Sealed membrane side and bottom connection adapter


When water storage for reuse is the goal, reliable, waterproof and easy to construct connections in the waterproof membrane are of the upmost importance.


The 110mm ⌀ Invert Membrane Sealed Tank Adaptor has been developed to provide a fully welded watertight and secure rigid connection point for a drainage pipe to an attenuation tank. Fixed to the top or bottom edge of a tank, the flexible Permalon membrane allows a watertight heat seal on to the impermeable membrane surrounding the attenuation tank. The adapter can provide a connection at true invert level, allowing the tank to empty completely without leaving any residue. The membrane adaptor is compatible with standard 110mm ⌀ push fit couplings. Other ⌀ connections can be produced to specifications, as well as connections at specific levels above invert level, to serve as emergency overflow for example

“The units are designed with tomorrow’s  world in mind. Made from 100% recycled  materials now, and again 100% recyclable  in  the future.”

Ron van Raam, CEO Permavoid 

Features & Applications

Key features:

  • 100% watertight
  • Secure connection point
  • Heat-welds on site to standard Permalon liners
  • Side adapter with standard 110mm ⌀ connection. Other sizes made to specifications
  • Bottom adapter with standard 110mm and 160mm spigot.
  • Empties to true invert level, or creates an overflow at specified level
  • Spigot length 90mm
  • HDPE Spigot
  • Permalon liner

Common applications

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