Frank Pattern Membrane Clamp


  • Model 850-006
  • Fits all of the Frank Pattern brand roof drains

Frank Pattern 850-006 Membrane Clamp:

  • The Frank Pattern membrane clamp is bolted to the roof drain body.
  • It is designed to create a water tight seal by compressing the roof membrane between the drain bowl and the membrane clamp.
  • This clamping ring is used on the 850-series of roof drains, including the bottom outlet, side outlet and combination roof drain and overflow.
  • 100% cast iron construction with a corrosion resistant costing.

Outside Diameter8″-in.

Bolt-to-Bolt  5-1/2″-in.


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