You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

Interbalcony Down-pipe Junction — 65mm

Aquaknight Down-pipe Junctions are high-flow, uPVC outlets which enable the efficient management of drainage from balconies by connecting the down-pipe of an upper level balcony drain with that of a lower balcony drain outlet or overflow. Intended to be used in conjunction with single-layer, multi-layer or monolithic waterproofing membrane systems.

  • Vented or non-vented
  • Big or small flange
  • Bottom exit
  • Inlet size: 65mm
  • Outlet size: 65mm
Key Features
  • Vented options for drainage of the mounted surface
  • Non-vented options for where drainage of the mounted surface is not required
  • Big or small flange options 
  • Stainless steel clamping ring
  • Engineered clamping range 0-10mm membrane thickness for single-layer, multi-layer, torch-on and monolithic waterproofing membrane systems
  • FLowLab report available
NZ Made
NZ Made
Scope of Use
  • Suitable for use as outlets and/or overflow drains in conjunction with a variety of modern waterproofing membrane systems:
    • single-layer waterproofing membranes
    • multi-layer waterproofing membranes
    • torch-on waterproofing membranes
    • monolithic waterproofing membranes
  • Vented options for drainage of the mounted surface
  • Non-vented options for where drainage of the mounted surface is not required
  • Big flange for general application
  • Small flange for confined spaces and where the down-pipe is mounted close to the vertical wall
  • Engineered clamping range 0-10mm membrane thickness; suitable for all modern waterproofing membranes
  • Residential and commercial applications
  • All corrosion zones as defined in NZS 3604:2011
Limitations on Use
  • Not to be used where membrane build-up exceeds 10mm in clamping area
  • For micro-climates as defined in NZS 3604: 2011, contact Aquaknight for material selection information
  • For use with monolithic hot-melt membranes, consult membrane supplier
NZS 3604 Corrosion Zone B suitable
Corrosion Exposure Zone B
NZS 3604 Corrosion Zone C suitable
Corrosion Exposure Zone C
NZS 3604 Corrosion Zone D suitable
Corrosion Exposure Zone D
Statement of Building Code Compliance

If designed, installed and maintained in accordance with Aquaknight Industries’ requirements, the Aquaknight Down-pipe Junction will meet or contribute to meeting the following provisions of the NZBC:

  • B1 Structure B1.3.1, B1.3.2, B1.3.3 (a, b, c, j)
  • B2 Durability B2.3.1 (b)
  • E1 Surface Water E1.3.3 (a, b, c, d, e, f)
  • F2 Hazardous Materials F2.3.1
In-Service History

Used in thousands of residential and commercial installations across New Zealand for over ten years

Other Performance Attributes
  • Flow rates vary between product models, consult individual FlowLab reports to establish exact flow rates

Warranty and Maintenance

Warranty for exterior membrane drainage outlets: 

Free from defects of material and workmanship for 15 years. Tea staining may occur over time. This is not considered a material defect and is not covered under warranty terms.

Maintenance for exterior membrane drainage outlets: 

Regular inspections (at least monthly, and after every significant storm) should be conducted to remove any accumulation of debris from box-gutters, sumps and around the drain areas. Accumulation of such material can lead to blocked drains and overflow events. The overflow outlet discharge pipes should be monitored during rain events. Any water discharge is an early warning that may indicate a partially blocked drain.

E1 Surface Water compliant
Surface Water
CAD & Revit Downloads
PASS Product Statement: Aquaknight Down-pipe Junction

PASS no. 19027

FlowLab Testing
Warranty: Membrane Drainage Fittings


Down-pipe Junctions 65mm

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

Product Enquiries

News from Aquaknight

Sealing Modern Waterproofing Membrane Drainage Systems
New Solution for Drainage on Skillion Membrane Roofs
Aquaknight Drains Complete Warm Roof System at Whakapapa
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.