A water pipe has: a water chamber; a bowl or bowl connector; a hollow neck forming a mouthpiece; and a lid that seals both the mouthpiece and the bowl or bowl connector when the lid is in a closed position. A method of operating a water pipe includes assembling the lid in the closed position on the water pipe. A method of operating a water pipe includes, while the lid is out of the close position: combusting or vaporizing a smokable substance in the bowl to create smoke vapor; and drawing the smoke vapor through the water chamber and out the mouthpiece.

A water pipe has: a water chamber; a bowl or bowl connector; a hollow neck forming a mouthpiece; and a lid that seals both the mouthpiece and the bowl or bowl connector when the lid is in a closed position. A method of operating a water pipe includes assembling the lid in the closed position on the water pipe. A method of operating a water pipe includes, while the lid is out of the close position: combusting or vaporizing a smokable substance in the bowl to create smoke vapor; and drawing the smoke vapor through the water chamber and out the mouthpiece.

A closure is provided for a pressure vessel or pipelines that can provide quick and easy access to the interior of a pressure vessel or pipeline, and means for a pressure tight seal between the hub and door. The closure can incorporate means for mechanically fastening the door to the hub using an external split clamp ring actuated by a toggle mechanism. A locking mechanism can be provided to safeguard against unintended closure actuation, and provides a layer of redundancy to the holding characteristics of the toggle mechanism. The locking mechanism can be interlocked to a pressure alert system to ensure any differential pressure condition contained within the closure is detected prior to disengaging the locking mechanism and actuating the toggle mechanism.

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.

An assembly creates annular voids in concrete around the distal end of cylindrical tubes. A cap has a flat top and a cylindrical, depending skirt. An annular, foam plug extends between the inside of the skirt and the outer diameter of the tube. The plug has an undeformed inner diameter smaller than an outer diameter of the tube to create an interference fit around the tube and keep concrete out when the cap is on the end of the tube. The plug has a radial thickness of 0.3 to 1 inch, and has an axial length of 1 to 3 inches, with a bottom of the plug located at a bottom of the skirt. The cap is glued to the end of the tube for pressure testing. After the tube is entrained in concrete, the cap and plug are removed to leave a void in the concrete surface.

An assembly creates annular voids in concrete around the distal end of cylindrical tubes. A cap has a flat top and a cylindrical, depending skirt. An annular, foam plug extends between the inside of the skirt and the outer diameter of the tube. The plug has an undeformed inner diameter smaller than an outer diameter of the tube to create an interference fit around the tube and keep concrete out when the cap is on the end of the tube. The plug has a radial thickness of 0.3 to 1 inch, and has an axial length of 1 to 3 inches, with a bottom of the plug located at a bottom of the skirt. The cap is glued to the end of the tube for pressure testing. After the tube is entrained in concrete, the cap and plug are removed to leave a void in the concrete surface.

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.

A connector includes a connecting body with a fluid passage at least part way therethrough, and a seal is provided with an outer portion of a fluid tube. A cartridge proximate to the connecting body has a hollow portion therethrough. A grab part has at least one tooth to retain the fluid tube and is between the cartridge and the seal. A demount part within the hollow portion moves the teeth to allow release of the fluid tube. A latch is located on one of the connecting body or a sleeve covering at least part of the cartridge or the connecting body. A mating catch is located on the other of the sleeve or the connecting body, and engagement of the latch with the catch connects the sleeve to the connecting body and helps restrain cartridge movement.

Devices and methods to impart liquid into a pumping unit are described herein. Specifically, a vertical liquid intake is described which allows for diversion of liquid flow from horizontal to vertical without a loss of capacity or increased risk of cavitation. The liquid intake generally includes a body with separate channels and a removable cover.