Tips To Choosing A Backflow Preventer!
Unless you’re an expert plumber, the term ‘backflow preventer’ or ‘backflow device’ can be unclear. If you have heard of this term but don’t have a great understanding of it, it is essential you do. A backflow preventer is a device that stops contaminated water entering your clean drinking water. Understanding each backflow preventer is important as there will be certain ones more suitable for your home environment. In this blog we’ll tell you everything you need to know about how to pick the best backflow prevention device.
Anti-siphon valves – Anti-siphon devices are essentially one-way valves designed to stop the flow of potentially contaminated water back into the drinkable (potable) water supply. Anti-siphon valves are the most common type of backflow preventer used on residential irrigation systems, primarily because they are simple and inexpensive. This prevention device should never be installed in a location that will ever be submerged underwater .
Pressure vacuum breaker (PVB) – Another backflow prevention device used in residential properties is a PVB. The purpose of a vacuum breaker is like many other prevention devices – to stop back siphonage from negative pressure in pipes. The benefit of a PVB is that only one needs to be installed. This type of prevention device is connected to the main line of pipes leading to the control valves. A PVB needs to be installed above ground and is often found in a slope location at the highest point in the yard with a main line pipe running up to it from the water source.
It is clear to know when a backflow occurs with PVB’s as water will spill over the cap and leak from the pipe. While this is easy to identify if you need urgent plumbing assistance, it is important this device is situated in a place where water spillage will not damage anything.
Reduced pressure backflow preventer (RP assembly) – An RP assembly protects water supplies from contamination at a cost slightly more expensive than other prevention devices. An RP assembly should be installed in a location that is above ground where it will never be submerged under water.
All backflow preventers need to be installed correctly by a professional plumber or backflow prevention specialist.
Double check valve assemblies – A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. This device is spring loaded and used in low to medium hazard applications.
Atmospheric Vacuum Breakers – An Atmospheric Vacuum Breaker (AVB) is a backflow prevention device used in plumbing to prevent backflow of non-potable liquids into the drinking water system.
It’s extremely important to select a backflow device that provides the type of protection specific to your location and need. It is crucial to remember, not all prevention devices offer the same level of protection. You can avoid the hassle of choosing one yourself by contacting a professional plumber who is qualified in backflow testing, maintenance and device installation. If you need a hand selecting a backflow prevention device in Melbourne, contact the professionals at Melbourne Backflow today for your free quote today!
