A filler pipe mounting structure that suppresses permeation of the fuel constituents and that provides ease of mounting. The filler pipe mounting structure includes a resin fuel tank including a projecting cylindrical neck; a fastening member including an embedded section and a joining section, the embedded section being embedded in the neck along a circumferential direction thereof, the joining section formed on the embedded section and exposed from an inner wall of the neck; a mounting member disposed on an end portion of a filler tube and attached to an inner side of the fastening member, the filler tube being in communication with the fuel tank; and a seal member placed between the inner wall of the neck and the outer wall of the mounting member.

A locking sleeve for connection with a valve box assembly of a central vacuum system includes, a first end adapted to couple to a wall of a valve box assembly, a second end opposite the first end, a central vertical axis between the first end and the second end, a first side adapted to be adjacent to a rear wall of a valve box assembly, a second side opposite the first side, a central horizontal axis between the first side and the second side, a slidable locking mechanism moveable in a sliding manner. The slidable locking mechanism is adapted to secure a vacuum hose assembly to the valve box assembly of the central vacuum system.

A locking sleeve for connection with a valve box assembly of a central vacuum system includes, a first end adapted to couple to a wall of a valve box assembly, a second end opposite the first end, a central vertical axis between the first end and the second end, a first side adapted to be adjacent to a rear wall of a valve box assembly, a second side opposite the first side, a central horizontal axis between the first side and the second side, a slidable locking mechanism moveable in a sliding manner. The slidable locking mechanism is adapted to secure a vacuum hose assembly to the valve box assembly of the central vacuum system.

A connection arrangement device for making a secure connection with at least one tube in a fluid line includes at least one adapter body having a passage bore forming at least one fluid channel with at least one outlet and a receptacle, a mating block formed with at least one longitudinal channel receiving the at least one adapter body, and the at least one adapter body includes a retention feature formed in the receptacle and coupled to the mating block such that the at least one adapter body is securely retained in the mating block. In particular, the retention feature of the adapter body is formed with an annular lip at an end portion of the receptacle to be coupled with the mating block.

A valve box assembly of a central vacuum system includes a locking assembly. At least one component of the locking assembly is moveable in a rotational manner or action. Prior to moving the locking assembly to a second locked position, the vacuum hose is moved into the valve box assembly to alter a length of the vacuum hose that extends from the valve box assembly. The length of the vacuum hose that extends from the valve box assembly in the second locked position is shorter than the length of the vacuum hose that extends from the valve box in a first locked position.

A pipe connector connects first and second pipes slidably engageable with each other, the pipe connector including: a side wall extending between a first end and a second end along a longitudinal axis and defining an interior space, the side wall being adapted to be inserted into a floor hole made in a floor; a floor flange extending laterally and outwardly from the first end of the side wall, the floor flange being adapted to rest on a floor surface when the side wall is inserted into the floor hole; and a guiding assembly secured to the side wall and including at least one resilient retaining finger for receiving the first pipe therebetween, the at least one resilient retaining finger being securable to the first pipe when the second pipe is engaged into the first pipe.

An outlet box assembly includes a base and a connection assembly. The base defines a base through-hole. The connection assembly is configured to attach to the base through the base through-hole and includes a connector and an adapter. The connector includes a connector body. The connector body includes an inner surface that defines a passage with one or more internal threads positioned along the inner surface. The adapter includes one or more external threads configured to engage with the one or internal threads of the connector body. The adapter defines a longitudinally-extending adapter through-hole configured to receive one of a fitting or a tubing. The adapter further defines at least one longitudinal slot configured to allow the adapter to radially compress when the adapter is attached to the connector.

An outlet box assembly includes a base and a connection assembly. The base defines a base through-hole. The connection assembly is configured to attach to the base through the base through-hole and includes a connector and an adapter. The connector includes a connector body. The connector body includes an inner surface that defines a passage with one or more internal threads positioned along the inner surface. The adapter includes one or more external threads configured to engage with the one or internal threads of the connector body. The adapter defines a longitudinally-extending adapter through-hole configured to receive one of a fitting or a tubing. The adapter further defines at least one longitudinal slot configured to allow the adapter to radially compress when the adapter is attached to the connector.