Recently there has been calls into the office from people who have been to local retailers that no longer carry 22 gauge black pipe and have been offered 28-30 gauge pipe as an alternative.
30 Gauge piping is DUCT WORK AND WILL GLADLY HAVE YOUR HOUSE BURNED DOWN BY NOON TOMORROW !!!!!!
If that is the case though it may take a little more time please give us a call and we will order you some in !!!!
Installation Rules for Flue Pipes
(also called stove pipe, smoke pipe, chimney connector, etc.)
The rules provided here are based on the installation code used in the US and Canada. For the exact rules in your area, check with a local wood heat retailer, chimney sweep or building inspector.
Maximum overall length of straight pipe: 3 m (10 ft.)
The assembly should be as short and direct as possible between the stove and chimney. The use of two 45 degree elbows is often preferable to a single 90 degree elbow because less turbulence is created in the exhaust flow and they result in less horizontal run.
Maximum number of 90-degree elbows: 2. Maximum unsupported horizontal length: 1 m (3 feet).
Galvanized flue pipes must not be used because the coatings vaporize at high temperatures and release dangerous gases. Use black painted flue pipes.
6-, 7-, and 8-inch diameter flue pipes must be at least 24 gauge in thickness.
Flue pipe joints should overlap 30 mm (1 1/4 in.)
Each joint in the assembly must be fastened with at least three screws.
The assembly must have allowance for expansion: elbows in assemblies allow for expansion; straight assemblies should include an inspection wrap with one end unfastened, or a telescopic section.
Minimum upward slope towards the chimney: 20 mm/m (1/4 in/ft.).
One end of the assembly must be securely fastened to the flue collar with 3 sheet metal screws and the other end securely fastened to the chimney.
There must be provision for cleaning of the pipes, either through a clean out or by removal of the pipe assembly. Removal of the assembly should not require that the stove be moved.
The crimped ends (male) of the sections must be oriented towards the appliance so that falling dust and condensation stay inside the pipe.
A flue pipe must never pass through a combustible floor or ceiling or through an attic, roof space, closet or concealed space.
Minimum clearance from combustible material: 450 mm (18 in.). The minimum clearance may be reduced by 50 percent to 225 mm (9 in.) if suitable shielding is installed either on the pipe (double wall black pipe) or on the combustible surface.
The ideal flue pipe assembly is one that rises straight up from the appliance flue collar and directly into the chimney with no elbows
A straight flue pipe assembly offers the least restriction to gas flow and results in stronger draft. Straight assemblies also need less maintenance because there are no corners for creosote deposits to accumulate.