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Commercial Roof Drains

PURPOSE - The roof drainage system is designed to receive rainwater as it falls on the roof and convey it to the street, sewer facilities or other means available for its disposal. Commercial roof drains should be sized to handle the maximum rainfall used as design criteria for a Roof Drain project. The rainfall that can be expected in a given locality can be obtained from the local code authorities or the nearest rainfall recording station. It is recommended that the local code authorities be consulted regarding the specific rainfall amount that they may anticipate for roof drain design purposes.

OVERFLOW RELIEF - The perimeter edge of a roof structure is generally elevated by parapets, cants or other means. A blockage in the drainage piping could cause a water buildup which could overload the roof structure. To prevent this occurrence, it is recommended that overflow relief measures such as scupper or parapet drains be specified at the ratio of at least one for each 20,000 sq. ft. of roof area. The invert elevation of the scupper should not be more than a safe water depth as determined in conjunction with the architect and structural engineer, not more than 5 inches above roof level on flat roofs and 6 inches above low point on sloped roofs.

PLACEMENT- The placement of roof drains is influenced by roof structure support columns, expansion joints, dividers and other projections. Careful consideration of these elements during the placement-planning phase is essential to provide adequate drainage for each Roof Drain area. Commercial Roof drains can be placed on a dimensional basis with a maximum limit from the edge of the roof and between drains.

QUANTITY - To minimize water ponding and insure complete drainage, two roof drains should be installed for total roof areas of 10,000 sq. ft. or less. For larger roof areas, roof drains should be installed at the minimum of one drain for each 10,000 sq. ft. of roof area. Commercial Roofs are of various shapes and dimensions, with sections which may be more or less than the 10,000 sq. ft. recommendation for each roof drain. Therefore, sometimes it will be necessary to depart from this recommendation as required for proper placement and uniform distribution of roof drains.

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Product ID: 029276T
 
Price: $173.75
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Product ID: 029279F
 
Price: $73.16
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Product ID: 032765
 
Price: $101.00
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Product ID: 032865
 
Price: $101.00
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Product ID: 032874
 
Price: $121.00
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Product ID: JS21500
Manufacturer: Josam
Josam 21500 Roof Drain 15'' Dome Large Sump

Roof Drain: Large Sump, Clamp Ring & Poly Dome

Specification

21500 Series coated cast iron Roof Drain, large polypropylene locking dome, WEJLOC non-puncturing clamp ring with integral gravel stop, large sump with wide roof flange and bottom outlet.

Reg Price: $394.00
Price: $131.00
Product ID: JS22010
Manufacturer: Josam
Josam 22010 12'' Beehive Dome Medium Sump

Roof Drain: Medium Sump, Clamp Ring & Cast Iron Beehive Dome

Specification

22010 Series coated cast iron roof Drain, medium beehive dome, non-puncturing clamp ring with integral gravel stop, medium sump with roof flange and bottom outlet

Reg Price: $348.36
Price: $114.96
Product ID: JS22080
Manufacturer: Josam
Josam 22080 9'' High Dome Small Sump Roof Drain

Roof Drain: Small Sump, Clamp Ring & Cast Iron Dome

Specification

22080 Series coated cast iron roof Drain with beehive dome, WEJLOC non-puncturing clamp ring with integral gravel stop, small sump with roof flange and bottom outlet.

Reg Price: $293.00
Price: $97.00
Product ID: JS22100
Manufacturer: Josam
Josam 22100 Series Combination Roof Drain and Overflow Drain Small Sump

Josam 22100 Series Combination Roof Drain and Overflow Drain Small Sump

22100 Series coated cast iron combination roof drain and overflow drain with cast iron dome, two Wejloc non-puncturing clamp rings with integral gravel stops,integral cast iron standpipe in cast iron deck flange and dual no-hub bottom outlets.

Reg Price: $405.00
Price: $133.72
Product ID: JS22200
Manufacturer: Josam
Josam 22200 Series Combination Roof Drain and Overflow Drain Medium Sump

Josam 22200 Series Combination Roof Drain and Overflow Drain Medium Sump

Specification

22200 Series Combination drain/overflow, Medium sump.

Reg Price: $1,082.00
Price: $358.00
Product ID: JS22500
Manufacturer: Josam
Josam 22500 Series Combination Roof Drain and Overflow Drain Large Sump

Josam 22500 Series Combination Roof Drain and Overflow Drain Large Sump

Specification

22500 Series Combination drain/overflow, Large sump.

Reg Price: $1,386.20
Price: $457.45
Product ID: JS23500
Manufacturer: Josam
Josam 23500 14'' Promenade Top Large Sump

23500 Series coated cast iron Roof Drain, square pedestrian grate set in square secured frame.

Specification

WEJLOC non-puncturing flashing collar with weepholes for 2" roof fill, large sump with wide roof flange and bottom outlet

Reg Price: $670.00
Price: $221.00
Product ID: JS23510
Manufacturer: Josam
Josam 23510 15

Roof Drain: Large Sump w/14" Dia. Extra Heavy Duty C.I. Parking Grate

Specification:

23510 Series coated cast iron Roof Drain, round extra heavy-duty grate set in round secured frame, WEJLOC non-puncturing flashing collar with weepholes, for 2" roof fill, large sump with wide roof flange and bottom outlet.

Reg Price: $869.00
Price: $287.00
Product ID: JS23710
Manufacturer: Josam
Josam 23710 11

Roof Drain: Medium Sump & 11-3/8" Square Cast Iron Promenade Top

Specification

23710 Series coated cast iron Roof Drain, round pedestrian grate set in square secured frame, non-puncturing flashing collar with weepholes for 2" roof fill, medium sump with roof flange and bottom outlet.

Reg Price: $599.00
Price: $197.99
Product ID: JS23730
Manufacturer: Josam
Josam 23730 9'' Promenade Top Small Sump

Roof Drain: Small Sump & 9" Sq. Cast Iron Promenade Top

Specification

23730 Series coated cast iron Roof Drain, round pedestrian grate set in square secured frame, non-puncturing flashing collar with weepholes for 2" roof fill and small sump with wide roof flange and bottom outlet.

Reg Price: $377.00
Price: $150.49
Product ID: JS23740
Manufacturer: Josam
Josam 23740 8

Roof Drain: w/Small Sump & 8" Sq. Heavy Duty Nikaloy Promenade Top

Specification

23740 Series coated cast iron Roof Drain, square heavy-duty ductile iron undergrate with Nikaloy top grate set in square secured frame, non-puncturing flashing collar with weepholes, for 2" roof fill, small sump with roof flange and bottom outlet

Reg Price: $1,160.00
Price: $383.00
Product ID: JS24020
Manufacturer: Josam
Josam 24020 9

Roof Drain: Composition Deck Flange & Super-Flo Grate

Specification

24020 Series coated cast iron SUPER-FLO Roof Drain, round medium-duty anti-tilting grate with perimeter drainage slots, set in round, non-puncturing membrane clamp ring and medium sump with 4" wide deck flange and bottom outlet, inside caulk connection.

Reg Price: $449.00
Price: $149.00
Product ID: JS24030
Manufacturer: Josam
Josam 24030 13

24030 Roof Drain: Composition Deck Flange, 11-3/4" C.I. Grate & Membrane Clamp

Specification:

24030 Series coated cast iron SUPER-FLO Roof Drain, round medium-duty anti-tilting grate with perimeter drainage slots, set in round, non-puncturing membrane clamp ring, large sump with 4" wide deck flange and bottom outlet.

Reg Price: $990.66
Price: $326.92
Product ID: JS24040
Manufacturer: Josam
Josam 24040 9

Roof Drain: Composition Deck Flange and Super-Flo Grate

Specification

24040 Series coated cast iron SUPER-FLO Roof Drain, round medium-duty anti-tilting grate with perimeter drainage slots, extension, non-puncturing membrane clamp ring and medium sump with 4" wide deck flange and bottom outlet inside caulk connection.

Reg Price: $560.00
Price: $184.81
Product ID: JS24050
Manufacturer: Josam
Josam 24050 Garage Drain 13

Roof Drain: Garage Drain with Wide Support Flange

Specification

24050 Series coated cast iron Garage Drain with wide support flange, weepholes, round special-duty grate and bottom outlet inside caulk connection.

Reg Price: $1,407.97
Price: $464.63
Product ID: JS24060
Manufacturer: Josam
Josam 24060 15

Roof Drain: Special-Duty, Composition Deck

Specification

24060 Series coated cast iron Roof Drain, round special-duty grate and large sump with 4" wide deck flange and bottom outlet, inside caulk connection.

Reg Price: $1,756.00
Price: $580.00
Product ID: JS24200
Manufacturer: Josam
Josam 24200 16

Prominade Drain: Removable S.S. Filter, Bonding Flg, C.I. Top

Specification

24200 Series coated cast iron adjustable ALL-LEVEL Roof Drain, round pedestrian grate set in round anchored frame leveled on adjustable threaded rods, removable perforated stainless steel filter, concrete forming and retaining ring, large sump with wide flange

Reg Price: $2,682.89
Price: $885.35
Product ID: JS24500
Manufacturer: Josam
Josam 24500 Sill Type 4

Sill Drain: w/Rough Bronze Dome

Specification

24500 Series coated cast iron Sill Drain, secured low bronze dome, bronze clamp ring, shallow sump with flashing flange and bottom outlet threaded connection.

Reg Price: $232.00
Price: $76.64
Product ID: JS24700
Manufacturer: Josam
Josam 24700 Parapet Type Sloping Grate

Parapet Drain: Rough Bronze Sloping Grate, Flashing Clamp & Side Outlet

Specification

24700 Series coated cast iron Roof Drain, parapet type, removable sloping bronze grate, flashing clamp, shallow sump with flashing flange and side outlet threaded connection.

Reg Price: $583.00
Price: $193.00
Product ID: JS24720
Manufacturer: Josam
Josam 24720 Parapet Type Angle Grate Roof Drain

Parapet Drain: Cast Iron Angle Grate, Flashing Clamp & Side Outlet

Specification

24720 Series coated cast iron Roof Drain, parapet type, secured angle grate integral with flashing clamp, shallow sump with flashing flange and side outlet threaded connection.

Reg Price: $369.00
Price: $122.00
Product ID: JS24900
Manufacturer: Josam
Josam 24900 Parapet Type Angle Dome Grate Roof Drain

Parapet Drain: Large Rough Bronze Angle Dome, Flash Clamp & Side Outlet

Specification

24900 Series coated cast iron Roof Drain, parapet type, secured bronze dome integral with flashing clamp, flashing flange and side outlet threaded connection.

Reg Price: $2,090.00
Price: $689.76
Product ID: JS25000
Manufacturer: Josam
Josam 25000 Parapet Scupper Sleeve

Parapet Scupper Sleeve: Cast Iron w/Flashing Clamp & Flange

Specification

25000 Series coated cast iron Roof Drain, parapet scupper-sleeve type, flashing clamp, tubular body with flashing flange and adjustable wall collar.

Reg Price: $521.00
Price: $172.04
Product ID: JS25010
Manufacturer: Josam
Josam 25010 Downspout Nozzle

Downspout Nozzle: Rough Bronze, w/Wall Flange

Specification

25010 Series cast bronze Downspout Nozzle, loose wall flange and inlet threaded connection.

Reg Price: $348.00
Price: $115.00
Product ID: JS25500
Manufacturer: Josam
Josam 25500 Flow Septor Large Sump

Flo-Septor: Large Sump, Clamp Ring & Solid Water Dam, Cast Iron

Specification

25500 Series coated cast iron FLO-SEPTOR Roof Drain, cast iron internal dome strainer, combined WEJLOC non-puncturing clamp ring and solid water dam, large sump with wide roof flange and bottom outlet.

Reg Price: $521.00
Price: $172.04
Product ID: JS25520
Manufacturer: Josam
Josam 25520 Flo Septor Medium Sump

Flo-Septor: Medium Sump, Clamp Ring & Solid Water Dam, Cast Iron

Specification

25520 Series coated cast iron FLO-SEPTOR Roof Drain, cast iron internal dome strainer, combined non-puncturing clamp ring and solid water dam, medium sump with roof flange and bottom outlet.

Reg Price: $401.00
Price: $133.00
Product ID: JS25540
Manufacturer: Josam
Josam 25540 Flow Septor Small Sump

Flo-Septor: Small Sump, Clamp Ring & Solid Water Dam, Cast Iron

Specification

25540 Series coated cast iron FLO-SEPTOR Roof Drain, bronze internal dome strainer, combined non-puncturing clamp ring and solid water dam, small sump with roof flange and bottom outlet.

Reg Price: $327.00
Price: $108.00
Product ID: JS26200
Manufacturer: Josam
Josam 26200 Expansion Joint

Expansion Joint: C.I. w/ABS Sleeve, Packing Gland & Pressure Ring

Specification

26200 Series coated cast iron Expansion Joint, schedule 80 PVC sleeve, packing gland with bolted pressure ring, male inlet and female outlet threaded connections.

Reg Price: $368.00
Price: $122.00
Product ID: JS26440
Manufacturer: Josam
Josam 26440 Stack Flashing Fitting

Stack Flashing Fitting: Cast Iron w/Flashing Recess

Specification

26440 Series coated cast iron Stack Fitting with counterflashing recess, threaded stack and extension connections.

Reg Price: $105.00
Price: $35.00
Product ID: JS26450
Manufacturer: Josam
Josam 26450 Vent Stack Flashing Sleeve

Vent Stack Flashing Sleeve: Cast Iron w/Caulking Recess

Specification

26450 Series coated cast iron Stack Sleeve, with counterflashing and caulking recesses.

Reg Price: $34.00
Price: $11.00
Product ID: JS26700
Manufacturer: Josam
Josam 26700 Vandal Proof Vent Cap

Vandal-Proof Vent Cap: Cast Iron Vandal Proof Hood & Securing Screw

Specification

26700 Series coated cast iron Vandal-Proof hooded Vent Cap, with large frost-proof openings, counterflashing collar, deep protective hood and recessed securing screws.

Reg Price: $232.00
Price: $77.00
Product ID: JS28600
Manufacturer: Josam
Josam 28600 Flo-set 15

Flo-Set Roof Drain: Calibrated Vane Collar, Clamp Ring & C.I. Dome

Specification

28600 Series coated cast iron FLO-SET Roof Drain with large secured dome, adjusted calibrated Vandal-Proof vane collar, WEJLOC non-puncturing clamp ring with stationary vanes and integral gravel stop, large sump with wide roof flange and bottom outlet.

Reg Price: $1,046.00
Price: $345.28
Product ID: JS29000
Manufacturer: Josam
Josam 29000 Isolation Deck Drain

Roof Drain: Isolation Deck Drain with Non-Puncturing Clamp Ring for Standpipe

Specification

29000 Series coated cast iron Isolation Deck Drain with non-puncturing clamp ring for standpipe, with bottom outlet connection.

Reg Price: $395.00
Price: $130.00
Product ID: JS29100
Manufacturer: Josam
Josam 29100 16

Josam 29100 16" Dome, Extra Large Sump

Josam 29100 Series coated cast iron Roof Drain with large cast iron dome, non-puncturing clamp ring with integral gravel stop, large sump with wide roof flange and no-hub bottom outlet.

Reg Price: $1,053.00
Price: $347.28
Product ID: JS19800
Manufacturer: Josam
Josam J 19800 Jiffy Joint Gasket
Discounts Apply !
25% Discount on This Item

Jiffee-Joint Gasket: for 2" Service Weight Pipe

Also suitable for connecting PVC Thin Wall, DWV Copper and Glass pipes to Josam drains, cleanouts, or other products having 2" inside caulk outlets.

Reg Price: $27.00
Price: $13.50
Product ID: RD304BDK
 

RD304-B-D-K 4" Ductile Iron Dome,Underdeck clamp, Sump RCVR

Price: $206.00
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