To safeguard public health by protecting your water supply from possible contamination, the District requires installation of backflow prevention devices where plumbing systems are cross-connected to potential contamination or poorer quality water. In the event of a malfunction in consumer pressure equipment and/or a sudden drop in pressure in the District system, these devices prevent water that has already left the District system from being siphoned back in, guarding the system from possible pollution.
Some examples of where protective devices (such as double check valve assemblies) are required are: residences with an additional water supply (such as a well), swimming pools or irrigation systems supplied by a separate water service or without a satisfactory air gap or anti-siphon device on the inlet line, buildings with internal booster pump systems, buildings more than three stories high, premises where there are hazardous materials under pressure or where toxic materials are used (hospitals, mortuaries, etc.) and sewage pumping or treatment plants.
The backflow prevention devices are to be supplied, installed and tested by the customer at their expense. The District arranges for annual tests to make sure the device is operating properly. The customer is billed for the test and is responsible for any necessary repairs. While CCWD has an inspection program to identify situations requiring backflow prevention devices, conditions can change (you might have dug a well on your property, for example) and we need to be made aware if this is the case- for your own safety and the safety of others. If such a situation exists on your property, or you would like more information about the regulations concerning the District's backflow prevention program, please call the District at (209)754-3543
If you have a dual water supply, do not interconnect the systems. Make sure that all plumbing meets code requirements. If your home has a swimming pool, there should be no faucets within 50 feet of the pool, unless the faucets are equipped with anti-siphon devices (Uniform Plumbing Code). Make sure your home's irrigation system (sprinklers, etc.) is equipped with anti-siphon valves. If you have a hobby or activity that requires running water (such as a home darkroom for photography), make sure there is an air gap (a space) between the hose and the water in your sink
Many water, natural gas, electric and telephone lines lie harmlessly underground- until someone accidentally digs into them. To prevent possible injury, interruptions of service or the loss of valuable water or energy, call Underground Service Alert (USA) toll free at (800) 227-2600 two working days before you begin any excavation- planting trees, landscaping, trenching, post holes, etc. Describe where you plan to dig and then CCWD or any other USA sponsors will tell you whether or not there are any facilities in the area and, if so, approximately where they are located. If needed, a representative will visit the location and mark them for you
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