The BACKFLOW PREVENTION TECHZONE is a regularly
updated compendium of backflow prevention / drinking water
related resource materials & information links collected from
around the world. Recent to archived news stories' excerpts, and web
site reviews are this collection's focus, for anyone involved or
interested in the safety of potable water distribution systems, and backflow
prevention or cross connection control programs. Backflow
prevention or cross-connection
control education and training, for waterworks personnel,
public health and municipal officials, architects, engineers, contractors,
plumbers, backflow preventer testers, and students of all ages, are the
central point of a series of references and links to basic
through advanced technical information about the appropriate use and
correct installation of drinking water system backflow preventer
devices. Why they are essential to drinking water plumbing safety and
our health will be explored extensively. Historical to current
web page links, information, ideas, and techniques from around the world,
related to backflow prevention and cross connection control between potable
water plumbing, and drainage or non-potable systems, as well as other safe
drinking water supply issues encompass the aim of the Backflow
Prevention TechZone......
Top 10
Backflow News Stories of 2005
Protecting drinking water
supplies within buildings "Mention drinking water contamination
and most people would suspect problems with the ground water or with a water
treatment plant. However, contamination of a building's internal piping or
associated household appliances, whether by terrorist act or through an
unintentional mishap, also could pose a serious threat to the health of
building occupants. Recently, the National Institute of Standards and Technology
(NIST) and the Environmental Protection Agency's National Homeland Security
Research Center (NHSRC) joined forces to cut the risk of this little explored
hazard. Under an interagency agreement, researchers from the two
organizations have launched an investigation of contamination possibilities
affecting internal water lines..." Medical News Today, Feb. 26,
2005
Tainted water on tap "HUNDREDS of western Sydney residents have become ill after
unknowingly drinking unhygienic recycled water, that was pumped though
their household taps. The Daily Telegraph has learned that several
residents of Glenwood and Kellyville have fallen ill after
drinking the recycled water. Recycled water was mistakenly pumped
through drinking water pipes. ...The dual-pipe recycled water
scheme was designed for new estates in the Rouse Hill area in the early
1990s. ...Documents obtained under Freedom of Information show there have
been at least four incidents of cross-connection since 2001. In the
most recent incident – in August – 82 homes in four streets in Glenwood
were cross-connected, allegedly after a plumbing mistake in a house under
construction. ...it was believed a plumber had accidentally crossed the pipes
while he connected them. Sydney Water offered the affected
residents a rebate." The Daily Telegraph, Jan. 12, 2005 (full article may be off-line)
LEGISLATION
- PUSHING THE BOUNDARIES "Drinking liquid manure with your cup of tea, finding blood from the local
abbatoir in the tap water or discovering glowing, growing green aglae fillling
your sink may sound like the plot of a Hollywood movie, but it's not. These are
just some of the real incidents that have occurred in Australia and New Zealand
because proper backflow prevention measures were not in place. Backflow
prevention is not a new issue. It was developed in the late 1800s after large
companies realised that one of the major reasons for employee illness, and
consequently loss of production, was contaminated drinking water. Yet some two
hundred years later, many water utilities still struggle to convince
people of the potential dangers associated with backflow and cross connections.
...Recognising the importance of both protecting mains water quality and the
health and safety of their communities, most water utilities in New Zealand and
Australia require their commercial and industrial customers to install and
maintain backflow prevention devices at the water meter to ensure that
contaminated water does not find its way into the mains. This commitment
to backflow prevention is not a worldwide trend. With the exception of the
United States, Canada, Australia and, of course, New Zealand, the issues of
cross contamination and backflow prevention are primarily seen as the
accountability of the individual business with the governing bodies, both at a
local and national level, taking little or no responsibility. This is
illustrated by the French and British models. In France there is a mixture of
private and public ownership, with the latter assuming a minimal amount of
responsibility. In the United Kingdom there are limited formal standards for the
types of backflow devices used (primarily head and break tanks) and the
competence of the installers." Metrowater, Aug. 29,
2005
Backflow backlash by council,
residents "Some Venice City Council members
aren't too thrilled by the city's new program to protect the public
drinking water supply. "This is bureaucratic bumbling at its worst,"
council member Rick Tacy said. "The way it's being executed is like it's a
government program. There's got to be a more user-friendly way to implement
this." Council comments came after several residents spoke about a
requirement that all public water customers install a backflow-prevention
device in their water lines and pay for annual certifications. ...Resident
concerns are with cost and location of these devices, with the city
saying all 12,000 water customers must have them by 2010. Installation and
purchase can be as much as $500 or more, according to some plumbers, and
annual testing can be as much as $50. ..."It honestly sounds to me like the
tail wagging the puppy," resident Chad Vaughn said. "In this case, it's the
utilities department wagging the 12,000 customers. ...City Manager Marty
Black said the county health department, which is regulating local backflow
programs, initially wanted the conversion to be done within a year. The
county backed off once it realized that was impossible, Black said. Venice
is still developing a database to determine which of its 12,000 customers
already have backflow devices, let alone whether they meet current
standards. Right now there are only two city employees handling the
backflow program. "Quite frankly, it's overwhelming our ability to respond
(to utility service calls)," Black said." Venice Gondolier, March 11,
2005
City
begins free inspections for water devices "City employees last week began a new policy
authorized by the board of mayor and aldermen in December of
inspecting backflow-prevention devices on water lines at no cost to
building owners. ...Until the change in the city code in December allowing
city employees to conduct the annual inspections the process
was handled by licensed plumbers in Dyer County with costs
ranging between $45 and $50... ...There are over 600 businesses in the city
that currently have backflow preventers installed. Rice explained that
if a preventer fails inspection the state and city code require that
repairs take place within 30 days. Then, the business owner would have to
pay for a final safety inspection of the device." State-Gazette.com, Jan.
10, 2005
Council
halts water valve installation "The Middletown Borough Council
agreed last night to give discounts on retroactive water bills but decided to
stop installing backflow prevention valves in borough residences until safety
concerns are resolved. The council was expected to vote last night on a $50
rebate for residents who need to upgrade their water heating systems to
counteract possible water pressure problems caused by the valves. After remarks
by Councilman Christopher McNamara and some residents, the council voted
unanimously to stop the valve installation and form a task force to determine
how to deal with the situation. The retroactive bills and water-pressure
concerns were precipitated by the borough's $1.1 million project to install
digital water meters and backflow prevention valves in homes and businesses.
...McNamara said backflow prevention valves can cause an increase in water
pressure when the hot-water tank is heating. He said the borough might have
violated construction codes by installing the valves without installing thermal
expansion tanks to counteract the increase in pressure. Some residents
told the council that their hot water tanks ruptured or that pipes began leaking
after the valves were installed. ..."You're installing a bomb in my
house," said Ned Eppinger, who has not allowed the meter and valve to be
installed. ...it was estimated that only 2 percent of homes would need
thermal expansion tanks, and residents were advised to watch for signs such as a
dripping relief valve on the hot-water tank, creaking noises in plumbing or
water surges. "Nobody did their homework," Bowman said. "Thermal expansion
is everywhere there is hot water. It's not 2 percent; it's 100 percent." The
Patriot-News, May 3, 2005
RMWD
backflow device issue a joke "William “Bill” Bopf is supposed to be on the board of directors
for Rainbow Water. The battle with Rainbow over the “backflow” requirements
is out of hand. Lyons says they are legal, but Rainbow says they are not.
Rainbow says they must be tested, but the board says you don’t even need
one if the pipe is less than one inch. The whole thing is a joke. You
call the people at Rainbow and if they return the call he gives you the
same song and dance he has been spouting for over a year. He says the board
needs to determine the specifics, but in a year they have never dealt with
the issue of need for a residence. In the meantime, we keep paying a
monthly surcharge to have the backflow tested — but it never gets tested."
The Village News, Sept. 15, 2005
Revolution's over, get a Backflow
Preventer "A little of this, a little of that,
or, would you like some cheese with your whine? When Eustis went all out for
George Washington's birthday, it was the best of times. A parade and carnival
rides on the lake struck a perfect note. Let those other towns have their
watered down Presidents Day, a compromise for convenience that shortchanges two
great Americans. We do it right, and I was proud to be here. Until the mail came
Tuesday. How can a place that has its act so together when it comes to George
Washington be so royally clueless in the area of Backflow Preventers? I
have once again been found to be "out of compliance with City Ordinance # 02-57,
Cross Connection, as stated in section 118-20 of this Ordinance." For the
second time in two years, I am overdue to do something without ever having had
the slightest notion that I was due in the first place. Supposedly there was a
previous letter. I didn't get it. That might make for a good
argument at the hearing, if there was going to be one. But there isn't. The city
is willing to take its own word in this matter, and I either do as I was
scolded, or make arrangements to shower next door. I don't even know what this
device is, where it is located at my house or what it does, but apparently
Backflow Preventer checkage is a vital service. It is also a service not
provided by the city. ...While filing this year's letter from Eustis in my
Miscellaneous Threats folder, I found last year's threatening letter from the
St. Johns River Water Management District, which also uses a lot of capital
letters in references to itself. That follows logically. It is sort of a
glorified group of Backflow Technicians who think they're on the Supreme Court.
I also found the letter I wrote back but never mailed when they fined me for
something I'm not sure I did." Orlando Sentinel, March 5,
2005
City
shuts off resident’s water in dispute about
equipment "The
city has shut off the water of a resident who refused to heed its order to
install a device to prevent potential contamination in the public water
system. The action is part of the city’s efforts to locate the source of
bacterial contamination in the system dating back to the spring of 2004.
Officials never were able to locate the source of the contamination. One
possible explanation they offered was a private water supply being tied to the
public system -- known as cross-connections -- without proper backflow
protection. This can occur if residents pump lake water into their
irrigation system, which already is connected to the public system, as a way to
save money watering their yards. Lakewater could flow to the public system if
the resident doesn’t have backflow protection. ...Last December, the city mailed
a survey to lakefront residents asking if they had alternative water supplies.
The response was worrisome. “We were surprised by the amount of people who have
alternative water sources they actually use,” Brooks said. City crews physically
surveyed more than 400 properties that did use lake water to ensure they didn’t
have a cross connections. These connections also can occur from wells or, less
commonly, hydraulic boat lifts using lake water. They located several
actual cross-connections. In April, the city mailed about 100 letters to
lakefront residents who had alternative water supply from a well or for pumping
lake water. The letter stated they must either remove the alternate system or
put in a backflow prevention device. The city would inspect the property to
ensure action was taken. In late October, the city sent 57 letters to residents
saying they hadn’t complied and would have their water shut off by Nov. 30. Nine
still didn’t comply, and the city sent a third letter giving them a drop-dead
deadline of Dec. 14 to come into compliance. They had the option to plead their
case before a building official. Two appeared before the building official and
received an extension to come into compliance. Their cases are pending. Six
others met the city requirement by removing pumps from the lake or installing a
backflow prevention device. One received an extension because they installed the
wrong device. The lone remaining resident had their water shut off Friday." The
Olympian, Dec. 22, 2005
The Toxicity of
Environmentalism "The
environmentalist fear mongers are gearing up for a new propaganda blitz, based
on an alleged connection between the two recent major hurricanes and alleged
global warming. They apparently believe that modern education and cultural
reconditioning have been at work long enough for most Americans by now to have
adopted the mentality of primitive tribal villagers, who can be frightened into
sacrificing their sheep and goats (substitute SUVs and air conditioners) to
avoid the wrath of nature. ...Recently a popular
imported mineral water was removed from the market because tests showed that
samples of it contained thirty-five parts per billion of benzene. Although this
was an amount so small that only fifteen years ago it would have been impossible
even to detect, it was assumed that considerations of public health required
withdrawal of the product. Such a case, of course, is not unusual nowadays. The
presence of parts per billion of a toxic substance is routinely extrapolated
into being regarded as a cause of human deaths. And whenever the number of
projected deaths exceeds one in a million (or less), environmentalists demand
that the government remove the offending pesticide, preservative, or other
alleged bearer of toxic pollution from the market. ...While it is not
necessary to question the good intentions and sincerity of the overwhelming
majority of the members of the environmental or ecology movement, it is vital
that the public realize that in this seemingly lofty and noble movement
itself can be found more than a little evidence of the most profound
toxicity. ...The reason that one after another of the environmentalists'
claims turn out to be proven wrong is that they are made without any regard for
truth in the first place. In making their claims, the environmentalists reach
for whatever is at hand that will serve to frighten people, make them lose
confidence in science and technology, and, ultimately, lead them to deliver
themselves up to the environmentalists' tender mercies. The claims rest on
unsupported conjectures and wild leaps of imagination from scintillas of fact to
arbitrary conclusions, by means of evasion and the drawing of invalid
inferences. It is out and out evasion and invalid inference to leap from
findings about the effects of feeding rats or mice dosages the equivalent of a
hundred or more times what any human being would ever ingest, and then draw
inferences about the effects on people of consuming normal quantities. Fears of
parts per billion of this or that chemical causing single-digit deaths per
million do not rest on science, but on imagination. Such claims have nothing to
do either with actual experimentation or with the concept of causality." Ludwig
von Mises Institute, Oct. 3, 2005
Any comments or
questions about this site,
or inquiries about
available backflow prevention programs or cross connection inspection
& training services
Backflow Prevention
Techzone and
Midwest Backflow
Prevention