Systems, apparatus and methods for providing air and water to hot tub jets. The present teachings include jet assemblies, manifold assemblies, and related components, as well as methods of assembling hot tubs involving these components. In some cases, the present teachings describe the use of dual extrusion tubing to route air and water through adjacent, connected fluid conduits. In some cases, the present teachings describe a press-and-click method of connecting various components.

The present application discloses novel systems for conducting the filtration of blood using manifolds. The manifolds integrate various sensors and have fluid pathways formed therein to direct fluids from various sources through the requisite blood filtration or ultrafiltration system steps.

An adapter for a pool cleaning system is provided. The adapter includes a base member having a top and a bottom surface. The adapter also includes six upper ports coupled to the top surface of the base member, each upper port including an upper aperture extending through the upper port and through the base member. The adapter further includes five lower ports coupled to the bottom surface of the base member, each lower port including a lower aperture extending through the lower port and through the base member. In some embodiments, four of lower ports are in fluid communication four of the upper ports and one of the lower ports is in fluid communication with two of the upper ports.

A gas distribution system, a reactor system including the gas distribution system, and method of using the gas distribution system and reactor system are disclosed. The gas distribution system can be used in gas-phase reactor systems to independently fine tune gas source locations and gas flow rates of reactants to a reaction chamber of the reactor systems.

A safety interlock valve with two flow passages, which in one position allows flow through the flow passages and blocks flow between them, and in another position blocks flow through the flow passages and allows flow between them. The safety interlock valve can be used in hydraulic systems such as power tongs.

A manifold for supplying multiple water streams, which streams may be used in connection with fire protection systems, from a single water supply source. The system includes an elongate body portion for holding water. Body portion has spaced apart first and second ends and a wall having a non-circular cross section with a top portion and converging side portions join the top portion and a bottom portion. A water inlet extends from the bottom of the body portion. A pair of water outlets extend from the top of the body portion and are located proximate the first and second ends of the body portion.

A system for performing fluid administration on a patient, the system including a flexible membrane forming a valve of a port having a valve seat, and an actuator having an actuator head, wherein the flexible membrane includes a membrane actuator clip configured to removably connect to the actuator head, the connection between the membrane actuator clip and the actuator head allowing the actuator to push the flexible membrane towards the valve seat to close the valve, and to pull the flexible membrane away from the valve seat to open the valve.

A gas distribution system, a reactor system including the gas distribution system, and method of using the gas distribution system and reactor system are disclosed. The gas distribution system can be used in gas-phase reactor systems to independently fine tune gas source locations and gas flow rates of reactants to a reaction chamber of the reactor systems.

Improved valve assemblies (e.g., multi-position valve assemblies) are provided. More particularly, the present disclosure provides for high efficiency multi-position rotary backwash valve assemblies. In exemplary embodiments, the present disclosure provides for a four-position rotary high efficiency valve assembly for a swimming pool or spa filter. The present disclosure provides multi-position valve assemblies having infrequent maintenance and allowing for user-friendly service. The present disclosure provides for improved multi-position valve assemblies and related features, systems and methods of use. Improved, convenient and effective systems and methods for utilizing improved multi-position valve assemblies (e.g., high efficiency multi-position rotary backwash valve assemblies) are provided. The valve assembly can be utilized in fluid systems as a flow control assembly (e.g., as a backwash valve associated with a pool or spa filter).

A hydrant for selectively valving and delivering fluid under pressure to a plurality of different fluid outlets. The hydrant housing has at least one fluid inlet and multiple fluid outlets. A valve operating shaft is mounted for axial rotation in the hydrant housing and positioned transversely to a valve seat having a first set of valve ports therethrough annularly arranged on a first circumference about the shaft, and a second set of valve ports are provided through the valve seat and annularly arranged on a concentric second circumference of different diameter than the first circumference about the shaft. A valve actuator disk secured for rotation with the operating shaft slidably engages the valve seat in a rotary fashion to selectively valve the valve ports open and closed in selected combinations with rotation of the shaft to preselected positions of rotation.