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| Exhaust Systems > Non Insulated Wall/Roof Thimbles |  |
Compact Design Meets NFPA 37 Requirements
FEATURES:
- Meets or Exceeds NFPA 37 Requirements.
- Built-in Pipe Guides Eliminate Hot Spots.
- Designed With Structural Integrity.
- Standard Finish High Heat Black Enamel.
- Heavy Wall Steel Construction.
- Custom Thimbles Available.
- Example: WRT1200P-15-4.0-12 is for a 4 / 12 Pitched Roof
| PIPE / TUBE O.D. | CARBON STEEL | FITS 1" THRU 5" THK. WALL / ROOF |
FITS 6" THRU
10" THK. WALL / ROOF |
FITS 11" THRU 15" THK. WALL / ROOF |
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| A | B | C | D | E | F | L1 | L2 | PART NO. | L1 | L2 | PART NO. | L1 | L2 | PART NO. |
| 1.50" | 14.00 | 20.00 | 0.25 | 16.00 | 1.54 | 23.00 | 14.00 | NIT0150T-5 | 28.00 | 19.00 | NIT0150T-10 | 33.00 | 24.00 | NIT0150T-15 |
| 1.90" | 14.00 | 20.00 | 0.25 | 16.00 | 1.94 | 23.00 | 14.00 | NIT0150P-5 | 28.00 | 19.00 | NIT0150P-10 | 33.00 | 24.00 | NIT0150P-15 |
| 2.00" | 14.00 | 20.00 | 0.25 | 16.00 | 2.04 | 23.00 | 14.00 | NIT0200T-5 | 28.00 | 19.00 | NIT0200T-10 | 33.00 | 24.00 | NIT0200T-15 |
| 2.38" | 16.00 | 22.00 | 0.25 | 18.00 | 2.42 | 23.00 | 14.00 | NIT0200P-5 | 28.00 | 19.00 | NIT0200P-10 | 33.00 | 24.00 | NIT0200P-15 |
| 2.50" | 16.00 | 22.00 | 0.25 | 18.00 | 2.54 | 23.00 | 14.00 | NIT0250T-5 | 28.00 | 19.00 | NIT0250T-10 | 33.00 | 24.00 | NIT0250T-15 |
| 2.88" | 16.00 | 22.00 | 0.25 | 18.00 | 2.92 | 23.00 | 14.00 | NIT0250P-5 | 28.00 | 19.00 | NIT0250P-10 | 33.00 | 24.00 | NIT0250P-15 |
| 3.00" | 16.00 | 22.00 | 0.25 | 18.00 | 3.04 | 23.00 | 14.00 | NIT0300T-5 | 28.00 | 19.00 | NIT0300T-10 | 33.00 | 24.00 | NIT0300T-15 |
| 3.50" | 16.00 | 22.00 | 0.25 | 18.00 | 3.54 | 23.00 | 14.00 | NIT0300P-5 | 28.00 | 19.00 | NIT0300P-10 | 33.00 | 24.00 | NIT0300P-15 |
| 4.00" | 16.00 | 22.00 | 0.25 | 18.00 | 4.04 | 23.00 | 14.00 | NIT0400T-5 | 28.00 | 19.00 | NIT0400T-10 | 33.00 | 24.00 | NIT0400T-15 |
| 4.50" | 18.00 | 24.00 | 0.25 | 20.00 | 4.54 | 23.00 | 14.00 | NIT0400P-5 | 28.00 | 19.00 | NIT0400P-10 | 33.00 | 24.00 | NIT0400P-15 |
| 5.00" | 18.00 | 24.00 | 0.25 | 20.00 | 5.04 | 23.00 | 14.00 | NIT0500T-5 | 28.00 | 19.00 | NIT0500T-10 | 33.00 | 24.00 | NIT0500T-15 |
| 5.56" | 18.00 | 24.00 | 0.25 | 20.00 | 5.62 | 23.00 | 14.00 | NIT0500P-5 | 28.00 | 19.00 | NIT0500P-10 | 33.00 | 24.00 | NIT0500P-15 |
| 6.00" | 18.00 | 24.00 | 0.25 | 20.00 | 6.04 | 23.00 | 14.00 | NIT0600T-5 | 28.00 | 19.00 | NIT0600T-10 | 33.00 | 24.00 | NIT0600T-15 |
| 6.63" | 20.00 | 26.00 | 0.25 | 22.00 | 6.67 | 23.00 | 14.00 | NIT0600P-5 | 28.00 | 19.00 | NIT0600P-10 | 33.00 | 24.00 | NIT0600P-15 |
| 8.00" | 20.00 | 26.00 | 0.25 | 22.00 | 8.06 | 23.00 | 14.00 | NIT0800T-5 | 28.00 | 19.00 | NIT0800T-10 | 33.00 | 24.00 | NT0800T-15 |
| 8.63" | 22.00 | 28.00 | 0.25 | 24.00 | 8.67 | 23.00 | 14.00 | NIT0800P-5 | 28.00 | 19.00 | NIT0800P-10 | 33.00 | 24.00 | NIT0800P-15 |
| 10.00" | 22.00 | 28.00 | 0.25 | 24.00 | 10.06 | 23.00 | 14.00 | NIT1000T-5 | 28.00 | 19.00 | NIT1000T-10 | 33.00 | 24.00 | NIT1000T-15 |
| 10.75" | 24.00 | 30.00 | 0.25 | 26.00 | 10.81 | 23.00 | 14.00 | NIT1000P-5 | 28.00 | 19.00 | NIT1000P-10 | 33.00 | 24.00 | NIT1000P-15 |
| 12.00" | 24.00 | 30.00 | 0.25 | 26.00 | 12.06 | 23.00 | 14.00 | NIT1200T-5 | 28.00 | 19.00 | NIT1200T-10 | 33.00 | 24.00 | NIT1200T-15 |
| 12.75" | 26.00 | 32.00 | 0.25 | 28.00 | 12.81 | 23.00 | 14.00 | NIT1200P-5 | 28.00 | 19.00 | NIT1200P-10 | 33.00 | 24.00 | NIT1200P-15 |
| 14.00" | 26.00 | 32.00 | 0.25 | 28.00 | 14.06 | 23.00 | 14.00 | NIT1400P-5 | 28.00 | 19.00 | NIT1400P-10 | 33.00 | 24.00 | NIT1400P-15 |
| 16.00" | 28.00 | 34.00 | 0.25 | 30.00 | 16.06 | 23.00 | 14.00 | NIT1600P-5 | 28.00 | 19.00 | NIT1600P-10 | 33.00 | 24.00 | NIT1600P-15 |
| 18.00" | 30.00 | 36.00 | 0.25 | 32.00 | 18.06 | 23.00 | 14.00 | NIT1800P-5 | 28.00 | 19.00 | NIT1800P-10 | 33.00 | 24.00 | NIT1800P-15 |
| 20.00" | 32.00 | 38.00 | 0.25 | 34.00 | 20.06 | 23.00 | 14.00 | NIT2000P-5 | 28.00 | 19.00 | NIT2000P-10 | 33.00 | 24.00 | NIT2000P-15 |
| 22.00" | 34.00 | 40.00 | 0.25 | 36.00 | 22.06 | 23.00 | 14.00 | NIT2200P-5 | 28.00 | 19.00 | NIT2200P-10 | 33.00 | 24.00 | NIT2200P-15 |
| 24.00" | 36.00 | 42.00 | 0.25 | 38.00 | 24.06 | 23.00 | 14.00 | NIT2400P-5 | 28.00 | 19.00 | NIT2400P-10 | 33.00 | 24.00 | NIT2400P-15 |
| ADD TO L1 FOR PITCHED ROOF DESIGN | ||||||||||||||
| PITCH | OUTSIDE CASE DIAMETER (INSULATED OR NON-INSULATED) | |||||||||||||
| 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 34 | |
| 0.5 - 12 | .42 | .50 | .60 | .67 | .75 | .83 | .92 | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.4 | 1.5 |
| 1.0 - 12 | .83 | 1.0 | 1.2 | 1.4 | 1.5 | 1.7 | 1.8 | 2.0 | 2.2 | 2.3 | 2.5 | 2.7 | 2.8 | 3.0 |
| 1.5 - 12 | 1.3 | 1.5 | 1.8 | 2.0 | 2.3 | 2.5 | 2.8 | 3.0 | 3.3 | 3.5 | 3.8 | 4.0 | 4.3 | 4.5 |
| 2.0 - 12 | 1.7 | 2.0 | 2.3 | 2.7 | 3.0 | 3.3 | 3.7 | 4.0 | 4.3 | 4.7 | 5.0 | 5.3 | 5.7 | 6.0 |
| 3.0 - 12 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | 9.0 |
| 4.0 - 12 | 3.3 | 4.0 | 4.7 | 5.3 | 6.0 | 6.7 | 7.3 | 8.0 | 8.7 | 9.3 | 10.0 | 10.7 | 11.3 | 12.0 |
| 5.0 - 12 | 4.2 | 5.0 | 5.8 | 6.7 | 7.5 | 8.3 | 9.2 | 10.0 | 10.8 | 11.7 | 12.5 | 13.3 | 14.2 | 15.0 |
| 6.0 - 12 | 5.0 | 6.0 | 7.0 | 8.0 | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 16.0 | 18.0 | 20.0 |
