How to Install BVent

Most Btype (double wall) vents require one inch, but always follow what the manufacturer indicates This information is usually embossed or labeled on the vent/product.

Only two bends are permitted and tape is prohibited in some states.

It's good practice to check with your local building department to see if permits are required. This will ensure one's safety and also protect one's investment when it's time to file an insurance claim.

Flashing a Roofing B vent Flue Pipe on a metal roof using a hightemperature boot, Sashco Through The Roof Sealant. Learn the basics with Ron King, The Ultimate DIYer.

Tape was used along with very small 1/4 inch screws to insure other contractors did not hit the pipe and dislodge it because it was in a walkway.

The tape will be removed after construction ends. Note that some jurisdictions do not allow tape or screws. Screws are okay here. The 1/4 inch screws do not penetrate the second aluminum skin.

How high should Type B vents be above roof?
All metal vents must terminate at least 2 feet above the roof surface.

How much clearance is needed for B vent pipe?
Type B Gas Vent require a minimum of oneinch clearance to combustibles.
This oneinch is a typical clearance for all brands of Type B Vent, but each section of vent pipe is marked with the clearance required by Underwriter Laboratories, so it should be checked.

Do you put screws in B vent?
It is acceptable to use screws to attach the BVent to the appliance outlet and some counties will allow small screws in the pipe as long as to doesn't penetrate the inner wall.

What is the minimum B vent slope?
¼ inch per foot minimum pitch is required to vent horizontally. No downward dips or sags

Can you install B vent through wall?
The Wall Thimble is used where a Type B Gas Vent passes through a vertical wall. The Wall Thimble will provide for the proper clearance to combustible material as the vent passes through the wall, and will act as a firestop.

Single wall flue pipe may also be referred to as single skin, vitreous enamel or connecting flue pipe.
Type C vents are used only as connectors in most cases. They are often called “galvanized pipes”, used only for venting gas or oil.

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Parts used:
4" Gas Termination Kit https://amzn.to/41bmLFq
Duravent 4Inch Adjustable 90 Degree Type B Gas Vent Elbow https://amzn.to/4aaXBL0
Chimney 4 in. x 36 in. Type B Gas Vent https://amzn.to/4a68M7Y
100Feet Roll Galvanized Hanger Tape: https://amzn.to/3GzKpC5
Buck Professional Grade Aluminum Foil Tape https://amzn.to/47XaKG0
Sashco Through The Roof Sealant, 10.5 oz Cartridge, Clear (Pack of 3) https://amzn.to/3NbsgxV
10.5 oz Sashco 14010 Clear Through the Roof! Sealant Pack of 12 https://amzn.to/3Tbldcw
Through The Roof! Black 10.5 oz (Pack of 1) https://amzn.to/3NfZsES
Through The Roof! White 10.5 oz (Pack of 1) https://amzn.to/3RvQDZW

Tools used:
Spyder 13 Piece Bi Metal Steel Hole Cutter Saw Kit with Blades and Arbors https://amzn.to/4ako9tE

3 Piece Aviation Tin Snips https://amzn.to/3TbZYHu

DEWALT TAPE 25FT https://amzn.to/46KQTc0
MILWAUKEE 25Ft Compact Magnetic Tape https://amzn.to/41b7aWi

MALCO 4inch 1/4inch and 5/16inch Hex Driver (1Pack) https://amzn.to/4a7nY4I

Caulk Gun, 9 Inch Silicone Sealant Caulk Gun for Caulking
https://amzn.to/3Rf0guL

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