WE were putting in a sewer line and got all the materials from Castailia trenching. WE had bought more than we needed for the job. We got 6 inch pipes instead of the 4 inch so as not to have a back up later on in the line. The price on the materials was the most reasonable anywhere around. The people here are wonderful to deal with. Anytime I need this kind of materials I will defiately go back. We were able to take back all the psrts we did not use for a complete refund. No restocking fee either.