Yokohama Waterworks Commemoration Hall
Yokohama was the first city in Japan in which a modern waterworks system was constructed. The Yokohama Waterworks Commemoration Hall and Waterworks Technology Commemoration Hall displays materials and videos that present how Yokohama's waterworks system was developed. (For more information, see the February 2010 issue of the PR magazine pla-topia.) http://www.city.yokohama.lg.jp/suidou/kyoku/torikumi/suidou-pr/kinenkan/
A water feed system branched out from an underground distribution pipe (water feed pipe) carries tap water to faucets in the house.A ferrule provided with a saddle is attached on top of the pipe.The ferrule directs water through a hole in the distribution pipe and supplies it to the inside of the house through a flexible stainless steel pipe and meter.The distribution pipes are mainly made of steel, but water feed systems with bore diameters of 50 mm or less will often adopt a hard polyvinyl chloride pipe on the downstream side of the meter.Among the steel pipes used, the mainstream is hard polyvinyl chloride-lined steel pipes. These are pipes with an inner coating of a hard polyvinyl chloride resin. They are inexpensive and have excellent impact resistance and workability.
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Types of water meters | |
Plastic parts making up a tangential-flow-impeller water meter |
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Current tangential-flow-impeller type | |
Auxiliary stop cock |
