Coming in 2008! NPP and our product offering will be growing! By late summer we will be producing ASTM F679 sewer and AWWA C-905 pressure pipe in sizes through 24”, as we add 25% to our capacity. Contact us for more information! April 25, 2008 Update: Our Hampton expansion is ahead of schedule and we expect to be producing on our new line in June. This line will produce sizes through 24” in both C-905 pressure and F-679 sewer. We will be updating the technical data on this website during the next few weeks and giving further status reports.