| Product Type: | Straight Pipe |
|---|---|
| Length (Inches): | 48" |
| Diameter (Inches): | 4" |
| Size: | 48" |
| Vent Type: | Non-Condensing |
| Used With: | T-D2-IN T-K4-IN T-M32 T-KJr2-IN T-M32-ASME |

Hi Jud, thanks for writing in. This pipe is considered category III stainless steel. Please refer to the install manual for your Mr. Heater unit for further venting instructions.