A drinker system, comprising: a central pressure regulator configured regulate a fluid pressure to a regulated input pressure; and a plurality of pressure reducers each comprising: a high-pressure zone configured to receive the fluid from the regulator at the regulated input pressure, a low-pressure zone configured to provide the fluid to one of multiple drinker lines at a low output pressure maintained at a constant proportion to the regulated input pressure, and a moveable integral piece comprising a small diaphragm rigidly connected to a large diaphragm, wherein the small diaphragm is disposed in the high pressure zone and the large diaphragm is disposed in the low pressure zone, and wherein the constant proportion between the low output pressure and the regulated input pressure corresponds to the ratio between the surface area of the small diaphragm and the surface area of the large diaphragm.

The invention provides lighting system for illuminating a target surface in an agricultural environment for a flock of birds, wherein the lighting system comprises a plurality of lighting devices spaced apart on an elongated axis, wherein each lighting device comprises: a connector for electrically connecting the lighting device to a power line; a housing comprising a light exit window; at least one solid-state light source arranged within the housing, wherein the at least one solid-state light source is configured to emit light source light; wherein each lighting device is configured to shape the light source light into a light beam, and configured to emit the light beam along a main optical axis via the light exit window onto the target surface; wherein adjacent lighting devices of the plurality of lighting devices are spaced apart with a spacing (S); and wherein the light exit windows of the adjacent lighting devices are arranged at a distance (H) from the target surface; wherein each respective light beam of the adjacent lighting devices has an angular light distribution with a Full Width Half Maximum (FWHM); wherein

[00001]$\mathrm{FWHM}<F*2*{\tan }^{-1}\left(\frac{S}{2H}\right);$

wherein FWHM is said Full Width Half Maximum (FWHM); wherein S is said spacing (S); wherein H is said distance (H); and wherein F is a factor in the range between 0.1 and 1.

A support mounting mechanism for mounting an apparatus at an elevated height on a surface includes a support sleeve and an apparatus. The support sleeve has a substantially U-shaped profile and a length. The U-shape has a closed rear end and an open front end. The rear end of the U-shape is attachable to the surface. The apparatus has a handle with a length and a cross-sectional shape that seats in the U-shaped sleeve to hold the apparatus at the elevated height. The apparatus has an upper portion positioned above the handle that has a width that is larger than the width of the U-shaped profile such that the upper portion of the apparatus serves as a stop.

A frost free poultry watering device that connects to a water supply. The device is installed partially buried, in particular in areas that have freezing weather conditions. A pedestal inserts into the ground and houses a water supply conduit. The water supply conduit connects to an underground source of water. The device has a manifold having one or more arms each having a poultry watering nipple attached thereto. The manifold is in fluid connection with the water supply conduit. A poultry, such as a chicken, steps on the step, causing the step to move down. The downward movement of the step actuates a valve that opens the fluid connection between the water source and the water supply conduit, allowing water to flow to the nipple(s). Preferably a second valve is positioned on the water supply conduit that opens to drain the conduit when the poultry steps off the step.

A water control and seal structure of a pet drinking pipe including a drinking pipe body, wherein a water outlet head is provided on the drinking pipe body, a water outlet is defined in the water outlet head, a water outlet steel ball is provided in the water outlet, and the water control and seal structure is provided between the water outlet head and the drinking pipe body.