Abstract: A sprinkler head housing encloses, supports, and provides access to a sprinkler head in order to allow maintenance and access to the sprinkler head. The sprinkler head housing includes a top and a wall descending therefrom. The sprinkler head housing can accommodate sprinkler heads having differently sized diameters.

Abstract: A flexible inert gas impervious housing for the sampler which can be squeezed to an essentially flat configuration in conjunction with a close/open/close valve assembly at both ends of the flexible housing that the buoyancy can be minimized by applying a vacuum to the flexible inert gas impervious housing prior to positioning the same on the sampler array, or prior to securing to a sampler cable for lowering into a body of water is disclosed. Pressure release means are provided to optionally open the valve assemblies when a preselected pressure is reached, usually coordinated with depth of immersion, at which time the sampler flexible housing has the vacuum released and it opens and is flushed by the fluid through which it is passing. Thereafter, means are provided to close the two valve assemblies to entrap the sample, based upon a signal, and to return the sample for discharge from the sampler for further investigation.