How To Look At A House
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What is the difference between green and white sewer drain pipes?
Monday, June 18, 2018
The green sewer drain pipe is used for the final underground run from a house to the municipal sewer or septic tank. It is manufactured to be compliant with “ASTM D 3034” standard and is often referred to as “3034” pipe. It is PVC, but a lighter weight than white Schedule 40 DWV (Drain-Waste-Vent) pipe. The pipe is intended for gravity-feed waste drain systems and not designed to be pressurized.
“The green 3034 is thinner and also has a smaller outside diameter than schedule 40,” according to plumber James Freeman, of J.W. Freeman Plumbing in Gainesville, Florida. “It is easily collapsed (pinched closed) or cracked by tree roots in the area. In my opinion, it is not a good pipe and we do not ever use it. We see a lot of it on new construction projects where the builder was looking for the lowest price possible, but I would never recommend using it. It’s always better to just pay a little more for the good stuff in the beginning than to pay a lot more to replace it later.”
The standard wall thickness of 3-inch nominal size green 3034 pipe, according to United States Plastic Corp., is 0.070”. When compared to the 0.216” wall thickness for white Schedule 40 PVC, a quick math calculation tells you that the wall thickness of white PVC is three times the green PVC.
For the chemical names behind the acronyms for plastic plumbing pipes, visit our blog post What do the ABS, PVC, CPVC, PB, and PEX plumbing pipe names mean?
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