ST for Double Wall Ducts

METU special drain fittings for insulated, double-wall rectangular or round ducts.

The length of the drain can be manufactured according to your specifications
(min. order quantities for at least 100 pieces apply).

Special tools are required for trouble-free installation.


  1. Inner duct wall
  2. Insulation
  3. Outer duct wall
  4. Longer drain fittings
  5. Conical washer
  6. Nut
  7. Funnel
  8. Cap
  9. Socket Wrench
  10. Drain nozzle clamping tool