Schedule 40 PVC DWV Stack Adapter 4 Inch
A stack adapter fitting in Schedule 40 PVC for vertical DWV pipe connections in multi-floor drainage, non-pressure. Under HTS 3917.40.00.50 as other DWV plumbing fittings for building soil stacks. No-hub design for easy alignment.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cast iron compatible no-hub adapter
Adapters for metal pipes may classify under Chapter 73 fittings.
If offset or sanitary tee adapter
Specialized stack configurations have unique subheadings.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Certify wall thickness meets Schedule 40 for DWV to distinguish from thinner sewer specs
• Use detailed photos in entry docs showing no pressure markings
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