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Sumps (Rainheads) — Membrane Roof Drain Accessories

Pre-fabricated accessories reduce the join-count and remove difficulty and risk from a membrane installation. Sumps are made from 5052 aluminium or 316 stainless steel.  

Sumps: Order Code:
Outlet & Overflow:  Size: Aluminium: SS316:
80mm  340x250x80 2800.112 2800.113
100mm 400x250x200 2800.212 2800.213
150mm 600x450x200 2800.312 2800.313
Key Features
  • 5052 aluminium or 316 stainless steel
  • Pre-fabricated accessories
  • Reduced join-count 
  • Removes difficulty and risk from a membrane installation
NZ Made
NZ Made
NZ-Owned Business
NZ-Owned Business
Scope of Use

Suitable for use with:

  • liquid membrane
  • single layer membrane
  • multi-layer membrane
  • torch-on membrane
  • monolithic membrane*
Limitations on Use
  • For high corrosion zones such as coastal areas SS316 is recommended
  • *For use with monolithic membrane consult membrane supplier
Statement of Building Code Compliance
  • All product is designed to, and complies with AS/NZ3500
In-Service History

Used with sheet membrane waterproofing systems extensively throughout New Zealand systems for over 10 years.

B2 Durability compliant
E2 External Moisture compliant
External Moisture
Membrane Drain Downloads
Warranty: Membrane Drainage Fittings


Roof Drain Accessories: Sumps
CAD/PDF Details
Sump 80mm


Sump 100mm


Sump 150mm


Aquaknight offers premium drainage solutions for all modern membrane types: liquid, single ply, multi-layer, torch-on and monolithic.

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