure drops, which are not always avoidable, backflow is prevented by a backflow preventer or valve. There are a variety of types, depending on the application and risk of backflow contamination. The type of backflow prevention device required is usually dictated by local and state codes. Your local water purveyor usually has a list of approved backflow prevention devices available on their website. A backflow preventer contains check valves that only allow flow in one direction. If a sudden drop in pressure occurs upstream of the backflow preventer, the check valves will close and block the flow of water back "upstream" into the system.

Preventing backflow is a key aspect of proper design of an irrigation or piping system. Contact a professional such as W.P. Law, Inc. to help you prevent potentially contaminated water ending up in your kitchen faucet, or worse.

Trackback Link
http://www.wplawinc.com/BlogRetrieve.aspx?BlogID=8702&PostID=621299&A=Trackback
Trackbacks
Post has no trackbacks.

Find A Location Near You!

MAIN OFFICE - LEXINGTON

303 Riverchase Way
Lexington, SC 29072

Phone 803-461 -0599
Toll-Free 800-476-4515
Fax 803-461 -0598
Contact Us

 

MONDAY - FRIDAY
8:00am - 5:00pm

 

Summer Hours:

Effective March 11, 2017
thru August 26, 2017

SATURDAY
8:00 am - 12:00 pm
Counter Service Only

MONDAY - FRIDAY
5:00 pm - 6:00 pm
Counter Service Only

 

Need Directions?

CHARLESTON

3636 Belvedere Rd.
John's Island, SC 29455

Phone 843-559-3945
Fax 843-559-2740
Contact Us

 

MONDAY - FRIDAY ONLY
8:00 am - 5:00 pm

 

Need Directions?

GREENVILLE

1330 Grove Rd.
Greenville, SC 29605

Phone 864-295-3810
800-660-7569
Fax 864-295-6990
Contact Us

 

MONDAY - FRIDAY
8:00am - 5:00pm

 

Need Directions?

GREER

2400 Highway 101 S.
Greer, SC 29651

Phone 864-879-1045
877-835-0714
Fax 864-879-1 046
Contact Us

 

MONDAY - FRIDAY
8:00am - 5:00pm

 

Effective April 2, 2016
thru August 27, 2016
SATURDAY
8:00 am - 12:00 pm
Counter Service Only

 

Need Directions?