
Type B Gas Vent
Type B Gas Vent Systems Give You These Important Advantages
Safety of the Hart & Cooley® system is assured by the double-wall, air-insulated design and locking joints. Properly installed, the vent cannot come apart through vibration, and offers protection against vent failure or fire hazard. Type B Gas Vent is designed for negative pressure applications and flue gas temperatures not exceeding 400°F above ambient for Category I appliances.
Durability is the result of high-quality materials and workmanship, with galvanized outer pipe and aluminum inner pipe providing protection against corrosion and external damage.
Simple installation is achieved with a complete line of adjustable fittings and various lengths of pipe. Curled ends lock together for stability and easy assembly. A full set of installation instructions are supplied with all caps and supports.
Underwriter Laboratories Standard No. UL 441 and bears the Mark.
B-Vent Features
- 3” to 12” inner and outer pipe curled together as an integral unit.
- 14” - 30” sizes have a snap-lock coupling system.
- Unique locking band provides 360° turning radius of the pipe and fittings.
- Locking band slides over tabs easily, locks firmly without twisting. Locking tabs hold pipe securely together, can be easily unlocked.
- Reinforced ends– curled bead on end of outer pipe for rigidity and strength.
- Deep Locking Groove assures solid joint and secure lock.
- Corrosion-resistant aluminum inner wall for rapid warm-up.
- Galvanized steel outer pipe for maximum protection.
- Positive Stop—provides proper alignment and positive fit for mating end of pipe or fitting

- Lock-Ring style connection.
- 3" to 12" pipe and fitting couplers overlap 1-3/8" when joined together; therefore, assembled length is 1-3/8" less than listed length.
- The allowable minimum clearance to combustibles is 1"
- Outside Diameter (OD) Sizes 3" through 6" is size plus 1/2". Sizes 7" through 12" is size plus 1"
- A full set of installation instructions are supplied with caps and supports.
Round Pipe (sizes 3-12)
Diameter (3" to 12") | ||||||||
---|---|---|---|---|---|---|---|---|
Length (6" to 5') | 3" | 4" | 5" | 6" | 7" | 8" | 10" | 12" |
6" | 3RP6 | 4RP6 | 5RP6 | 6RP6 | ||||
12" | 3RP12 | 4RP12 | 5RP12 | 6RP12 | 7RP12 | 8RP12 | ||
18" | 3RP18 | 4RP18 | 5RP18 | 6RP18 | 7RP18 | 8RP18 | 10RP18 | 12RP18 |
24" | 3RP24 | 4RP24 | 5RP24 | 6RP24 | 7RP24 | 8RP24 | 10RP24 | 12RP24 |
3' | 3RP3 | 4RP3 | 5RP3 | 6RP3 | 7RP3 | 8RP3 | 10RP3 | 12RP3 |
4' | 3RP4 | 4RP4 | 5RP4 | 6RP4 | 7RP4 | 8RP4 | ||
5' | 3RP5 | 4RP5 | 5RP5 | 6RP5 | 7RP5 | 8RP5 | 10RP5 |

- 14" to 30" pipe and fitting couplers overlap 1" when joined together; therefore, assembled length is 1" less than listed length.
- Snap-lock style
- Outside Diameter (OD) Sizes 14" through 30" is size plus 1"
- A full set of installation instructions are supplied with caps and supports.
Round Pipe sizes 14"-30"
Listed Length | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Diameter | 14" | 16" | 18" | 20" | 22" | 24" | 26" | 28" | 30" | |
3' | 14R3 | 16R3 | 18R3 | 20R3 | 22R3 | 24R3 | 26R3 | 28R3 | 30R3 | |
24" | 14R24 | 16R24 | 18R24 | 20R24 | 22R24 | 24R24 | 26R24 | 28R24 | 30R24 | |
18" | 14R18 | 16R18 | 18R18 | 20R18 | 22R18 | 24R18 | 26R18 | 28R18 | 30R18 | |
12" | 14R12 | 16R12 | 18R12 | 20R12 | 22R12 | 24R12 | 26R12 | 28R12 | 30R12 |

Adjustable Length Pipe dimensions (inches)
Model | Size | Listed Length* |
---|---|---|
3RPA | 3" | 12" |
4RPA | 4" | 12" |
5RPA | 5" | 12" |
6RPA | 6" | 12" |
7RPA | 7" | 18" |
8RPA | 8" | 18" |
10RPA | 10" | 18" |
12RPA | 12" | 18" |
14R18A | 14" | 18" |
16R18A | 16" | 18" |
18R18A | 18" | 18" |
20R18A | 20" | 18" |
22R18A | 22" | 18" |
24R18A | 24" | 18" |
26R18A | 26" | 18" |
28R18A | 28" | 18" |
30R18A | 30" | 18" |
* Overlap: Minimum 1". Maximum overlap on a 12" length is 10". Maximum overlap on an 18" length is 16".

Tee dimensions (inches)
Model | Size | Dim. A | Dim. B | Dim. C | Dim. D |
---|---|---|---|---|---|
3RT3 | 3" x 3" x 3" | 7 1/2" | 4 1/2" | 6 1/4" | 4 1/2" |
4RT4 | 4" x 4" x 4" | 8 1/2" | 5" | 7 1/4" | 5" |
5RT5 | 5" x 5" x 5" | 9 1/2" | 5 1/2" | 8 1/4" | 5 1/2" |
5RT4 | 5" x 5" x 4" | 9 1/2" | 5 1/2" | 8 1/4" | 5 1/2" |
5RT3 | 5" x 5" x 3" | 9 1/2" | 5 1/2" | 8 1/4" | 5 1/2" |
6RT6 | 6" x 6" x 6" | 10 1/2" | 6" | 9 1/4" | 6" |
6RT4 | 6" x 6" x 4" | 10 1/2" | 6" | 9 1/4" | 6" |
6RT3 | 6" x 6" x 3" | 10 1/2" | 6" | 9 1/4" | 6" |
7RT7 | 7" x 7" x 7" | 11 1/2" | 6 1/2" | 10 3/4" | 6 3/4" |
8RT8 | 8" x 8" x 8" | 12 1/2" | 7" | 11 3/4" | 7 1/4" |
10RT10 | 10" x 10" x 10" | 14 1/2" | 8" | 13 3/4" | 8 1/4" |
12RT12 | 12" x 12" x 12" | 16 1/2" | 9" | 15 3/4" | 9 1/4" |
14RT | 14" x 14" x 14" | 24" | 11 3/4" | 19 1/4" | 12 |
16RT | 16" x 16" x 16" | 26" | 13" | 21 1/2" | 131/4" |
18RT | 18" x 18" x 18" | 28 1/2" | 14 1/4" | 23 3/4" | 14 1/2" |
20RT | 20" x 20" x 20" | 30" | 15 1/2" | 26 | 15 3/4" |
22RT | 22" x 22" x 22" | 33" | 16 3/4" | 28 1/4" | 17" |
24RT | 24" x 24" x 24" | 36" | 18" | 30 1/2" | 18 1/4" |
26RT | 26" x 26" x 26" | 38" | 19" | 32 1/2" | 19 1/4" |
28RT | 28" x 28" x 28" | 40" | 20" | 34 1/2" | 20 1/4" |
30RT | 30" x 30" x 30" | 42" | 21" | 36 1/2" | 21 1/4" |
Note: Dimension A is installed length

Wye dimensions (inches)
Model | Size X | Y | Z |
---|---|---|---|
4RYF33 | 4" | 3" | 3" |
4RYF44 | 4" | 4" | 4" |
4RYF43 | 4" | 4" | 3" |
5RYF53 | 5" | 5" | 3" |
5RYF54 | 5" | 5" | 4" |
5RYF43 | 5" | 4" | 3" |
5RYF44 | 5" | 4" | 4" |
6RYF54 | 6" | 5" | 4" |
6RYF53 | 6" | 5" | 3" |
6RYF43 | 6" | 4" | 3" |
6RYF44 | 6" | 4" | 4" |
6RYF63 | 6" | 6" | 3" |
6RYF64 | 6" | 6" | 4" |

0-90° Adjustable Elbow dimensions (inches)
Model | Size | Dim. A | Dim. B | Dim. C |
---|---|---|---|---|
3REA90 | 3" | 5 1/2" | 3 3/4" | 7 1/4" |
4REA90 | 4" | 6" | 4 1/4" | 8 1/4" |
5REA90 | 5" | 6 1/2" | 4 3/4" | 9 1/4" |
6REA90 | 6" | 7" | 5 1/4" | 10 1/4" |
7REA90 | 7" | 7 3/4" | 6" | 11 3/4" |
8REA90 | 8" | 8 1/4" | 6 1/2" | 12 3/4" |

60/45-degree Adjustable Elbow dimensions (inches)
Model | Size | I.D. (A) | O.D. (B) | (C) | (D) |
---|---|---|---|---|---|
3REA60 | 3" | 3" | 3 1/2" | 1 7/8" | 5 1/4" |
4REA60 | 4" | 4" | 4 1/2" | 2 1/8" | 5 1/2" |
5REA60 | 5" | 5" | 5 1/2" | 2 1/4" | 6" |
6REA60 | 6" | 6" | 6 1/2" | 2 5/8" | 6 3/8" |

45-degree Adjustable Elbow dimensions (inches)
Model | Size | Dim. A | Dim. B | Dim. C | Dim. D |
---|---|---|---|---|---|
7REA45 | 7" | 4 3/8" | 5/8" | 10 3/8" | 4 3/4" |
8REA45 | 8" | 4 5/8" | 2 7/8" | 11 1/8" | 4 3/4" |
10REA45 | 10" | 5" | 3 1/4" | 12 3/4" | 4 3/4" |
12REA45 | 12" | 51/2" | 33/4" | 13 3/4" | 4 |

- 14" elbow is adjustable.
- 16" through 30" elbows are fixed.
45° Elbow Dimensions (inches)
Model | Size | Dim. A | Dim. B = |
---|---|---|---|
14R45 | 14" | 6 5/8" | 6 1/2" |
16R45 | 16" | 7" | 7" |
18R45 | 18" | 7 9/16" | 7 1/2" |
20R45 | 20" | 8 1/2" | 8 5/8" |
22R45 | 22" | 8" | 7 5/8" |
24R45 | 24" | 8 5/8" | 8 5/16" |
26R45 | 26" | 9" | 9" |
28R45 | 28" | 9 1/2" | 9 1/2" |
30R45 | 30" | 10" | 10" |

Increaser dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
3RN4 | 3" to 4" | 3 3/4" | 5 1/4" |
3RN5 | 3" to 5" | 3 3/4" | 5 1/4" |
3RN6 | 3" to 6" | 3 3/4" | 5 1/4" |
3RN7 | 3" to 7" | 3 3/4" | 5 1/4" |
4RN5 | 4" to 5" | 3 3/4" | 5 1/4" |
4RN6 | 4" to 6" | 3 3/4" | 5 1/4" |
4RN7 | 4" to 7" | 3 3/4" | 5 1/4" |
5RN6 | 5" to 6" | 3 3/4" | 5 1/4" |
6RN7 | 6" to 7" | 3 3/4" | 5 1/4" |
6RN8 | 6" to 8" | 3 3/4" | 5 1/4" |
7RN8 | 7" to 8" | 3 7/8" | 5 3/8" |
8RN10 | 8" to 10" | 3 7/8" | 5 3/8" |
8RN12 | 8" to 12" | 3 7/8" | 5 3/8" |
10RN12 | 10" to 12" | 3 7/8" | 5 3/8" |

Increaser sizes (inches)
Model | Diameter Size |
---|---|
14RIX16 | 14" to 16" |
14RIX18 | 14" to 18" |
16RIX18 | 16" to 18" |
14RIX20 | 14" to 20" |
16RIX20 | 16" to 20" |
18RIX20 | 18" to 20" |
14RIX22 | 14" to 22" |
16RIX22 | 16" to 22" |
18RIX22 | 18" to 22" |
20RIX22 | 20" to 22" |
16RIX24 | 16" to 24" |
18RIX24 | 18" to 24" |
20RIX24 | 20" to 24" |
22RIX24 | 22" to 24" |
18RIX26 | 18" to 26" |
20RIX26 | 20" to 26" |
22RIX26 | 22" to 26" |
24RIX26 | 24" to 26" |
20RIX28 | 20" to 28" |
22RIX28 | 22" to 28" |
24RIX28 | 24" to 28" |
26RIX28 | 26" to 28" |
22RIX30 | 22" to 30" |
24RIX30 | 24" to 30" |
26RIX30 | 26" to 30" |
28RIX30 | 28" to 30" |

- Adapts and increases from locking ring style, small-diameter vent pipe to new snap-lock large-diameter vent pipe.
Universal Increaser/Adapter sizes (inches)
Model | Diameter Size |
---|---|
8RIX14U | 8" to 14" |
10RIX14U | 10" to 14" |
10RIX16U | 10" to 16" |
10RIX18U | 10" to 18" |
12RIX14U | 12" to 14" |
12RIX16U | 12" to 16" |
12RIX18U | 12" to 18" |
12RIX20U | 12" to 20" |

- Prevents rain and debris from entering the vent.
- External screen prevents entry of birds.
3-8" Rain Cap
Model | Size | Dim. A | Dim. B |
---|---|---|---|
3RHW | 3" | 6" | 3 1/4" |
4RHW | 4" | 8" | 4 1/4" |
5RHW | 5" | 10" | 5 1/4" |
6RHW | 6" | 12" | 6 1/4" |
7RHW | 7" | 14" | 7 1/2" |
8RHW | 8" | 16" | 8 1/2" |

- 3" through 6"
- Prevents rain & debris from entering the vent
- Two Locking Tabs ensure a secure connection even in high wind environments
- Used in high wind conditions without sacrificing draft and safety or risking pilot light blow out
High Wind Cap (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
3RWW | 3" | 8" | 5 1/2" |
4RWW | 4" | 10" | 6" |
5RWW | 5" | 12" | 7" |
6RWW | 6" | 14" | 7 1/2" |

- Barriers provided in cap opening spaced less than 1" are designed to resist entry of birds.
- Snap-locks onto pipe.
Metal Cap dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
14C | 14" | 22" | 11" |
16C | 16" | 25" | 12" |
18C | 18" | 28 1/4" | 13 1/2" |
20C | 20" | 31 1/2" | 15" |
22C | 22" | 34 1/2" | 16 1/2" |
24C | 24" | 37 3/4" | 18" |
26C | 26" | 42" | 19 1/2" |
28C | 28" | 44" | 21" |
30C | 30" | 48" | 22 1/2" |

- Barriers provided in cap opening spaced less than 1" are designed to resist entry of birds.
- Slips into most B Vent.
Universal Cap dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
10CU | 10" | 15-3/4" | 7-1/2" |
12CU | 12" | 19" | 9" |
14CU | 14" | 22" | 11" |
16CU | 16" | 25" | 12" |
18CU | 18" | 28 1/4" | 13 1/2" |
20CU | 20" | 31 1/2" | 15" |
22CU | 22" | 34 1/2" | 16 1/2" |
24CU | 24" | 37 3/4" | 18" |
26CU | 26" | 42" | 19 1/2" |
28CU | 28" | 44" | 21" |
30CU | 30" | 48" | 22 1/2" |

- Adapts Hart & Cooley vent to other brands of B vent (theirs to ours).
Male Adapter dimensions (inches)
Model | Size | I.D. A | Dim. B |
---|---|---|---|
3RA | 3" | 3 9/16 | 6 |
4RA | 4" | 4 9/16 | 6 |
5RA | 5" | 5 9/16 | 6 |
6RA | 6" | 6 9/16 | 6 |
7RA | 7" | 7 9/16 | 17 3/4 |
8RA | 8" | 8 9/16 | 17 3/4 |

- Adapts thicker wall brands of B vent to Hart&Cooley vent (theirs to ours).
Male Adapter dimensions (inches)
Model | Size | I.D. A | Dim. B |
---|---|---|---|
3RAA | 3 | 3 11/16 | 6 |
4RAA | 4 | 4 11/16 | 6 |
5RAA | 5 | 5 11/16 | 6 |
6RAA | 6 | 6 11/16 | 6 |
7RAA | 7 | 7 11/16 | 8 1/2 |
8RAA | 8 | 8 11/16 | 8 1/2 |
Competitive Manufacturer dimensions (inches)
Manufacturer | Pipe Diameter | Airspace | Adapter Male | Adapter Female |
---|---|---|---|---|
Selkirk | 3 - 6 | 1/4 | RA or RPA* | RRA |
Selkirk | 7 - 8 | 1/4 | RA | - |
Metal Fab | 3 - 6 | 1/4 | RA or RPA | *RRA |
Metal Fab | 7 - 8 | 1/2 | RPA | - |
AmeriVent | 3 - 6 | 1/4 | RA or RPA* | RRA |
AmeriVent | 7 - 8 | 1/2 | RPA | - |
Air-Jet | 3 - 6 | 3/8 | RAA | - |
Air-Jet | 7 - 8 | 3/8 | RAA | - |
DuraVent | 3 - 6 | 5/16 | RAA | RRA |
DuraVent | 7 - 8 | 5/16 | RAA | - |

- Adapts Hart & Cooley vent to other brands of B vent (ours to theirs).
Female Adapter dimensions (inches)
Model | Size | I.D. (A) | (B) |
---|---|---|---|
3RRA | 3" | 3 3/4" | 6" |
4RRA | 4" | 4 3/4" | 6" |
5RRA | 5" | 5 3/4" | 6" |
6RRA | 6" | 6 3/4" | 6" |

Draft Hood Connector sizes (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
3RDH | 3" | 4 1/2" | 6" |
4RDH | 4" | 4 1/2" | 6" |
5RDH | 5" | 4 1/2" | 6" |
6RDH | 6" | 4 1/2" | 6" |
7RDH | 7" | 7" | 8 1/2" |
8RDH | 8" | 7" | 8 1/2" |
10RDH | 10" | 7" | 8 1/2" |
12RDH | 12" | 7" | 8 1/2" |

Adjustable Roof Flashing dimensions Flat€“6/12 (inches)
Model | Size | Dim. A | Dim. B | Dim. C |
---|---|---|---|---|
3RF | 3" | 4" | 6 1/8" | 4 1/8" |
4RF | 4" | 3 1/4" | 7 3/8" | 4 1/8" |
5RF | 5" | 3 1/2" | 8 5/8" | 4 3/4" |
6RF | 6" | 3 3/4" | 10" | 5 1/4" |
7RF | 7" | 4" | 11 1/8" | 6 3/8" |
8RF | 8" | 4 1/4" | 13 1/8" | 6 3/4" |
10RF | 10" | 4 3/4" | 15 5/8" | 7 1/2" |
12RF | 12" | 4 3/4" | 18" | 8" |
14RF | 14" | 5 1/4" | 21" | 9 1/2" |
16RF | 16" | 5 1/4" | 23 1/4" | 9 1/2" |
18RF | 18" | 5 3/4" | 25 7/8" | 10 1/2" |
20RF | 20" | 5 3/4" | 28 1/8" | 11" |
22RF | 22" | 6 1/4" | 30 5/8" | 12" |
24RF | 24" | 6 1/4" | 32 7/8" | 12 1/2" |
26F | 26" | NA | NA | 12" |
28F | 28" | NA | NA | 12" |
30F | 30" | NA | NA | 13" |
NA = Not Available

- Available in 3" through 8".
Adjustable Roof Flashing dimensions 6/12-12/12 (inches)
Model | Size | Dim. A | Dim. B | Dim. C |
---|---|---|---|---|
3RFA | 3" | 5 1/2" | 6" | 7 1/4" |
4RFA | 4" | 5 3/8" | 7 3/8" | 7 9/16" |
5RFA | 5" | 5 5/8" | 8 5/8" | 8 5/8" |
6RFA | 6" | 5 3/8" | 10" | 8 13/16" |
7RFA | 7" | 5 3/8" | 11 7/8" | 9 3/4" |
8RFA | 8" | 5 1/4" | 13" | 10 1/16" |

Tall Cone Roof Flashing dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
3RTF | 3" | 11" | 7 1/2" |
4RTF | 4" | 11" | 7 1/2" |
5RTF | 5" | 11" | 7 1/2" |
6RTF | 6" | 11" | 7 1/2" |
7RTF | 7" | 11" | 11" |
8RTF | 8" | 11" | 11" |
10RTF | 10" | 11" | 16' |
12RTF | 12" | 11" | 16" |
14RTF | 14" | 11" | 19 1/4" |
16RTF | 16" | 11" | 19 1/4" |
18RTF | 18" | 11" | 23 5/8" |
20RTF | 20" | 11" | 23 5/8" |
22RTF | 22" | 11" | 27 5/8" |
24RTF | 24" | 11" | 27 5/8" |
26FT | 26" | 11" | 31 9/16" |
28FT | 28" | 11" | 31 9/16" |
30FT | 30" | 11" | 31 9/16" |

- Supports 20 feet of pipe.
- Acts as a firestop.
3"-8" Firestop Support
Model | Size | Dim A | Dim B | Dim C | Dim D |
---|---|---|---|---|---|
3FSP | 3" | 3-5/8" | 7-1/2" | 3-1/2" | 5-1/2" |
4FSP | 4" | 4-5/8" | 8-1/2" | 4-1/2" | 6-1/2" |
5FSP | 5" | 5-5/8" | 9-1/2" | 5-1/2" | 7-1/2" |
6FSP | 6" | 6-5/8" | 10-1/2" | 6-1/2" | 8-1/2" |
7FSP | 7" | 8-1/8" | 12" | 8" | 10" |
8FSP | 8" | 9-1/8" | 13" | 9" | 11" |

- Supports 30 feet of pipe.
- Acts as a firestop.
- 7", 8" and 10" not UL-listed.
Gripper Support dimensions 3"-6" (inches)
Model | Size | Dim. A | Dim. B | Dim. C Square |
---|---|---|---|---|
3RGS | 3" | 3 1/2" | 5 1/2" | 9" |
4RGS | 4" | 4 1/2" | 6 1/2" | 10" |
5RGS | 5" | 5 1/2" | 7 1/2" | 11" |
6RGS | 6" | 6 1/2" | 8 1/2" | 12" |
7RGS | 7" | 7 1/2" | - | 13" |
8RGS | 8" | 8 1/2" | - | 14" |
10RGS | 10" | 10 1/2" | - | 16" |

- Supports 30 feet of pipe.
Support Plate dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
10SP | 10" | 18" | 10 5/8" |
12SP | 12" | 20" | 12 5/8" |
14SP | 14" | 22" | 14 5/8" |
16SP | 16" | 24" | 16 5/8" |
18SP | 18" | 26" | 18 5/8" |
20SP | 20" | 28" | 20 5/8" |
22SP | 22" | 30" | 22 5/8" |
24SP | 24" | 32" | 24 5/8" |
26SP | 26" | 34" | 26 5/8" |
28SP | 28" | 36" | 28 5/8" |
30SP | 30" | 38" | 30 5/8" |

- To cover a rough opening.
Pipe Collar dimensions 3"-8" (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
3RPC | 3" | 3 5/8" | 8 3/4" |
4RPC | 4" | 4 5/8" | 8 3/4" |
5RPC | 5" | 5 5/8" | 10 7/8" |
6RPC | 6" | 6 5/8" | 12 7/8" |
7RPC | 7" | 8 1/8" | 14 7/8" |
8RPC | 8" | 9 1/8" | 16 7/8" |

Tee Cap dimensions (inches)
Model | Diameter |
---|---|
3RTC | 3" |
4RTC | 4" |
5RTC | 5" |
6RTC | 6" |
7RTC | 7" |
8RTC | 8" |
10RTC | 10" |
12RTC | 12" |
14RTCP | 14" |
16RTCP | 16" |
18RTCP | 18" |
20RTCP | 20" |
22RTCP | 22" |
24RTCP | 24" |
26RTCP | 26" |
28RTCP | 28" |
30RTCP | 30" |

- Available in 3" through 12".
- 8" through 12" bracket used with perforated pipe strap supplied by others.
Wall Bracket dimensions (inches)
Model | Size | Dim. A | Dim. B | Dim. C |
---|---|---|---|---|
3RWB | 3" | 3" | 3 1/2" | 3 1/4" |
4RWB | 4" | 4" | 4 1/2" | 3 3/4" |
5RWB | 5" | 5" | 5 1/2" | 4 1/4" |
6RWB | 6" | 6" | 6 1/2" | 4 3/4" |
7RWB | 7" | 7" | 8" | 5 1/2" |
8RWB | 8" | 8" | - | - |
10RWB | 10" | 10" | - | - |
12RWB | 12" | 12" | - | - |

- Provides necessary clearance to combustibles.
- Sleeve is adjustable from 3" to 6".
Wall Thimble dimensions (inches)
Model | Size | Dim. A | Dim. B | Dim. C |
---|---|---|---|---|
3RWT | 3" | 5 1/2" | 3 1/16" | 3 9/16" |
4RWT | 4" | 6 1/2" | 3 1/16" | 4 9/16" |
5RWT | 5" | 7 1/2" | 3 1/16" | 5 9/16" |
6RWT | 6" | 8 1/2" | 3 1/4" | 6 9/16" |
7RWT | 7" | 10" | 3 1/4" | 8 1/16" |
8RWT | 8" | 11" | 3 1/4" | 9 1/16" |

3-6" Storm Collar dimensions (inches)
Model | Size | (A) | (B) |
---|---|---|---|
3RS | 3" | 3 1/2" | 6 5/8" |
4RS | 4" | 4 1/2" | 7 5/8" |
5RS | 5" | 5 1/2" | 8 5/8" |
6RS | 6" | 6 1/2" | 9 5/8" |
7€“12" Adjustable Storm Collar dimensions (inches)
Model | Size | (A) | (B) |
---|---|---|---|
7RS | 7" | 8" | 10 7/8" |
8RS | 8" | 9" | 11 7/8" |
10RS | 10" | 11" | 14 1/2" |
12RS | 12" | 13" | 16 1/2" |

- Designed to be snug around vent pipe for a weather-tight fit.
- For use with roof flashing and caulk.
14“-30" Adjustable Storm Collar dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
14SC | 14" | 15" | 18 7/8" |
16SC | 16" | 17" | 21 1/4" |
18SC | 18" | 19" | 23 1/4" |
20SC | 20" | 21" | 25 15/16" |
22SC | 22" | 23" | 28 5/16" |
24SC | 24" | 25" | 30 11/16" |
26SC | 26" | 27" | 33 1/16" |
28SC | 28" | 29" | 35 1/16" |
30SC | 30" | 31" | 37 1/16" |

- Single-wall flexible construction.
- Includes an integral appliance draft hood connector for fast installation.
- Locks onto Hart & Cooley Type B gas vent.
- Requires only 1" clearance to combustibles per installation instructions.
- UL-listed for use as a connection from an appliance to Type B gas vent in conditioned spaces only. Do not enclose.
- Available in 3" through 5" diameters and 1' through 5' lengths.
Flexible Gas Vent Connector sizes (inches)
Size | Model | Length |
---|---|---|
3 | 3SFC12 | 12" |
3 | 3SFC24 | 24" |
3 | 3SFC3 | 36" |
3 | 3SFC4 | 48" |
3 | 3SFC5 | 60" |
3 | 4SFC12 | 12" |
4 | 4SFC24 | 24" |
4 | 4SFC3 | 36" |
4 | 4SFC4 | 48" |
4 | 4SFC5 | 60" |
5 | 5SFC12 | 12" |
5 | 5SFC24 | 24" |
5 | 5SFC3 | 36" |
5 | 5SFC4 | 48" |
5 | 5SFC5 | 60" |

- Features double-wall, air-insulated construction.
- Has Type B male/female ends for easy connection with Hart & Cooley vent.
- Requires only 1" clearance to combustibles.
- UL-listed for use as a connection from an appliance to Type B gas vent and as a segment of Type B gas vent.
- Can be used in unconditioned spaces, such as attics and crawl spaces. Do not enclose.
- Available in 3" through 5" diameters and 2' through 5' lengths.
3" Vent Lengths (inches)
Model | Length |
---|---|
3DFC24 | 24 |
3DFC3 | 36 |
3DFC4 | 48 |
3DFC5 | 60 |
4" Vent Lengths (inches)
Model | Length |
---|---|
4DFC24 | 24 |
4DFC3 | 36 |
4DFC4 | 48 |
4DFC5 | 60 |

Convenient solution for a variety of rooftop vent, flue*, and B-vent installations
- Self-centering, adjustable design means a quick, easy installation
- Worm Gear Clamp with one-tool adjustability
- Three sizes fit pipes with outside diameters from 3” to 8.5”
- Helps prevent rain, debris, and most birds from entering the vent
- Aluminum construction for rust and corrosion resistance
- Includes separate instruction sheet
- Listings: UL 441 and CAN/ULC-605
*Not to be used with solid fuel

- 5" Oval to Round Adapter, 50A5RA.
5" Cap dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
5ECW | 5" | 9 7/8" | 5 5/16" |

4" Oval Cap dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
OC | 4" | 5 3/8" x 8 1/2" | 3 1/2" |

- Offers all the advantages of round pipe, and may be used for the following types of installation.
4" Oval:
- Conventional Type B
- Type B-2x4 when used with firestop
- Type BW-2x4 with recessed heater
5" Oval:
- Type B
- Type B-2x4
Type B
Sizes 4" and 5" may be installed with 1' minimum clearance to combustibles.
Type BW
Four-inch oval vent (when installed in 2x4 stud wall with recessed heater) requires clearances as determined by use of 4OBPWS hold-down plate, 4OCP ceiling plate spacers, and 4OFS firestop spacers.
Type B 2x4
Four and five inch oval vent (when installed in 2 x 4 stud wall, not using a recessed heater) requires clearance as determined by use of 4OFS or 5OFS firestop spacers at each ceiling level.
Available Oval Pipe Lengths (inches)
6 | 12 | 18 | 24 | 36 | 48 | 60 | |
---|---|---|---|---|---|---|---|
4" oval pipe | • | • | • | • | • | • | • |
5" oval pipe | - | - | • | • | • | • | • |
Oval Pipe dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
4OP__* | 4" | 7 1/16 | 2 7/8 |
5OP__* | 5" | 10 3/4 | 2 7/8 |
* Add length to complete Model Number.

- The flat 45° elbow is used in pairs where offsets are desired in 1" minimum clearance enclosures or open spaces, such as attics or basements. Add pipe sections between pairs to produce additional offset.
Flat 45° Elbow dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
4OEF45 | 4" | 3 3/4" | 3 3/4" |
5OEF45 | 5" | 4 3/4" | 4 3/4" |

- The standard 45° elbow is used in pairs where offsets are desired in 1" minimum clearance enclosures or open spaces, such as attics or basements. Add pipe sections between pairs to produce additional offset.
Standard 45° Elbow dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
4OES45 | 4" | 3" | 3" |
5OES45 | 5" | 3 1/2" | 3 1/2" |

- Adapts from oval to lock-ring style round.
Oval-to-Round Adapter dimensions (inches)
Model | Size | Dim. A |
---|---|---|
4OAR | 4" | 11 3/8" |

- The oval-to-round adapter is used for conversion of vent from oval to round.
- Requires use of RAA male adapter to continue with round.
Oval-to-Round Adapter dimensions (inches)
Model | Size | Dim. A |
---|---|---|
4OARA | 4" | 6 7/8" |
5OA5RA | 5" | 9 3/8" |

- The round-to-oval adapter is used for conversion of vent from round to oval.
- Requires use of RRA female adapter to come from round.
Round-to-Oval Adapter dimensions (inches)
Model | Size | Dim. A |
---|---|---|
4RAO | 4 | 6 7/8 |
5RA5O | 5 | 9 3/8 |

- The branch size and trunk size have the same effective area. The tee branch accepts either double- or single-wall pipe.
Standard Oval Tee dimensions (inches)
Model | Size | Dim. A | Dim. B | Dim. C |
---|---|---|---|---|
4OT | 4 | 12 | 2 9/16 | 2 3/8 |
5OT | 5 | 12 | 2 9/16 | 2 3/8 |

- The adjustable length telescopes onto standard pipe sections to permit adjustments from 3" to 10".
Adjustable 4-5" Oval Pipe dimensions (inches)
Model | Size |
---|---|
4OPA | 4 |
5OPA | 5 |

- The all-pitch flashing is installed either parallel or perpendicular to the roof ridge, and fits roof pitches flat to 5/12.
Oval Flashing dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
4OF | 4" | 17 7/8" | 13 1/2" |
5OF | 5" | 23" | 14" |

- The storm collar serves as a counter flashing and requires mastic to seal to the vent pipe.
Oval Storm Collar sizes (inches)
Model | Size |
---|---|
4OSC | 4 |
5OSC | 5 |

- The tee cap is used for closing off the bottom of the tee.
Oval Tee Cap sizes (inches)
Model | Size |
---|---|
4OTC | 4 |
5OTC | 5 |

- The tee support is used to support and center the tee. Use with the tee cap shown below.
Tee Support dimensions (inches)
Model | Size | Dim. A | Dim. B |
---|---|---|---|
4OBC | 4" | 3" | 11 1/2" |
5OBC | 5" | 3" | 12 7/8" |

- The Type BW hold-down plate is required for connecting Type BW vent to a wall furnace outlet.
Hold-Down Plate dimensions (inches)
Model | Size | Dim. A | Dim. B | Dim. C |
---|---|---|---|---|
4OBPWS | 4" | 9" | 9 5/8" | 2 5/16" |

- Type BW plate spacers are required at the first ceiling level above a wall furnace to center and space vent properly and to provide the required opening between floors. Firestop spacers must be used at subsequent levels.
Plate Spacer dimensions (inches)
Model | Size | Dim. A |
---|---|---|
4OCP | 4" | 17 1/2" |

- The firestop spacers center vent in 16" O.C. stud space and serve as a firestop at the ceiling level. This is a required component for Type B 2 x 4 and multi-story Type BW installations.
Firestop Spacer dimensions (inches)
Model | Size | Wall |
---|---|---|
4OFS | 4" | 2" x 4" |
5OFS | 5" | 2" x 4" |
4OFS6 | 4" | 2" x 6" |