What is a Backflow Valve? What does a Backflow Prevention Valve do? What does a Backflow Valve look like? Who can test my Backflow Valve?
These are very common questions most of my customers ask. They have never heard about these valves which help protect our most valuable resource WATER. If you have sub surface irrigation at your house chances are you have a Backflow Valve installed and if you operate a commercial or industrial business that uses chemicals or contaminated wastes the likely hood is that you will have at least one if not more of these Backflow preventing devices installed.
These valves require yearly testing by a licensed plumber who has Backflow accreditation to ensure they are operating correctly. The test form must then be filled out each time and submitted back to the OTR (office of technical regulator) in South Australia. Below is a picture of a Backflow Valve and a copy of the current test report I fill out each time I perform a test on these devices.
Backflow Valves come in all different sizes and shapes depending of the hazard rating they are required to protect. There are 3 different hazard ratings:
An example of Backflow occurring
There can be many instances of a cross-connection hazard. To explain the risk which is involved, imagine that one end of your garden hose is attached to your water system and the other end is placed down into a bucket of liquid fertiliser. At the same time a sudden loss of water occurs in the main water pipes serving your home (such as a water main break or large volumes of water released from a fire hydrant, which is very common in Adelaide these days as our pipes are getting old). The pressure drop causes a reverse flow in the water line and in a system with no Backflow prevention liquid fertiliser from the bucket is sucked into your properties drinking water and potentially into the main water line servicing your local suburbs.
However, if the outlet your garden hose is connected to is equipped with a Backflow prevention device, the reverse flow would cause the check valve inside the Backflow device to engage and stop the Backflow at the hose connection point which will stop contamination of the drinking water pipes.
For more information on Backflow please have a look at this video which I have created to give you a complete understanding of exactly what Backflow is all about and the devices which are used to protect our vital drinking water.
Keep your water safe and clean from un wanted contaminants call Aaron today at Mayfair Plumbing and Gasfitting with all your Backflow needs and questions in South Australia.
CALL NOW: 0429 361 819
Aaron Stewart owns and works in the business of Mayfair Plumbing & Gas Fitting from there offices now based in Adelaide, South Australia. Aaron and his team of licensed plumbers and design consultants are passionate about there work. In this blog they will bring you plumbing and gas tips gathered from around the globe over 20 plus years of experiences in the many different fields of plumbing. If you are looking for a plumbing firm who can do everything from design, construct, project management and scheduled on site maintenance contact the Mayfair Plumbing Group.