What is the different between PVC and HDPE?
HDPE and PVC are remarkably similar in their nature of responses to such stress loadings as internal pressure and soil loads. Although responses are similar, they are not identical. In fact the magnitudes of their respective strengths are dramatically different. others like PRESSURE RATING, To do a thorough comparison of PVC and HDPE, many other factors would have to be considered such as: material cost, installation cost, connection methods, and manufacturing test requirements. You can fine the answers here http://ezinearticles.com/?PVC-and-HDPE–… http://www.wikishoes.