Liquid flow apparatus

Liquid transport apparatus

Liquid waste material conveying system for toilets and the like

Low profile backwater valve

Manhole adjusting extension ring section

Manhole assemblies

Manhole separator

Means and method for disposal of effluents

Method and apparatus for handling water at low and high feed...

Method and apparatus for injecting foam into a pipe

Method and apparatus for installing culverts

Method and apparatus for installing highway drainage mat

Method and apparatus for lining manhole assemblies and the like

Method and apparatus for removal of utility line and...

Method and apparatus for separating floating and...

Method and mechanism for the installation of plastic pipes...

Method and system for the recuperation of septic tank content

Method for injecting surface water into the ground

Method for installing elbows for sewers

Method for laying data cables and data transmission device...