4 in. Alum. Reroof Drain, 10 in. Poly Dome, Clamp Ring, Exp. Seal - 4 inch (fits 3-3/4 in to 4-1/4 in) FAST FLOW RETROFIT/REROOF DRAIN SET FOR SINGLE PLY. 10 INCH POLYETHYLENE DOME, POLY CLAMPING RING, 12 in. STEM, 16-1/2 INCH DIAMETER SPUN ALUMINUM BASE, EXPANDING SEAL. PRICE/EACH.
4 in. Alum. Reroof Drain, 10 in. Poly Dome, Clamp Ring, Exp. Seal
$242.00 SALE $172.25
(Savings: $69.75)
  Order Options:  
  Add To Cart  
  Add To Saved Cart  


4 inch (Fits 3-3/4 inch to 4-1/4 inch) Aluminum Fast Flow Retofit/Reroof Drain Set For Single Ply. 10 inch Polyethylene Dome, Poly Clamping Ring, 12 inch Long Drain Stem, 16-1/2 inch Diameter Spun Aluminum Base, Expanding Seal. Price/Each.


  • Shipping leadtime: 1-2 business days.


Drain consists of a 16-1/2 inch O.D. 0.081 inch heavy gauge spun aluminum drain flange and expanding seal for anti-back-up with 12 inches long aluminum downspout sized for 4 inch (Fits 3-3/4 inch to 4-1/4 inch) pipe size, 10 inch OD Polyethylene dome strainer, poly gravel guard / clamping ring.


Re-Roof Fast Flow Drains: Enable quick and easy retrofit of existing roof drains or new construction. Re-roof Drains are the easiest and most reliable solution for deficient existing roof drains in re-roofing applications. Reroof drains are designed to fit into the existing drain pipe, thereby bypassing all the inherent deficiencies of the existing roof drain assembly and saving the expensive removal of the existing roof drain. To create a positive seal with the inside of the existing drain pipe, the drains have a special, compressed high-density impregnated expanding seal. The special seal is activated to expand by removing a restraining tape immediately before installation into the existing pipe. ReRoof Drains are manufactured with a flat horizontal flange for flush mounting on the roofing or insulation surface to prevent damming of water. Each Drain includes a heavy cast clamping ring with bolts to securely compress and permanently seal the edge of the new roof membrane at the low point of the roof. Dome strainers bolt down to securely.


  • Outlets To Fit Drain Pipes: 2, 3, 4, 5, 6 inch size
  • Strainers: PVC, Cast Iron, Cast Aluminum
  • With or without expanding seal
  • With or without clamp ring

More Information


Email us at sales@bestmaterials.com or
Call us at 1-800-474-7570 or 602-272-8128
You'll get a prompt reply!

similar product terms: FF-375, BFF-375, F375-BS, reroof drain, roof drains, roof drain aluminum roof drain, heavy duty roof drain, martathon drain, fast flow drain, single ply reroof drain, single ply drain

  Associated Items:  
Marathon C16-0140 2 inch High Drain Overflow Insert
Marathon C16-0140 2 inch High Drain Overflow Insert. Spun Aluminum, 2 inch high x 4 inch ID with 8 inch OD base and 3 mounting holes. Price/Each. (shipping leadtime 1-2 business days)
$21.00 $14.75
Quantity:     Add to Cart

A CSG Group Company

Shop with
Peace of Mind!