Backflow occurs when there is a reversal of water flow from premises and drawn back into municipal supply lines caused by back siphonage or backpressure in commercial, industrial or residential settings.
Water that comes into your home or industrial facility should only flow in one direction – from the municipal source straight into your premises. A backflow can occur due to changes in pressure resulting from a water main break, for example.
Cross connection and backflow prevention valves are systems designed to prevent the contamination of drinking water. They ensure clean water flow and prevent debris or other contaminants from backing into the water that is supplied to your premises.
Backpressure occurs when the downstream water pressure is greater than the water supply pressure.
Similar to drinking with a straw, back siphonage occurs when there is a negative pressure from a vacuum in the supply pipes. Back siphonage reverses normal flow of the water, and can pull contaminants into potable water supplies.
One of our licenced drainage contractors will investigate if backflow is occurring and why, so that it can be remedied. A backflow testing device is used to detect changes in the pressure or leakage. We will make sure that your backflow prevention valve is working properly.
For industrial/commercial use yearly tests must be conducted and submitted to the municipality. Our certified plumbing contractors can test, and if needed, repair or replace the backflow system in your business or home.
DCA – A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. … Secondly the closure of one valve reduces the pressure differential across the other, allowing a more reliable seal and avoiding even minor leakage.
RP – A Reduced Pressure Zone (RPZ) lets you know that the valve is working properly. RPZ backflow preventers consist of two independent check valves. They work like a double-check backflow preventer, but they also have an intermediate relief valve that opens to atmosphere if both check valves should fail.
HCVB – Hose Connection Vacuum Breaker
AVB – An Atmospheric Vacuum Breaker
DCDA – A Double Check Detector Assembly includes two check valves which ensures that one valve will close even if the other doesn’t.
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We offer service and pumpwork, certified backflow installation and testing, drain services and video drain inspection.
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