The Watts Model LF07S Residential Fire Sprinkler Dual Check Backflow Preventer is designed for non-health hazard [i.e., pollutant] application on potable fire sprinkler service connections to protect against possible backsiphonage conditions that could inadvertently drain the fire sprinkler system. Factory replacement kit. The two types of backflow are known Plumbing codes mandate that potable water supplies be protected against backflow at all cross-connections. Backsiphonage can be created when there is a stoppage of the water supply due to nearby fire-fighting, repairs or breaks in city main, etc. This 2 inch reduced pressure zone assembly backflow preventer helps prevent the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Field-proven protection against microbial-induced corrosion (MIC). Designed for use in non-health hazard cross-connections and continuous pressure applications that are subject to backpressure or backsiphonage incidents. : The reason for it's failure may be if froze. 0000065440 00000 n Looking for help with product questions, support or a quote? the flow of water from its intended direction in To keep the drinking water safe in the future, workers installed a backflow preventer on the HVAC system lines. If a negative pressure develops in the supply line, the loss of pressure permits the check valve to drop sealing the orifice while at the same time the vent opens admitting air to the system to break the vacuum. Series 9BD is designed for continuous pressure applications and complies with FDA food additive regulations. 0000048711 00000 n Plumbing It seem a bit unusual that a 1 year old device would be leaking, but stuff happens. I had turned off shut off valves (cocks) for the winter in Dec last year and I wanted to open the valves for this year. Will an anti-siphon vacuum breaker protect against a backpressure backflow condition? Two containers filled with water were stationed at the villages hall for residents to fill jugs, and the do-not-use water advisory persisted for two full days. Hose bibb vacuum breakers are small inexpensive devices with hose connections which are simply attached to sill cocks and threaded faucets or wherever there is a possibility of a hose being attached which could be introduced to a contaminant. Maximum Working Pressure: 150psi (10.3 bar) Features In-line design minimizes pressure drop across the valve Backpressure is defined as pressure higher Watts Backflow Preventer Leak - Terry Love Plumbing Advice & Remodel water, including fecal matter. Will an anti-siphon vacuum breaker protect against a backpressure backflow condition? The risks to drinking water quality from backflow contamination incidents pose a constant threatwhether they're nuisance, non-health hazards, or serious public health events. 0000034227 00000 n Submerging the garden hose in the chemical mixer without a vacuum breaker on the hose bibb created an indirect cross-connection, causing X-ray developer and fixer chemicals to enter the drinking water.

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