DuraVent Type B Gas Vent 18
Explore 18 inch Type B gas vent pipe and fittings in the DuraVent Type B Gas Vent product line for your next purchase, replacement, or installation project. Listed Type B vent carries flue gases from appliances specifically approved for Type B venting; it is not interchangeable with a sealed direct-vent or condensing exhaust system.
For a dependable match, check correct series, 18 inch nominal size, listed appliance application, fitting type, and mounting or termination requirements. The DuraVent Type B Gas Vent label identifies a particular product family. Nominal size alone does not establish compatibility with other brands or other venting designs.
How to choose 18 inch DuraVent Type B Gas Vent
For 18 inch Type B gas vent pipe and fittings in the DuraVent Type B Gas Vent product line, correct selection begins with the job the product needs to perform. Listed Type B vent carries flue gases from appliances specifically approved for Type B venting; it is not interchangeable with a sealed direct-vent or condensing exhaust system.
Appliance and vent system
Type B gas vent, direct-vent assemblies, condensing-appliance polymer vents, and gasketed special gas vent are intended for different applications. This group is organized around 18 inch. Check whether the number refers to a single nominal vent diameter or, in concentric designs, a pair of passages; actual dimensions can vary by series. The DuraVent Type B Gas Vent family is a useful way to narrow the search, but its joint style and approved accessories still need to match.
What to compare before ordering
- Confirm the appliance manufacturer, model, fuel, and approved vent category or vent family.
- Compare DuraVent Type B Gas Vent 18 inch Type B joints, diameter, supports, approved gas appliance, and termination.
- Review elbows, tees, supports, wall or roof penetrations, clearances, and termination instructions.
- Check whether any transition or substitute component is explicitly authorized by the manufacturer.
Venting layout and safety checks
A complete system may need more than a straight pipe section. Depending on the approved installation, review support hardware, turns, flashing, firestops, adaptors, cleaning access, and the appropriate termination. The permitted route and clearance to combustibles come from the appliance and vent manufacturer, not the category label. Confirm the appliance vent category, listed manufacturer system, joint type, vent diameter, and clearance requirements. If the installation uses a pressure-tight or condensing exhaust system, verify all joint sealing and condensate-handling requirements in its installation guide.
Can DuraVent Type B Gas Vent 18 inch replace direct-vent gas fireplace pipe?
Not on the basis of diameter. Type B gas vent and direct-vent assemblies are different listed systems with different appliance applications. Use only the vent family named by the appliance installation instructions.
Use the individual listings below for current product details, and confirm the installation manual before final selection. Gas exhaust venting and fuel-supply piping are different product systems.
