Overflow valve prevention system
First Claim
1. A method for retrofitting an overflow valve assembly in a below-ground transfer pump sump used in the dispensing of liquid fuels comprising:
- providing a sump in communication with a liquid fuel storage tank and a riser assembly extending between the sump and the storage tank, the riser assembly comprising a conduit having a cylindrical side wall;
providing an overflow assembly comprising;
an overflow valve;
an overflow inlet attached to one end of the overflow valve;
an overflow outlet attached to the opposite end of the overflow valve;
a mounting plate having a plate opening in communication with the overflow outlet; and
at least one clamp for attaching the mounting plate to the sidewall of the riser assembly;
generating an opening in the sidewall of the riser assembly;
placing the overflow outlet of the overflow assembly adjacent the opening of the riser assembly;
securing the mounting plate to the riser assembly with the at least one clamp;
permitting water from the ground adjacent the sump to enter the sump and mix with any liquid fuel in the sump; and
if the liquid fuel and water mixture in the sump reaches a predetermined level, allowing the liquid mixture to pass through the overflow assembly, into the conduit and into the storage tank containing the liquid fuel.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of controlling overflow in a below-ground transfer pump sump used in the dispensing of liquid fuels. The method comprises providing a sump having a sump bottom below a level of ground immediately adjacent the sump, providing a storage tank having an internal cavity for the storage of liquid fuel, the storage tank having a conduit in communication with the sump and providing an overflow assembly having an inlet disposed within the sump and an outlet communicating with the conduit. The method includes permitting water from the ground adjacent the sump to enter the sump and mix with any liquid fuel in the sump and if the liquid fuel and water mixture in the sump reaches a predetermined level, allowing the liquid mixture to pass through the overflow assembly, into the conduit and into the storage tank containing the liquid fuel.
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Citations
6 Claims
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1. A method for retrofitting an overflow valve assembly in a below-ground transfer pump sump used in the dispensing of liquid fuels comprising:
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providing a sump in communication with a liquid fuel storage tank and a riser assembly extending between the sump and the storage tank, the riser assembly comprising a conduit having a cylindrical side wall; providing an overflow assembly comprising; an overflow valve; an overflow inlet attached to one end of the overflow valve; an overflow outlet attached to the opposite end of the overflow valve; a mounting plate having a plate opening in communication with the overflow outlet; and at least one clamp for attaching the mounting plate to the sidewall of the riser assembly; generating an opening in the sidewall of the riser assembly; placing the overflow outlet of the overflow assembly adjacent the opening of the riser assembly; securing the mounting plate to the riser assembly with the at least one clamp; permitting water from the ground adjacent the sump to enter the sump and mix with any liquid fuel in the sump; and if the liquid fuel and water mixture in the sump reaches a predetermined level, allowing the liquid mixture to pass through the overflow assembly, into the conduit and into the storage tank containing the liquid fuel. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification