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A cistern (from Middle English cisterne; from Latin cisterna, from cista 'box'; from Ancient Greek κίστη (kístē) 'basket' [1]) is a waterproof receptacle for holding liquids, usually water. Cisterns are often built to catch and store rainwater. [2] To prevent leakage, the interior of the cistern is often lined with hydraulic plaster. [3]
According to the International Residential Code 2003, an air gap length must meet the requirements of being two times the effective inner diameter of the pipe (2×D) in order to be sufficient. [2] A standard widely use in the United States is: A112.1.2 Air Gaps in Plumbing Systems (For Plumbing Fixtures and Water-Connected Receptors)
Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.
The system is made up of a collection of water reservoirs, pump stations, cisterns, suction connections and fireboats. While the system can use both fresh or salt water, it is preferential to not use salt water, as it commonly causes galvanic corrosion in fire equipment. [2] Blue-topped AWSS fire hydrant in the Mission district of San Francisco.
The California Water Documents collection is currently a work in progress at the Claremont Colleges Digital Library. The Water Resources Collections and Archives is located at the University of California, Riverside and features a comprehensive collection of water-resource related documents.
Additional water pressurizing components such as pumping stations may need to be situated at the outlet of underground or aboveground reservoirs or cisterns (if gravity flow is impractical). A pipe network for distribution of water to consumers (which may be private houses or industrial, commercial, or institution establishments) and other ...
Tankhouse, Sonoma County, California A tankhouse (also spelled tank house or tank-house) is a water tower enclosed by siding.Tankhouses were part of a self-contained domestic water system supplying the house and garden, developed before the advent of electricity and municipal water mains.
Part 2.5-California Residential Code Part 3-California Electrical Code Part 4-California Mechanical Code Part 5-California Plumbing Code Part 6-California Energy Code (this section is commonly known as “Title 24” in the construction trade) [3] Part 7- Reserved Part 8-California Historical Building Code Part 9-California Fire Code