Backflow protector12/8/2023 This can result from different situations, such as repairs to potable water piping, water main breaks, or open fire hydrants. The negative pressure causes a siphon, similar to drinking from a straw, which allows the flow to reverse to the lower pressure. Back-siphonageīack-siphonage occurs when there’s negative pressure in the consumer’s potable water system or the public water supply. This could be caused by a pump installed on the sprinkler system. Backpressureīackpressure occurs when downstream pressure exceeds the upstream supply pressure in the drinking or public water system due to a high-pressure source. There are two types of backflow: backpressure and back-siphonage. What is Backflow? Backflowīackflow is the flow of water through a cross connection from a possible source of contamination back into the drinking water system. The BPA is usually installed at a cross connection, which is the piping between the potable water line and the irrigation system (a cross connection is any physical connection between a possible source of contamination and any piping to a drinking water system). The City of Austin and other Texas municipalities strictly regulate the installation, maintenance and testing of these devices to maintain the safety of the drinking water.Ī backflow prevention assembly (BPA) prevents the potable (drinking) water in the public water supply from becoming contaminated if there’s a backflow of non-potable water from your sprinkler system. When you install an irrigation system, it’s vital that you also connect it to a backflow prevention assembly.
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