Commercial Roof Drain Ring Specifications

The following is the most comprehensive table of commercial drain ring specifications available. Find all the top manufacturers, along with their drain ring model numbers, measurements, bolt numbers and types, materials and colors.  

If you have any questions, or would like to order a replacement ring, please contact the Drain Wizard.  

Abbreviation Glossary:

For instructions on how to properly measure a roof drain ring, visit our overview page
  
Manufacturer Model # /
Part #
O.D. I.D. 180°
B-to-B
Adjacent 
B-to-B
No. / Bolt
Type
Material Color Mfg's
Casting #
Notes
Blake K Series 2-4" outlet 11-1/2"   10-7/8" 9-1/2" 6-3/4" 4 / 3/8-16 Cast Iron Black   No mfg's parts available. Ring has holes, not slots. 
Blake K Series 8" outlet 15-7/8"   15" 11-1/4" 7-3/4" 4 / 3/8-16 Cast Iron Black   No mfg's parts available. 
Canplas [small]
2-4" outlet
38355 8"  7-1/2" 5-1/2" 4" 4 PVC Grey    
Canplas [large]
6-8" outlet
38355 13"  12-1/2" 11" 7-3/4" 4 PVC Grey    
Frank Pattern 850 Series 8-1/2"  8" N/A 7-1/4" 3 Cast Iron Powder Blue    
Froet 100C2 11"  8-5/8" 7" 4-15/16" 4 Cast Iron Yellow   Froet is a dual outlet drain that works as a regular and overflow drain. 
Froet 100C4 13-1/4"  11-7/8" 9-7/8" 7" 4 Cast Iron Yellow  
Froet 100C6 17"  15-7/8" 13-15/16" 9-3/4" 4 Cast Iron Yellow  
Froet 100C8 23"  21-7/8" 19-7/8" 13-3/4" 4 Cast Iron Yellow  
Josam 414 / 010350 13-1/2" [may vary from 13" to 13-1/2"]  12-1/2" 10-1/2" [these are pads not bolt slots] 7-1/2" [these are pads not bolt slots] 4 / Post Clamp Cast Iron Green 010350  Uses post clamps. A Zurn Z100 dome fits this ring.
Josam 415 / 010520 15-1/4" [may vary from 14-3/4 to 15-1/2"]  14-1/4" 11-1/2" [these are pads not bolt slots] 8" [these are pads not bolt slots] 4 / Post Clamp Cast Iron Green 415  Uses post clamps. A Wade 3508 Dome fits this ring.
Josam 416 / 010660 15-3/4" [may vary from 15-1/4 to 15-3/4"]  14-1/2" 12-1/4" [these are pads not bolt slots] 8-1/2" [these are pads not bolt slots] 4 / Post Clamp Cast Iron Green 416  Uses post clamps. A Wade 3508 Dome fits this ring.
Josam 418 / 010800T 17-1/2"  16-1/2" 14-1/4" [pads] 13-1/4" [slots] 10" [pads] 9" [slots] 4 / Post Clamp Cast Iron Green 418  Can use post clamps or bolts.
Josam 21500 / 029269 13-3/4"  13-1/4" 10-1/4" 7-1/2" 4 / 3/8-16 Cast Iron Green 029269  Also referred to as a 4114 New Style.
Josam 22010 / 011440 11"  10-1/4" 9" 6-1/4" 4 / 3/8-16 Cast Iron Green 011440   
Josam 22040 / 011680 8-1/2"  8" N/A 5-3/4" 3 / 3/8-16 Cast Iron Green 22040   
Josam 22060 / 011230 7-1/2"  6-3/8"* N/A 5" 3 / 3/8-16 Cast Iron Green 22060  * Dome sits outside of the gravel stop.
Josam 22080 / 011420T 8-1/2"  8" N/A 5-1/4" 3 / 3/8-16 Cast Iron Green 22080   
Josam 22202 / 030711 10"  8" 6-1/2" [holes not slots] 4-3/4" [holes, not slots] 4 / 3/8-16 Cast Iron Green 22202   
Josam R700 Universal Ring 15" [outside gravel stop is 13-3/4"]  13-1/8" 9-1/4" [slot is 2" long, 9-1/4" is center] 6-1/4" 4 / 3/8-16 Cast Iron Green 029270   
Marathon 10" ULRD PVC 10-1/8"  9-7/8" N/A 6" 3 / 1/4-20 Cast Aluminum Grey FC2US   
Mifab R1100 8" [9" at the 'ears']  7-1/2" N/A 5" 3 / 3/8-16 Cast Iron Red A1-C3   
Mifab R1200 13-5/8"  12-3/8" N/A 8" 3 / 3/8-16 Cast Iron Red A2-C3   
Olympic / OMG Hercules HDAL Series 10-1/2"  9-3/4" 7-1/8" 3-1/2" 6 / 1/4-20 Cast Aluminum Grey E1   
Olympic / OMG PC / PET Series 9"   7-1/2" 3-3/4" 6 / 1/4-20 PC / PET [PVC] Black    
Plastic Oddities PWC900 Series 8-3/4" 8-1/4"  6-1/2" [holes not slots] 4-1/2" [holes not slots] 4 PVC Black    
Sioux Chief 867 [2-4"] 8" 7-1/2" 6-1/4" [holes not slots] 4-1/4" [holes not slots] 4 / 1/4-20 PVC Grey 867 Series  
Sioux Chief 868 [6"] 10-1/8" 9-3/4" 8" 5-5/8" 4 / 1/4-20 Metal Black  H990  
Smith 1002 Universal Ring 13-1/2" [12-1/2" outside gravel stop] 12" 9-1/2" [slot is 2" long, 9-1/2" is slot's center] 6-1/2" 4 / 5/16-18 Cast Iron Mustard Yellow  35400  
Smith 1010 14" [12-1/2" outside gravel stop] 12-1/4" 10-1/2" 7-1/2" 4 / 5/16-18 Cast Iron Mustard Yellow  3260JR117 Older rings do not have a lip and measure 12-1/2" O.D. 
Smith 1010XL 18-1/2" [16-1/2" outside gravel stop] 16" N/A 8-1/2" 5 / 5/16-18 Cast Iron Mustard Yellow  8747 Older rings do not have a lip and measure 16-1/2" O.D. 
Smith 1310 10-7/8" [10-1/2" outside gravel stop] 10" 8-1/4" 6" 4 / 5/16-18 Cast Iron Mustard Yellow  04016 JA87 Older rings do not have a lip and measure 10-1/2" O.D. 
Smith 1330 7-3/4" [7-1/2" outside gravel stop] 6-3/4" N/A 4-1/2" 3 / 5/16-18 Cast Iron Mustard Yellow  04015 JR630 Older rings do not have a lip and measure 7-1/2" O.D. 
Smith 101-H PVC [2-4"] 8" 7-1/2" 5-1/2" [holes not slots] 4" [holes not slots] 4 / 5/16-18 PVC Grey   Drains or parts are no longer made by Smith.
Smith 101-H PVC [6-8"] 13-1/4" 12-3/4" 10-3/4" [holes not slots] 9-1/2" [holes not slots] 4 / 5/16-18 PVC Grey   Drains or parts are no longer made by Smith.
Thunderbird RD 2, 3 or 4NH 12-1/2" 11-1/4" 9" 4-1/2"  4 Ring is PVC, Drain is Copper Black    
Wade 3000 / 3500 [Old #3100] 11-1/2" 10-3/4" 8" [slots are 1-1/8" long, 8" is center] 5-1/2"  4 / 3/8-16 Cast Iron Red W-3500-FRG [Old #W-3100-FRG]   
Wade 3101 14" 13" 9-1/2" [slots are 1-1/8" long, 9-1/2" is center] 6-3/4"  4 / 3/8-16 [uses 'L' or 'eye' bolts] Cast Iron Red W-3101-FRG  The Zurn Z100 Dome fits this ring. 
Wade 3108 15-1/4" 14-1/4" 11-1/2" 8-1/4"  4 / 3/8-16 [older styles use 'L' or 'eye' bolts] Cast Iron Red W-3108-FRG   
Wade 3200 9" 7-1/2" N/A 5-1/2"  3 / 3/8-16 [older styles use 'L' or 'eye' bolts] Cast Iron Red W-3200-FRG  Casting # not usually stamped on ring.
Watts / Ancon RD100 / B2-FLG 14" 12-1/2" N/A 7-7/8"  3 / 1/4-20 Cast Iron Grey B2-FLG   
Watts / Ancon RD200 / B3-FLG 9-1/4" 7-1/2" N/A 4-7/8"  3 / 1/4-20 Cast Iron Grey B3-FLG   
Watts / Ancon RD300 / B15-FLG 15-1/2" 12-1/2" 13-7/8" [closed bolt holes are outside the gravel stop] 9-7/8" [closed bolt holes are outside of the gravel stop]  4 / 3/8-16 Cast Iron Grey B15-FLG  Ring has closed bolt holes that are outside of the gravel stop.
Zurn Z100 13-3/4" [13" outside gravel stop] 12-1/2" 9-1/2" 6-3/4"  4 / 3/8-16 Cast Iron Blue 29480 Outside of gravel stop is 13". 
Zurn Z101 19" [18-3/4" outside gravel stop] 18-1/4" N/A 9-1/2"  5 / 3/8-20 Cast Iron Blue 61209-001  Outside of gravel stop is 18-3/4". 
Zurn Z121 11-1/4" [10-3/4" outside gravel stop] 10-1/4"  8" 5-1/2" 4 / 3/8-16 Cast Iron Blue 56588-001  Outside of gravel stop is 10-3/4".
Zurn Z125 8-1/2" [8" outside gravel stop] 7-3/4" 6" 4-1/4"  4 / 3/8-16 Cast Iron Blue 56585 Outside of gravel stop is 8". 
Zurn - Light Duty Commercial  RD2190 Universal Ring 13-3/4" [13" outside gravel stop] 12-1/2"  9" [slot is 1-7/8" long, 9" is center] 6-1/4" 4 / 3/8-16 Cast Iron Blue 56932  Outside of gravel stop is 13".