A coupling system for plumbing applications including stub-ups in a poured slab. The coupling system includes a coupler and a cap. The coupler provides a glue-hub that is couplable to a stub-up. An opposite end of the coupler is enclosed by a knock-out disc that seals the end of the stub-up for pressure testing. A second glue-hub is provided beneath the knock-out disc. The cap includes a cap plate enclosing a top end thereof and is height adjustable on the coupler. A thermal expansion gap between the slab and the stub-up is provided by a sleeve positionable around the cap. The cap plate and the knock-out disc are “knocked out” to enable connection with the plumbing system and are sized to resist falling into the stub-up. An air purging valve may be installed in the coupler for pressure testing prior to removing the knock-out discs in the cap and coupler.

Example aspects of a nozzle cap adapter, a nozzle cap assembly, and a method for method for mounting a nozzle cap to a fire hydrant nozzle are disclosed. The nozzle cap adapter can comprise an adapter ring defining a first adapter ring end, a second adapter ring end opposite the first adapter ring end, and an interior void extending from the first adapter ring end to the second adapter ring end; a nozzle connector extending from the second end of the adapter ring, the nozzle connector configured to rotatably engage a fire hydrant nozzle; and a latch coupled to the adapter ring and configured to removably lock the nozzle cap adapter onto the fire hydrant nozzle.

A multiport pump and adapter kit for use with a water circulation system for a body of water includes a centrifugal pump assembly having a plurality of outlet ports oriented in different directions and at least one adapter having a first open end configured and dimensioned to be removably connectable to one of said outlet ports, a second open end configured and dimensioned to be removably connectable to a water circulation system, and a hollow body connecting the first open end and the second open end.

Disclosed herein is a sewer cleanout cap that facilitates highly accurate and quick location of a buried or concealed cleanout cap using an electronic locator device. The cleanout cap comprises a circular cap body further comprising a proximal face and a distal face. A circular external radial wall extends between the proximal face and distal face with threads thereon. Extending from the proximal face is a drive block defined laterally by a series of lateral drive flats. The drive block terminates at a proximal drive block face. A first magnet is secured along a central axis on the sewer cleanout cap. In some embodiments the first magnet is secured within a recess within the cap body or drive block. In other embodiments, the first magnet is fixed to the proximal drive block face, a first recess face, or the distal face.

An improved closure assembly for a pressure vessel or pipeline is described, where the closure assembly includes a davit assembly pivotally connecting a closure door to a closure hub where the closure door threadably attaches to the closure hub. The closure door is also threadably attached to the davit assembly where the threaded attachment between with the davit assembly is synchronized or timed with the threaded attachment between the closure door and the closure hub.

A multiport pump and adapter kit for use with a water circulation system for a body of water includes a centrifugal pump assembly having a plurality of outlet ports oriented in different directions and at least one adapter having a first open end configured and dimensioned to be removably connectable to one of said outlet ports, a second open end configured and dimensioned to be removably connectable to a water circulation system, and a hollow body connecting the first open end and the second open end.

A nozzle cap adapter includes an adapter ring defining a first adapter ring end, a second adapter ring end opposite the first adapter ring end, and an interior void extending from the first adapter ring end to the second adapter ring end; a nozzle connector extending from the second adapter ring end of the adapter ring, the nozzle connector configured to rotatably engage a fire hydrant nozzle; and a latch coupled to the adapter ring and configured to removably lock the nozzle cap adapter onto the fire hydrant nozzle; a gasket housing extending into the interior void and defining a gasket groove, the gasket groove facing the second adapter ring end; and a gasket disposed within the gasket groove and configured to abut an end of the fire hydrant nozzle.

A connector convenient for disassembling a water pipe includes a connecting joint and a connecting water pipe. The top end of the connecting joint is communicated with a first threaded cylinder, and the bottom of the connecting joint is fixedly connected to an annular fixing plate. The bottom of the annular fixing plate is fixedly connected to a fixing cylinder, and the surface of the fixing cylinder is fixedly connected to a fixing block. The inner wall of the connecting water pipe is provided with an L-shaped groove. In the installation of the connecting water pipe by setting the L-shaped groove, the annular clamping plate, the internal thread, the external thread and the movable cylinder, the fixing block is movably connected to the interior of the L-shaped groove, and then the fixing block is clamped inside the groove by rotating the connecting joint.

Example aspects of a nozzle cap for a fire hydrant and a method for manufacturing a nozzle cap to detect leaks in a fluid system are disclosed. The nozzle cap for a fire hydrant can comprise a cap body, the cap body comprising an inner housing and an outer housing, the outer housing defining a cavity; a vibration sensor received within the cavity and configured to detect leaks in a fluid system connected to the fire hydrant; and a metal insert contacting the vibration sensor and the inner housing.

Example aspects of a nozzle cap for a fire hydrant and a method of detecting a leak in a fluid system are disclosed. The nozzle cap for a fire hydrant can include an outer housing defining a first end, a second end opposite the first end, and a substantially circumferential wall extending from the first end to the second end; an antenna coupled to the substantially circumferential wall of the outer housing; a cap cover coupled to the outer housing at the first end; and an inner housing coupled to the outer housing at the second end.