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Simple, straightforward and low shipping rates for these roof drains.


Commercial Roof Drains

PVC, ABS, and Cast Iron Small Area Roof Drains

Roof Drains provide effective internal drainage of water from the roof surface, and are a practical year-round solution to removing water from the roof surface in any weather or season. Recommended for installation in flat areas with decks that are constructed of steel, wood, or concrete, these roof drains are suitable for many installations. Looking for more drainage solutions? Click here.

Sioux Chief 15" Cast Iron Roof Drain
15inch cast iron roof drain
  • Constructed of a enamel-coated cast iron
  • Enamel-coated cast iron dome strainer with gravel guard
  • Strainer free area (free grate area): 75.75 square inches
  • No-hub couplings are available separately
  • Click here for dimensions
  • Proudly made in the USA USA flag button

Body Type Pipe Connection Price & Quantity
No Hub 3" $130.50
4" $130.15
6" $130.94
8" $130.47
15" Cast Iron Roof Drain Accessories
External water dam - 2" - more info $58.50
Sump receiver - 24" x 24" - more info $63.68
Underdeck clamp kit - more info $32.69
Threaded extension kit - more info $127.35

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Sioux Chief High Volume 20" Cast Iron Roof Drain
cast iron roof drain
  • Constructed of a enamel-coated cast iron
  • Enamel-coated cast iron dome strainer with gravel guard
  • Strainer free area (free grate area): 178 square inches
  • No-hub couplings are available separately
  • Click here for dimensions
  • Proudly made in the USA USA flag button

Body Type Pipe Connection Price & Quantity
No Hub 10" $288.24
12" $288.95
20" Cast Iron Roof Drain Accessories
External water dam - 2" - more info $65.25
Sump receiver - 24" x 24" - more info $108.00
Underdeck clamp kit - more info $58.95

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Small Area Roof Drain
Roof Drain
  • Available in PVC or ABS body
  • Complete with steel-threaded inserts for increased strength and longevity
  • Standard to the roof drains is a Dura-Coated cast iron clamp device with an integral gravel guard
  • Includes polyethylene dome strainer
  • Recommended for installation in flat areas with decks that are constructed of steel, wood, or concrete
  • Click here for a typical installation diagram
  • Click here for dimensions
Pipe Connection Price & Quantity
ABS
Price & Quantity
PVC
2" $57.47 $57.50

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Cast Iron Small Area Roof Drain
Roof Drain
  • Constructed of a Dura-coated cast iron body
  • Dura-coated cast iron clamp device with integral gravel guard
  • Heavy duty cast iron dome strainer
  • Available with No Hub or Push On
  • Click here for dimensions
Pipe Connection Price & Quantity
No Hub
Price & Quantity
Push On
2" $82.06 $95.58
3" $81.12 $96.82
4" $81.47 $97.37

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Plastic Roof Drain with Dome and Gravel Guard
Roof drain
8480
  • Available in ABS or PVC body
  • Includes dome and gravel guard
  • Dome is available in plastic or cast iron
  • Click here for dimensions
Description Pipe Conn. Price & Quantity
ABS
Price & Quantity
PVC
Roof Drain w/Plastic Dome 3" $54.74 $52.25
Roof Drain w/Cast Iron Dome 3" $60.32 $62.49
Roof Drain w/Plastic Dome 4" $54.85 $57.35
Roof Drain w/Cast Iron Dome 4" $60.84 $60.69
Roof Drain w/Plastic Dome 6" $95.29 $76.87
Roof Drain w/Cast Iron Dome 6" $99.39 $83.02

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Sioux Chief Light Commercial Roof Drain
roof drain with cast iron dome 3"
# 867-P3M
  • 3" PVC (gray) or ABS (black) base solvent weld hub outlet connection
  • Uses key and keyhole alignment system on dome strainer and gravel guard
  • U.V. resistant cast iron dome strainer
  • Click here for detailed dimensions
  • Proudly made in the USA USA flag button
3" PVC Roof Drain with Cast Iron Dome = $58.40
3" ABS Roof Drain with Cast Iron Dome = $58.45

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Cast Iron Combination Roof Drain & Overflow
Drain and Overflow
  • Constructed of a Dura-coated cast iron body
  • Dura-coated cast iron clamp device with integral gravel guard
  • Heavy duty, cast iron dome strainer
  • No-hub couplings are available separately (see directly below)
  • Click here for dimensions

Body Type Pipe Connection Price & Quantity
No Hub 2" $126.36
3" $127.12
4" $127.39

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No-Hub Couplers / Couplings
nohub couplings
  • Lightweight and easy to install
  • Designed for up to 60lbs of torque load
  • Includes stainless shield, 2 stainless clamps
  • They can be used to connect plastic, steel or cast iron pipe for low pressure drainage
  • Click here for many more no-hub couplings

Pipe Size Approx. OD
of pipe it fits
Price & Quantity
2" 2.375" o.d. $4.90
3" 3.500" o.d. $5.74
4" 4.500" o.d. $7.89
5" 5-1/4" o.d. $17.86
6" 6.625" o.d. $17.98
8" 8.625" o.d. $19.40
10" 10.75" o.d. $51.20
12" 12.75" o.d. $96.82

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Related Items & Accessories:
Home Sewer Vents

Plumbing Vent Roof Flashings

Flood Guard Protection For Floor Drains

Vent Pipe Filters

Commercial Roof Hydrants

Floor Sink


Frequently Asked Questions

Q. "What is Dura Coat?"
A. Dura coat is a specially formulated paint designed to resist cracking and chipping. Dura Coat is a latex based coating developed to be used with cast iron substrate.

Q. "What does No-Hub mean?"
A. No-Hub is the most widely used connection. It is achieved by butting No-Hub soil pipe or plastic pipe to the bottom of drain and securing it with a No-Hub joint clamp.

Q. "What is the difference between No-Hub and Push-on?"
A. No-Hub is secured by using a No-Hub coupling, and push-on has a gasket in the drain that goes over the pipe connection.

Q. "Do you offer any floor drains?"
A. Yes. We offer a variety of floor drains here.

Q. "What is an external water dam?"
A. Sometimes roofs are designed to contain a predetermined depth of water at all times for various reasons. Roof drains for installation in these types of roofs should be equipped with a water dam (watertight open top collar either internal or external of the dome), with its flood level at the prescribed elevation above deck to serve as a dam to retain the desired amount of water on the roof. Excess water floods over the dam and is discharged into the roof drainage system.

Q. "What does the sump receiver do?"
A. Sump receivers, sometimes called drain receivers, should be used with roof drains to compensate for deck opening irregularities and provide proper support for the drain. The sump receiver is a flat steel plate with a depressed center opening into which the roof drain body flange fits, the sump receiver is supported by the lip of the opening in the deck. In addition to easing the deck opening tolerance requirements, the sump receiver distributes the weight of the drain over a larger surface of the deck.

Q. "How does the underdeck clamp work?"
A.The underdeck clap is designed to be used in conjunction with the sump receiver. With the drain and sump receiver in place, the circular underdeck clamp is drawn tightly in place with hardware provided. This in effect sandwiches the sump receiver between the drain and the clamp.

Q. "What is the purpose of the threaded extension kit?"
A.The threaded extension is placed on the structural deck level to accommodate various thickness of insulation, thereby avoiding the necessity of tapering or feathering the insulation layer down to the fixed body flange level of the drain causing a loss of insulation value at the drain location.


Please note: While we strive to ensure every product we label as "Made in the USA" really is 100% made in the USA, it is also important to understand that sometimes manufacturers make changes to their products, or for various reasons may receive components or materials that they would normally purchase domestically from an overseas supplier - and they don't necessarily let distributors (like us!) know that they've changed something about the product or where it is manufactured.

If you receive a product that PlumbingSupply.com® says is "Made in the USA" and the product states it was manufactured elsewhere, please contact us. We will happily replace or refund your purchase to your satisfaction.


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