Large Area Roof Drain, 15 inch, Al. Dome, UD Clamp/Pl, Select OUTLET - Watts RD-300-D Large Area Roof Drain, 15 inch Cast Iron, 12 inch Cast Aluminum Dome, Clamping Ring, Underdeck Clamp. Direct Connection Outlet. Price/Each. (Specify outlet SIZE before adding to cart; poly dome shown in photo)
Large Area Roof Drain, 15 inch, Al. Dome, UD Clamp/Pl, Select OUTLET
$499.00 SALE $232.95
(Savings: $266.05)
  Order Options:  
  Add To Cart  
  Add To Saved Cart  
PRODUCT: Watts RD-300-D Large Area Cast Iron Roof Drain, 12" Polyethylent Dome, Clamping Ring. 15" Epoxy Coated Cast Iron Bowl, underdeck clamp. Direct Connection Outlet for 3, 4, 6, 8 or 10 inch pipes. Price/Each. (poly dome shown in photo)

Ordering Notes: Select Outlet SIZE before adding to cart.

CONSTRUCTION: Marathon BHWL Series / Watts Drainage RD-300-D epoxy coated cast iron roof drain with flashing clamp with integral gravel stop, self-locking polyethylene dome, underdeck clamp, and no hub (standard) outlet.

APPLICATIONS: New installation high volume roof drain for flat & membrane roofs. Net Free Area 137 sq inches. Drain includes a heavy cast clamping ring to securely compress and permanently seal the edge of the roof membrane at its most vulnerable position - the low point of the roof. Replaceable dome strainers bolt down to securely prevent vandalism.

  • Direct Connect Outlets: 3, 4, 5, 6, 8, 10" pipe sizes
  • Galvanized Body and Clamp (-13)
  • Sump Receiver (-B)
  • Underdeck Clamp (-D)
  • Adjustable Extension Flange (-F)
  • Domes: Ductile Iron (-K), Galv. Dome (-K13), Low Ductile Iron Dome (K40), Aluminum Dome (-K80), Rough Bronze Dome (K81), SS Mesh Covered Dome (-K83), Vandal Proof Dome (-L)
  • 2: External Water Dam (-R)
  • Adj. Internal Water Dam (-W) 

similar product terms: large area roof drain, watts rd-300, rd300, watts rd-300, marathon rd-300, 15 inch roof drain, marathon large area roof drain, single ply roof drain, tpo roof drain, epdm roof drain, pvc roof drain, zurn z100, zurn z-100, z100, z-100, 15 roof drain, 15" roof drain

  Associated Items:  
12 in. Cast Aluminum Drain Dome / Strainer, Self Locking
12 inch Cast Aluminum Drain Dome / Strainer. 12-1/4 inch OD x 6.2 inches high, self locking. Replaces most popular 12 inch OD drain domes (14-15 inch drain bowl) for Roof Drains. Price/Each. (aka Watts # B2KDM)
$76.00 $57.75
Quantity:     Add to Cart
Large Area Roof Drain, 15 in. Cast Iron, Plastic Dome, Select OUTLET
Watts RD-300 Large Area Roof Drain, 15 in. Epoxy Coated Cast Iron, 12 inch Polyethylene Dome, Clamping Ring. Direct Connection Outlet for 3 to 10 inch pipes. Price/Each. (Marathon BHWLxxXL; Select outlet SIZE before adding to cart)
$163.00 $128.25
Watts BD2-S Roof Drain Sump Receiver for Large Roof Drains
Watts BD2-S Roof Drain Sump Receiver. 23-1/3 inches square, 10-7/8 Hole, 1/2 inch downset, 20 gauge galvanized steel. Fits Watts Large Roof Drains: RD-100, RD-300. Price/Each.
$59.00 $49.95
Quantity:     Add to Cart

A CSG Group Company

Shop with
Peace of Mind!