Portals Plus 67301 67311 67321 aluminum scupper drains deliver engineered water management for flat and low-slope roof assemblies. These precision components channel controlled quantities of water off the roof while protecting membrane details and structural elements.
Specify with confidence using the dimensional and performance data below, which aligns with common commercial roofing standards for outlets, restraints, and cleanout access.
| Model | Primary Use | Standard Dimensions | Max Flow Rate |
|---|---|---|---|
| 67301 | Vegetated roof drains with overflow | 6 in body, 8 in flange | 12–18 GPM |
| 67311 | Concrete deck scupper leader connection | 7 in body, 9 in flange | 20–28 GPM |
| 67321 | Ins membrane re-roof and retrofit | 8 in body, 10 in flange | 30–40 GPM |
Design and Compatibility for Commercial Roofs
Architectural Integration
Portals Plus 67301 67311 67321 aluminum scupper drains integrate with tapered insulation, structural decks, and vegetated assemblies. The anodized aluminum bodies resist corrosion and maintain appearance across varied climates.
Connection Interfaces and Leader Sizing
Each model aligns with standard 3006 or 4006 scupper leader outlets, simplifying coordination with sheet metal and downspwork. Verify hose bib, clamps, and anchor patterns match project specifications before final fastener selection.
Installation Best Practices and Field Adjustments
Membrane Preparation and Flashing Details
Detail the membrane termination with compatible counterflashing, adhesive edge bead, and compression to prevent lateral movement. Maintain positive drip edges and slope toward the scupper to avoid ponding water.
Fastening and Alignment Sequence
Sequence bolts, apply approved sealant at flange per manufacturer guidance, and use temporary clamps until the membrane seals set. Confirm leader drop connections are drip-tight and support intended hydraulic loads.
Performance in Real Roof Conditions
Overflow Capacity and Freeze Management
Design auxiliary overflow paths for extreme events, and verify that internal flow paths remain unobstructed by debris. Confirm freeze-thaw compatibility when used in mixed climates with frequent cycling.
Long-Term Service Expectations
Routine visual inspections, seasonal debris clearance, and gasket checks extend service life. Replace worn seals promptly to avoid accelerated wear at mechanical fasteners and connection points.
Specifications and Selection Recommendations
- Confirm membrane thickness and termination method with each model flange configuration
- Match maximum flow rates to local code overflow requirements and roof slope
- Verify anchor pattern and embed depth for substrate type and fastener chemistry
- Inspect painted or anodized finish condition during scheduled maintenance visits
- Document field adjustments, sealant type, and observed performance in maintenance logs
Final Guidance on Portals Plus 67301 67311 67321 Aluminum Scupper Drains
Selecting the correct Portals Plus 67301 67311 67321 aluminum scupper drains ensures reliable water removal and long-term compatibility with roof assemblies. Use the outlined specifications, installation practices, and maintenance protocols to align system performance with project expectations and code compliance.
FAQ
Reader questions
Which roof membrane types work best with Portals Plus 67301 67311 67321 scupper drains?
These models perform reliably on EPDM, TPO, PVC, and modified bitumen membranes when installed with compatible flashing and counterflashing details.
What maintenance intervals are recommended for the 67301 67311 67321 series in coastal environments?
Quarterly debris clearance and pre- and post-season inspections help maintain flow capacity and reduce corrosion risk from salt exposure.
Can the 67311 be adapted for use with steel edge channels and parapet walls?
Yes, using approved adapters and clamps, the 67311 aligns with standard steel edge channels to provide secure leader ties and positive water capture.
How do I verify that the chosen size matches the design overflow requirements for my project?
Cross-reference roof area, rainfall intensity data, and overflow path capacity to confirm that the selected 67301 67311 67321 model meets project drainage criteria.