Double-containment underground piping system
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United States of America Patent
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Oct 22, 1996
Issued Date -
N/A
app pub date -
Jun 6, 1995
filing date -
Dec 20, 1988
priority date (Note) -
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Abstract
A double piping system connected between an underground storage tank and the above ground liquid dispenser is used to provide containment of the pumped liquids from the underground piping system into the environment. The piping system can be tested or replaced from grade without excavating or breaking ground at the installed tank site. Also, disclosed is a method for detecting such leaks and for the gravity drainage of such leaks into a containment chamber.
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