Sewer Connection Diagram
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Sewer Connection Diagram Summary
This document is a technical diagram titled "Service Connection to Sanitary Sewer with Trap and Vent", produced by Stiffler McGraw (Engineers • Surveyors • Architects). It illustrates the proper installation of a residential or commercial building’s sanitary sewer connection, including trap, vent, and cleanout components.
Key Components & Specifications:
Viewport Stack:
- Must be installed with full-depth AASHTO #57 aggregate and ½" min. void all around.
- Minimum depth: 24".
- Class "A" concrete used for structural support.
- Screw cap with threaded plug required at top.
- Note: 4" viewport stack acceptable if service stub is also 4".
Sanitary Tee & Cleanout:
- Sanitary tees used at multiple junctions.
- Cleanout pipe length as required; must include trap, vent & cleanout assembly made of PVC Sch. 40 pipe and fittings.
- 90° bend specified near cleanout.
Vent System:
- Air vent cap required on vertical vent stack.
- Vent must extend at least 12" above grade.
- Optional trap & vent assembly noted.
Backflow Prevention:
- Backflow prevention device is optional but recommended.
- Connection to existing building sewer must use Fernco coupling with reinforced stainless steel bands or adaptor.
Building Wall & Sewer Line:
- Building sewer connects through wall with proper clearance.
- Maximum distance from building wall to vent: 5'-0".
Material Requirements:
- Pipe material: SDR-35 or adapt to Sch. 40 if applicable.
- Frame and cover (if used): East Jordan Iron Works Inc. , Pattern No. 1565 or Neenah Model No. R-1975-A2 or equal.
Purpose:
This diagram serves as a standard reference for contractors, inspectors, and homeowners to ensure compliant, safe, and functional sanitary sewer connections that prevent backups, odors, and environmental contamination.
(Note: Diagram is not to scale — N. T. S. )