The official site of the City of West Jordan, Utah 8000 S. Redwood Rd., West Jordan, Utah 84088 - (801) 569-5000  
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  Water Cross Connection
  Consumer Awareness  Cross Connection Protection

Your Hose May Be Hazardous to Your Health!!!
Safe drinking water is so commonly available in this nation that we normally assume any water from a hose or faucet is safe to drink. The City of West Jordan water department is working to maintain that assumption for its customers by eliminating any potential threat to its clean water supply. When water flows backward through the water supply system, its called back-siphonage or backflow. When that water is accidentally mixed with hazardous chemicals or bacteria, it is called dangerous! The danger comes when the hose any hose is connected to a harmful substance. If the pressure in a water main drops while your hose is submerged in polluted or contaminated water, then the water (and whatever is in it) could be sucked back into your pipes and right into your drinking water! Water pressure drops are not uncommon, they can happen when a firefighter battles a fire, before City crews can repair a broken water line, or pressure could drop simply from high water demand such as occurs at summertime.

Some harmful substances you should be wary of are chemicals used to fertilize your grass, or weed killers used on your lawn. The cleanser used on your kitchen sink could be hazardous if swallowed, as could bacteria in the water from your wading pool or waterbed. 
Fortunately, keeping your water safe from these contaminants is easy and inexpensive.
Never submerge hoses in buckets or pools.
Always keep the end of the hose clear of possible contaminants.
Do not use spray attachments without a backflow prevention device. The chemicals used on your
lawn are toxic and can be fatal if ingested..
Do buy and install inexpensive backflow prevention devices for all threaded faucets around your home.
They are available at most hardware stores and home improvement centers.

Restroom Backflow Protection
When water leaves the drinking water supply system and flows into your toilet tank, the water should be prevented from being drawn back into the water supply!

The water in the toilet tank is often treated with cleansing chemicals that are not safe to drink. There is something you can do. Make sure an anti-siphon ball cock assembly is in your toilet tank. This will protect against back siphonage. You must equip your toilet with a thermal expansion relief device to prevent damage to the toilet plumbing. 

The sink and bathroom faucets are generally protected by air-gaps. The only thing that can cause a problem is if someone puts a hand held sprayer on the faucet and it is submerged in bath water. In this case, you will need to install a special hose vacuum breaker. There is nothing that needs to be added to increase the safety of your standard bathtub.

Thermal Expansion Protection:
Thermal expansion occurs whenever water is heated. The backflow preventer prevents the expanded water produced by a water heater from returning to the community supply. Since water cannot be compressed, the expanded water volume can cause a rapid increase of pressure in the piping. Often the pressure will exceed the setting of the Temperature and Safety relief valve (T&P relief valve) located on the water heater. This will result in a loss of hot water at the relief valve.

Never plug a dripping safety relief valve! This is important because a water heater can explode if excessive temperature and pressure build up. Water heaters must have a working temperature and pressure relief valve. it is your responsibility to check the system every three years, to make sure the safety valve is in good working order.

The system can be protected by using a potable water expansion tank which absorbs the thermal expansion and maintains a balanced system pressure.
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