ROYAL P657 P Series, 4 in nominal, Solvent Sewer Hub x Solvent DWV Hub end style, SDR 35, PVC

PF3801RADPT MFG #: P657
  • End Style: Solvent Sewer Hub x Solvent DWV Hub
  • Fitting/Connector Type: Coupling
  • Length: 3.68 in
  • Manufacturer Name: Royal Building Products, Westlake Pipe & Fittings
  • Material: PVC
  • Method of Manufacture: Molded
  • Nominal Size: 4 in
  • Schedule Rating: SDR 35
  • Series: P Series
Our SDR 35 solvent weld sewer fittings are engineered or maximum performance in the most demanding environments and ease of installation. They are designed and manufactured to consistent dimensions and laying lengths to deliver a securely sealed, watertight joint connection on every installation. Only virgin compounds are used in our injection molding process to ensure the highest quality and durability. All fittings are thoroughly tested for joint tightness, internal stress, stability, color and uniformity. SDR 35 solvent weld sewer fittings conform to all municipal, federal, and military requirements and are available in a wide range of sizes. Our PVC backwater valves are designed to be integrated with this series.
  • Features and More


  • Designed for easy assembly
  • Highest quality materials for long lasting performance
  • Consistent dimensions provide joint integrity
  • Broadest offering in the industry
  • Triple certification listing
  • Attention: Westlake Pipe & Fittings fittings are not to be used or tested with compressed air or gases


  • Onsite Disposal: Closed Loop Septic Fields
  • Open Septic Fields
  • Engineered Systems
  • Lateral Connections to Municipal Sewers: Sanitary
  • Storm and Surface Drainage: Foundation Drains
  • Radon Gas Venting
  • Yard Drainage


  • ASTM D3034
  • ASTM D1784
  • ASTM F1336
  • CSA B182.2
  • IAPMO Listed
  • NSF Approved
  • UPC Listed