Drainage Problems
The two terms most frequently heard when there’s a water backup in the kitchen are backflow and back again siphonage. Backflow results when dirty water (or other unsafe materials) flows to the drinking water supply. Back again siphonage occurs when negative pressure builds up and sucks contaminated drinking water into the freshwater supply.
Either way, you’re in trouble. Avoiding backflow is not complicated if you’ve hired an experienced plumber who will plumb your system to include a space (never less than one inch) between every pipe and its drain, which prevents contaminated water from flowing back again to the water supply. This space is frequently referred to as an indirect waste. Floor drains that receive condensate from refrigerators are also required to have an indirect waste.
An atmospheric vacuum breaker is another smart addition to your drinking water line, particularly on any hoses you use in the kitchen to clean the floor or flush out drains. The vacuum breaker is a small shutoff valve that allows the water to drain totally right after the faucet is turned off and minimizes the chances that fresh drinking water could be contaminated by whatever the hose has touched.
Back again siphonage is the term for reversing the normal flow of your drinking water system simply because of a vacuum (or partial vacuum) within the pipes. This sometimes happens right after firefighters use a hydrant in your area or the water system has been shut off temporarily for repairs. Like sipping a soft drink through a straw, when drinking water comes back on right after being shut off, it may produce pressure to move it in the opposite direction than is desired.
The vacuum breaker is, again, the most well-liked preventive measure. Restaurants in areas with winter temperature extremes must also deal with frozen pipes, which produce their own set of challenges for your staff. Heed the advice from the Restaurant and Hospitality Association of Indiana within the “Building and Grounds” section.
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