Abstract: Embodiments of a valve assembly and a plumbing system incorporating the same are provided herein. In some embodiments, a valve assembly for use with an enclosed environment includes a housing having an interior volume, an inlet disposed at a first end of the housing and fluidly coupled to an environment surrounding the housing, and an outlet disposed at a second end of the housing opposite the first end and fluidly coupled to the enclosed environment; a first valve having a first valve seat and a first sealing member at least partially extending through a first opening in the first valve seat in a closed position; and a second valve disposed beneath the first valve and having a second valve seat and a second sealing member at least partially extending through a second opening in the second valve seat in a closed position.

Abstract: Embodiments of a valve assembly and a method of detecting a leak in the same are provided herein. In some embodiments, a valve assembly for use with an enclosed environment includes a housing having an interior volume; a first valve having a first valve seat and a first sealing member at least partially extending through a first opening in the first valve seat in a closed position; a second valve disposed beneath the first valve and having a second valve seat and a second sealing member at least partially extending through a second opening in the second valve seat in a closed position; and a position sensing device coupled to an inner wall of the housing beneath the first valve and configured to detect a position of the first sealing member.

Abstract: An apparatus to allow or stop a flow into a piping system or an enclosed environment comprises (a) a housing having an upper flow passage and a lower flow passage; (b) a valve seat, wherein the valve seat is between the upper flow passage and the lower flow passage, wherein at least one opening is formed on the valve seat; (c) at least one rotary valve inside the housing, wherein each of the at least one rotary valve further comprises a main body and two guides mounted to the main body opposite to each other, and wherein the at least one rotary valve can move inside the upper flow passage and above the valve seat; and (d) at least two guide rails inside the upper flow passage for guiding each of the at least one rotary valve between an open position and a closed position.

Abstract: Embodiments of a valve assembly and a plumbing system incorporating the same are provided herein. In some embodiments, a valve assembly for use with an enclosed environment includes a housing having an interior volume, an inlet disposed at a first end of the housing and fluidly coupled to an environment surrounding the housing, and an outlet disposed at a second end of the housing opposite the first end and fluidly coupled to the enclosed environment; a first valve having a first valve seat and a first sealing member at least partially extending through a first opening in the first valve seat in a closed position; and a second valve disposed beneath the first valve and having a second valve seat and a second sealing member at least partially extending through a second opening in the second valve seat in a closed position.

Abstract: An apparatus to allow or stop a flow into a piping system or an enclosed environment comprises a housing having an upper flow passage, a gasket, and a lower flow passage, wherein said gasket is between said upper flow passage and said lower flow passage, wherein said gasket has an inner diameter less than an inner diameter of said upper flow passage; a rotary valve inside said housing, wherein said rotary valve further comprises a main body and two guides affixed to said main body in opposition to each other, wherein said main body of said rotary valve is configured to be between said inner diameter of said gasket and said inner diameter of said upper flow passage, and wherein said rotary valve can move inside said upper flow passage and above said gasket; and two guide rails inside the upper flow passage.

Abstract: An object holding device comprises at least two gripping lips, at least one supporting wall for each of at least two gripping lips, one base, wherein at least two gripping lips are respectively opposed to one another, wherein the at least two gripping lips form at least one slit between one another, wherein each the at least one supporting wall is attached with one of the at least two gripping lips and extends to the base, at least one crease is formed in the approximately middle of each supporting wall, wherein the crease forms an angle of about 30 degrees to about 90 degrees relatively to the base, wherein the at least two gripping lips, the at least one supporting wall for each of the at least two gripping lips, and the base together define a space to receive the at least one object.

Abstract: An apparatus to allow or stop an air or water passage into an enclosed environment comprises a housing, an air supply outlet, an air intake inlet, a ball, a gasket, an inlet air filter, an outlet air filter, wherein the ball is inside the housing and moves freely inside the housing, wherein the ball can reside on the gasket and temporarily forms seal to stop the air or water passage, and wherein the ball can be lifted by a lifting force to detach with the gasket when the lifting force is created by an pressure difference when ambient pressure above the gasket inside the housing is less than ambient pressure in the air intake inlet and when the lifting force is greater than the weight of the ball, wherein the air or water passage will flow through the housing and the air supply outlet when the ball is lifted.

Abstract: An apparatus to allow or stop an air or water passage into an enclosed environment comprises a housing, an air supply outlet, an air intake inlet, a ball, a gasket, an inlet air filter, an outlet air filter, wherein the ball is inside the housing and moves freely inside the housing, wherein the ball can reside on the gasket and temporarily forms seal to stop the air or water passage, and wherein the ball can be lifted by a lifting force to detach with the gasket when the lifting force is created by an pressure difference when ambient pressure above the gasket inside the housing is less than ambient pressure in the air intake inlet and when the lifting force is greater than the weight of the ball, wherein the air or water passage will flow through the housing and the air supply outlet when the ball is lifted.

Abstract: An apparatus to allow or stop a flow into an enclosed environment or piping system comprises: (a) a housing having an upper flow passage, a middle flow passage, a lower flow passage; (b) a first valve seat, wherein the first valve seat is between the upper flow passage and the middle flow passage, and wherein a first opening is formed on the first valve seat; (c) a first rotary valve inside the housing, moving inside the upper flow passage and above the first valve seat; (d) a second valve seat, wherein the second valve seat is between the middle flow passage and the lower flow passage, wherein a second opening is formed on the second valve seat; and (e) a second rotary valve inside the housing, moving inside the middle flow passage and above the second valve seat.

Abstract: An apparatus to allow or stop a flow into a piping system or an enclosed environment comprises a housing having an upper flow passage, a gasket, and a lower flow passage, wherein said gasket is between said upper flow passage and said lower flow passage, wherein said gasket has an inner diameter less than an inner diameter of said upper flow passage; a rotary valve inside said housing, wherein said rotary valve further comprises a main body and two guides affixed to said main body in opposition to each other, wherein said main body of said rotary valve is configured to be between said inner diameter of said gasket and said inner diameter of said upper flow passage, and wherein said rotary valve can move inside said upper flow passage and above said gasket; and two guide rails inside the upper flow passage.

Abstract: Embodiments of a valve assembly and a method of detecting a leak in the same are provided herein. In some embodiments, a valve assembly for use with an enclosed environment includes a housing having an interior volume; a first valve having a first valve seat and a first sealing member at least partially extending through a first opening in the first valve seat in a closed position; a second valve disposed beneath the first valve and having a second valve seat and a second sealing member at least partially extending through a second opening in the second valve seat in a closed position; and a position sensing device coupled to an inner wall of the housing beneath the first valve and configured to detect a position of the first sealing member.

Abstract: An object-holding apparatus comprising a body having at least one cavity formed on said one surface. The cavity further comprises a pathway extending from the surface into the body. At least one object can be disposed into the pathway of the cavity and be held tightly in the pathway. The object-holding apparatus can be water-tight with a tube filled with a flexible filling material being inserted into the pathway of the cavity of the body of the object-holding apparatus. The object to be held in the pathway can include but not limited to tools such as drill bits, impact driver bits, other oversized or small tool accessories, other tools including but not limited to screwdrivers, pliers, as well as any other item which a user would like to hold securely. A method to make an object-holding apparatus is also presented.

Abstract: An apparatus to allow or stop an air flow into an enclosed environment or piping system comprises (a) a housing having an upper flow passage, a middle flow passage, a lower flow passage; (b) a first valve seat; (c) a first valve diaphragm; (d) a second valve seat; and (e) a second valve diaphragm.

Abstract: An apparatus to allow or stop a flow into a piping system or an enclosed environment comprises (a) a housing having an upper flow passage and a lower flow passage; (b) a valve seat, wherein the valve seat is between the upper flow passage and the lower flow passage, wherein at least one opening is formed on the valve seat; (c) at least one rotary valve inside the housing, wherein each of the at least one rotary valve further comprises a main body and two guides mounted to the main body opposite to each other, and wherein the at least one rotary valve can move inside the upper flow passage and above the valve seat; and (d)at least two guide rails inside the upper flow passage for guiding each of the at least one rotary valve between an open position and a closed position.