| description:
|
This data is categorized and symbolized based on the type of feature.A feature identified as a blowoff is typically a small diameter (<= 50mm) capped pipe controlled by a curb stop style ball valve. It is used for watermain flushing.A feature identified as a swab launch, is typically a capped pipe with a large enough diameter to allow foam swabs to be inserted and retrieved from the distribution system for cleaning purposes.A Swab/BO allows for a threaded pipe to be attached to the swab launch so that it may be used for flushing purposes. The swab/bo may therefore be used for both swabbing and flushing watermain.A yard hydrant allows for year round frost-free access to distribution water. These features are often located at/near the sanitary lift stations for operational purposes, or in some cases may be used as small blowoffs, since they are self draining. |