Installation
 
  Buried
  Above ground
  Trenchless
  Subaquaeous
   
Buried

In most cases the most economical and safe pipeline installation is a buried FLOWTITE pipe without end-thrust. The soil will provide the support that the pipe needs, and keep it out of sight from vandals or saboteurs.

Since the pipes are not designed to resist full end-thrust, all unbalanced thrusts resulting from change in direction, tees, reducers, wyes etc. need to be resisted by thrust blocks for transfer of these loads to stable ground.

Further information at
"FLOWTITE Installation Guide for Buried Pipes – AWWA"

"FLOWTITE Installation Guide for Buried Pipes – AWWA – abbreviated version"