A system and method of performing maintenance on a wing cock valve coupled to a pressurized gas delivery pipe is provided. The method removing a plug from a port on the valve. A threaded portion of a grease tool is coupled to the port, the grease tool having a body coupled to the threaded portion and a fitting on an opposite end, the fitting, body and threaded portion defining a flow path. A hose is coupled on a grease gun to the fitting; and actuating the grease gun to flow a grease from a reservoir through the flow path and into the valve.

A push-fit spigot. The spigot includes a push-fit coupling member removably disposed within an internal passage of a body of the spigot. The coupling member enables simple push-fit installation of the spigot on a stub-out in a structure. The coupling member is retained within the internal passage of the spigot by a removable fastener. A removal plate is installed on the stub-out prior to making insertion of the stub-out into the coupling member. Removal of the spigot from an installation on the stub-out is simply performed by removing the fastener between the coupling member and the body to enable removal of the body. The removal plate is then useable to depress a release collar in the coupling member to disengage the push-fit mechanism therein from the stub-out.

The present invention relates to a tap (1) for producing and disconnecting a fluidic connection between at least two connector parts (2, 4). The inventive tap comprises one connecting and disconnecting element (6), a manual actuating element (10) for rotating the connecting and disconnecting element (6), wherein the manual actuating element (10) and the connecting and disconnecting element (6) are coupled mechanically, a main body (12), wherein the main body (12) comprises at least one connector part (2) and an interior space (14) for receiving the connecting and disconnecting element (6), wherein the interior space (14) comprises a contact surface (16) for being brought into contact with the connecting and disconnecting element (6), wherein the contact surface (16) is of negative configuration at least in sections with respect to the conical surface component (28) of the connecting and disconnecting element (6), wherein at least one spring element (34) is provided for form-fitting fixing the position of the connecting and disconnecting element (6) with respect to the main body and preferably the spring element (34) is additionally provided for producing a surface pressure and/or for fixing the contact faces between the contact surface (16) and the conical surface component (28) of the connecting and disconnecting element (6), wherein the spring element (34) is arranged in or on the main body (12) and the connecting and disconnecting element (6) for dismantling or assembling can be moveable against the spring element (34) in its axial extension direction.

A medical endoscope is an instrument having an elongate, tubular shaft. The instrument is commonly provided with a flushing device. The flushing liquid can be guided through corresponding separate liquid channels. In order to be able to control the flow of the liquid, the liquid channels have a stopcock. The stopcocks here are of complex construction, and for this reason both the production thereof and the cleaning thereof are complicated. The invention includes a stopcock and also a housing and a method for producing the housing, by way of which the production and the cleaning of the housing are simplified. This is achieved in that a housing and at least one spring element for form-fitting fixing of a plug in a position in the interior space of the housing are manufactured integrally from a single part, that is to say in one part.