Abstract: A secondarily contained underground piping system which interconnects at least one underground storage tank dispensing pump to at least one above-ground dispensing unit. The system includes an originating chamber surrounding the dispensing pump and having at least one opening therein for pipe access thereto. A terminating chamber is positioned directly under the above-ground dispensing unit and includes at least one opening therein for pipe access thereto. A transfer pipe is operably connected from the dispensing pump to the above-ground dispensing unit, and passes through the openings in the originating chamber and the opening in the terminating chamber. Seals are provided for sealing the passage of the transfer pipe through the openings. The transfer pipe includes an inner primary supply pipe for transferring fuel and an outer secondary containment pipe for defining an interstitial space between the primary pipe and the containment pipe.

Abstract: A vapor recovery system for use with fuel dispensing nozzles. The system includes a fuel dispensing nozzle and a vapor piping line operably connected to the nozzle for insertion into a tank for receiving fuel. The line has a small diameter with respect to the diameter of the fuel dispensing hose supplying fuel to the nozzle. A sump is connected to the other end of the line and has a source of vacuum for positively assisting flow of vapor through the line. The sump includes a filter for separating fuel from the vapor to produce vapor clean air. It also has both a vent for venting the vapor clean air and a drain for removing the separated fuel. The system preferably further includes a vacuum regulator means for regulating the vacuum in the vapor piping line by controlling the vacuum at about 1 to about 5 inches of mercury in the line.

Abstract: A sump-riser performing as a collection sump, as a riser for the corresponding tank and as a means for secondary containment for the tank's submersible pump, manway, and fittings. The sump-riser comprises a generally cylindrical sump base with an upright annular lip extending upwardly from an upper support surface; an extension riser including a lower annular riser lip which fits over and round the lip of the sump base; a cover for the extension riser; and an access or observation lid. The riser extension is detachable or removable from the sump base and may be inverted and inserted into the sump base for compact shipping. Score lines may be provided on the riser extension to serve as cutting guides for proper sizing and the sump base may be multi-sided to provide flat walls for accurate hole drilling for pipe and conduit entry.

Abstract: A device for providing access to the interstitial region between an inner pipe and an outer pipe which coaxially define the region. The inner pipe has at least one terminal end extending from the outer pipe to leave a portion of the outer wall of the inner pipe exposed to thereby expose the interstitial region. A boot is provided for defining a chamber with a larger end snugly fitting the outer pipe and a small end snugly fitting on the exposed outer wall of the inner pipe. The boot has an access port communicating with the interior of the chamber to provide access to the interstitial region.

Abstract: A system for neutralizing petroleum products leaked into an enclosed portion of a fuel transfer system such as a sump. The system comprises the use of a water insoluble container having a quantity of a petroleum product mitigation agent enclosed therein. A water insoluble barrier for releasing the quantity of mitigation agent upon contact with a petroleum product permits the mitigation agent to neutralize the petroleum product as soon as it is present and in contact with the barrier. The container may be formed from polystyrene and positioned in the sump to permit the release to the petroleum products regardless of the amount of water present in the sump. In one embodiment, the tube is vertically aligned and extends from the bottom to the top of the sump. Alternatively, the container comprises a petroleum product soluble packet and includes flotation aid for maintaining the packet floating on top of any water in the sump.

Abstract: A pipeline system is provided for a pumping system for fluid products, such as gasoline, diesel fuel and chemicals, and including a pump for pumping such products from a storage tank through through the primary pipeline of the pipeline system to a product dispenser. The pipeline system includes a secondary containment system for the primary pipeline between the tank and dispenser which includes telescoping pipe sections of different diameters. The telescoping piping is installed around the primary pipeline and the pipe sections are, prior to final installation, movable between intermediate and final positions, for enabling completion, testing and inspection of the primary pipeline prior to final completion of the secondary containment system. One section of the telescoping piping is a flexible corrugated pipe which is able to bend around elbows. Compression seals and ring clamps are used to connect the components together.

Abstract: An environmentally safe underground piping system for liquid fuels and chemicals which interconnects an underground liquid storage tank to one or more above ground liquid dispensing units, that provides a complete secondary containment system for the entire primary liquid supply piping system. The piping systems employs one tank access chamber interconnected to one or more dispenser access chambers by a double walled pipe. The double wall pipe provides an interstitial space for gravity flow of any leaking liquids, from any point in the primary liquid supply piping system, to an access chamber, which also serves as a liquid collection sump, for purposes of leak detection.

Abstract: A cover for a sump assembly including a riser section of generally tubular configuration comprising a top section and a skirt section depending from the outer periphery of the top section. The skirt section being of a configuration defining a pair of side by side circumferentially extending inner and outer channels which open in opposite axial directions. One of the channels is engageable over a seal mounted on the outer axial end of the riser. A compression ring is engageable in the other channel to produce radially directed sealing forces between the cover and the riser section.

Abstract: An environmentally safe underground piping system which employes a inner flexible fluid supply piping system contained within an outer non-flexible containment piping system which interconnects a series of surface access chambers. Both the flexible supply and and non-flexible containment piping systems are interconnected by a series of directional fittings and couplings. The containment system may be installed, integrity tested, inspected and backfilled, prior to installation of the supply piping system which allows for a faster and more economical installation.

Abstract: A pipeline system is provided for a pumping system for fluid products, such as gasoline, diesel fuel and chemicals, and including a pump for pumping such products from a storage tank through the primary pipeline of the pipeline system to a product dispenser. The pipeline system includes a secondary containment system for the primary pipeline between the tank and dispenser which includes telescoping pipe sections of different diameters. The telescoping piping is installed around the primary pipeline and the pipe sections are, prior to final installation, movable between intermediate and final positions, for enabling completion, testing and inspection of the primary pipeline prior to final completion of the secondary containment system. One section of the telescoping piping is a flexible corrugated pipe which is able to bend around elbows. Compression seals and ring clamps are used to connect the components together.

Abstract: A sump riser apparatus for a pipeline system includes a hollow sump base including a upstanding annular portion disposed on an upward surface thereof in surrounding relation to an opening formed in that surface. A hollow detachable riser extension is mounted on the sump base and is of a size and shape, relative to the sump base, such that, when the riser extension is inverted, the riser extension can be received within the sump base for storage therein during transportation of the parts. The riser extension includes a cover and an annular step portion at the base thereof which fits over and around the upstanding annular portion of the sump base. The step portion is of a size and shape relative to the cover so as to enable receipt of the cover therein when the riser extension is inverted.

Abstract: A secondarily contained piping system has two spaced access chambers interconnected by a secondary containment pipe to provide a sealed housing for a flexible fluid supply pipe, the ends of which are disposed within the access chamber and have a connector element at each end forming a section adaptable to be interconnected to other fluid conduits, the diameter and bending radius of the fluid supply pipe and the size of the access chamber permitting the fluid pipe after uncoupling to readily be removed from the secondary containment pipe through one of the access chambers.

Abstract: A double wall pipeline is provided for a pumping system for fluid products, such as gasoline, diesel fuel and chemicals, and including a pump for pumping such products from a storage tank through the pipeline to a product dispenser. The double wall pipeline comprises a double wall, an inner primary pipe, an outer secondary pipe spaced from and surrounding the primary pipe, and integral spokes or spacers for supporting the secondary pipe in spaced relation to the primary pipe so as to create an annular space therebetween. The ends of some of the secondary pipe sections are stripped or cut back so as to terminate short of the corresponding end of the primary pipe and thereby permit testing and inspection of the primary pipe prior to completion of a secondary piping system in which the secondary pipe is incorporated.

Abstract: A pipeline system is provided for a pumping system for fluid products, such as gasoline, diesel fuel and chemicals, and including a pump for pumping such products from a storage tank through through the primary pipeline of the pipeline system to a product dispenser. The pipeline system includes a secondary containment system for the primary pipeline between the tank and dispenser which includes telescoping pipe sections of different diameters. The telescoping piping is installed around the primary pipeline and the pipe sections are, prior to final installation, movable between intermediate and final positions, for enabling completion, testing and inspection of the primary pipeline prior to final completion of the secondary containment system. A fusion welding wire bond is provided between overlapping portions of the telescoping pipe sections for bonding these sections in the final positions thereof. An air test clamp assembly enables air pressure testing of the secondary containment system.

Abstract: A multi-purpose fitting system includes a container having an inner tank and an outer tank made of a plastic material. An aperture is provided at the top of the container in which a multi-purpose fitting is provided. The fitting includes a close-off fitting base having a flange which is permanently attached to an outer surface of the inner tank. A close-off skirt made of a plastics material rest on the flange and extends beyond the flange to additionally rest on the outer tank. This skirt is securely attached to an outer surface of the outer tank such as by a continuous weld which provides a seal between the skirt and outer tank. A close-off ring is threadably received on a threaded upper portion of the close-off fitting base to press the skirt against the flange. A fitting member is threadably received in an interior threaded aperture of the close-off fitting base as appropriate.