Apparatus for keeping a rain water well unfrozen

Apparatus for pneumatic transportation of sanitary waste...

Apparatus for preventing soil inflow in intercepting sewer

Apparatus for separating a light fluid from a heavy one...

Apparatus for sewer cleaning and the like

Apparatus for stormwater retention and release, and method...

Apparatus for the distribution of water or other liquids

Automatic back water valve system

Backwater valve

Ballasting system for on-site sewage treatment and disposal...

Bar screen having compound fine screen bar rack

Basement floor drain and method

Beaver control device for a culvert pipe

Box culvert

Box culvert

Branch members for soil and waste systems

Bulldozer/pipelayer combination

Casing spacers

Catch basin insert for treating storm water

Catch basin structure for interception of contaminants