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". |
