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8" Membrane Drain (SCH40 connection)

8" Sanitary Membrane Drain (rooftop application used to exemplify & describe working principle only*) four 3/8" diameter Seepage Holes allow rainwater to drain below the surface rooftop media and cover, keeping drain covers visible and level with the media.  The top of the Drain is 2" above the top of the clamp plate, allowing for up to 2 inches of roof top media (such as gravel**) to be placed (the 2" does not include mount material or membrane).

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* Rooftop application used to exemplify & describe working principle only, actual application(s) dependent upon customer necessity and determination.


Glass bead blast finish, 1/2" plate cover with drilled holes, 4" SCH40 connection, 1/4" thick floor membrane (non-removable loose) clamp plate outer diameter 15", primary sediment basket and secondary screen.


MATERIALS: 316 Stainless Steel Body and Connection, 304 Stainless Steel Cover and Sediment Basket

LOAD RATING: 15,000 lbs 

** NOT RECOMMENDED FOR USE IN APPLICATIONS WHERE TOP MEDIA (above membrane clamp plate) HAS PARTICLE SIZES LESS THAN 1/2" IN DIAMETER OR MATERIAL ATTRIBUTES THAT MAY INCREASE RISK OF TOP MEDIA PASSING THROUGH THE 3/8" SEEPAGE HOLES IMMEDIATELY AND/OR OVER TIME (concretes, pea gravels, sands, soils, etc.) This is because smaller media will be much more likely to pass through the 3/8" diameter Seepage Holes, into the drain)

  • Drain Connection : PIPE (SCH40)
  • Drain Cover : Drilled Holes
  • Drain Size : 8"
  • Drain Style : Round
  • Drain Type : Membrane
  • material(s) : 304 and 316 Stainless Steel
  • Floor Drains & Clean Outs Sheet
    Koss Industrial's Floor Drains & Cleanouts provide a durable, high-quality solution for your drainage needs. This Linecard provides information relating to these products.