Dispenser containment

A sump for inhibiting leakage of liquid contained therein comprising:

• a double wall for at least part of the sump, the sump defining a cavity for containing liquid, the wall being for at least one of the a base or side wall of the sump;
• an interstitial space between the double wall;
• a fluid in the interstitial space;
• a sensor in fluid communication with the fluid in the interstitial space such that a change in the level of the fluid in the interstitial space causes the sensor to indicate leakage into or from the interstitial space;
• and
• the sensor being a manometer, and the manometer being selectively mounted in the cavity within an inner wall of the double walls and wherein the manometer is in fluid communication with the interstitial space.

A sump for inhibiting leakage of liquid contained therein comprising:

• a double wall for at least part of the sump, the sump defining a cavity for containing liquid, the wall being for at least one of the a base or side wall of the sump;
• an interstitial space between the double wall;
• a brine liquid in the interstitial space;
• a sensor in fluid communication with the brine liquid in the interstitial space such that a change in the level of the fluid in the interstitial space causes the sensor to indicate leakage into or from the interstitial space;
• the sensor being a manometer, and the manometer being selectively mounted in the cavity within an inner wall of the double walls and wherein the manometer is in fluid communication with the brine liquid in the interstitial space;
• and
• means for locating a gasoline dispenser above the sump, the sump being for containing liquid leaking from at least one of the dispenser or a pipe directed from a source of gasoline to the gasoline dispenser and the pipe being directed at least partly through the sump in its connection between the source and the dispenser.

A sump for inhibiting leakage of liquid contained therein comprising:

• a double wall for at least part of the sump, the sump defining a cavity for containing liquid, the wall being for at least one of the a base or side wall of the sump;
• an interstitial space between the double wall;
• a fluid in the interstitial space;
• a sensor in fluid communication with the fluid in the interstitial space such that a change in the condition of the fluid in the interstitial space causes the sensor to indicate leakage into or from the interstitial space;
• and
• the sensor means being connected for communicating a change in the fluid condition to an indicator.

A sump for inhibiting leakage of liquid contained therein comprising:

• a double wall for at least part of the sump, the sump defining a cavity for containing liquid, the wall being for at least one of the a base or side wall of the sump;
• an interstitial space between the double wall;
• a fluid in the interstitial space;
• and
• a sensor in the cavity of the sump, such that a change in the condition of the fluid in the interstitial space causes the sensor to indicate leakage into or from the interstitial space.

A sump for inhibiting leakage of liquid contained therein comprising:

• a double wall for at least part of the sump, the sump defining a cavity for containing liquid, the wall being for at least one of the a base or side wall of the sump;
• an interstitial space between the double wall;
• and
• a sensor connected with the interstitial space, such that a change in the condition in the interstitial space causes the sensor to indicate leakage into or from the interstitial space.

A sump for location below a ground level and for cooperation with a tank sump for storing gasoline for subsequent delivery to a gasoline dispenser comprising:

• a base;
• a wall directed upwardly from the base of the sump towards a top thereby forming a cavity;
• the base being for location on a tank sump collar, the collar giving access to tank sump for storing gasoline;
• at least one of the base or the wall of the sump is formed by at least two elements and includes said interstitial space between the two elements, there being a fluid in the interstitial space;
• and
• a sensor, preferably a manometer, in fluid connection with the interstitial space, he sensor being for determining fluid changes in the interstitial space, such changes being an indication of fluid passage through at least one of the elements s being the double wall or base.