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Water heater vent

C

cda

SAWHORSE
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Oct 19, 2009
Messages
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Basement
Not a mechanic ,

But normal size water heater vent going about a foot into a out a two foot diameter vent , that goes to outside

Legal????

If not IMC code section, 2003 if possible
 
Not enough information. But, the two foot diameter vent may constitute a chimney. Is it listed? What is its listed use? Is it single wall metal pipe? What gauge metal?

2006 Fuel Gas Code

503.4 Type of venting system to be used.

The type of venting system to be used shall be in accordance with Table 503.4.

TABLE 503.4 TYPE OF VENTING SYSTEM TO BE USED

APPLIANCES

TYPE OF VENTING SYSTEM

Listed Category I appliances

Listed appliances equipped with draft hoodAppliances listed for use with Type B gas vent

Type B gas vent (Section 503.6)

Chimney (Section 503.5)

Single-wall metal pipe (Section 503.7)

Listed chimney lining system for gas venting (Section 503.5.3)

Special gas vent listed for these appliances (Section 503.4.2)
 
Ok cannot answer the questions

The larger vent is existing

Will try to post a picture not sure if it will help
 
The first thing to look for and determine is whether or not the large diameter "vent" or chimney is factory manufactured and listed, or locally made. Are there any stamped markings or labels? If you cannot find any stamped marking or labels giving a listing#, then you can consider it to be unlisted. Next, is it single wall pipe? Also note how the connection between the different size pipes is made.
 
The smaller pipe is just basically inside the larger, about a foot, one no solid connection
 
Nope, do-over. Use a proper set of fittings and connect it all together. This looks like b-vent all the way, and therefore if connected, no problem.

One thing to check on is that if this is a fan assist appliance (unlikely), there is a minimum btu requirement for each size, so it is possible that the 10" is too big.
 
Both vents appear to be "b" vents. If this is true, all that is missing is the required connector. And, it will be difficult to impossible to find a connector for this application assuming each vent is a different brand from the other. The easiest legal fix is to run a new "b" vent the same diameter as the draft hood on the water heater all the way up through the 10" pipe through the roof and terminate with a correctly sized cap just under the existing 10" roof cap. No new roof flashing or storm collar required.
 
Dr. J: The only two tools a man really needs is duct tape and WD40. If it is stuck, and it should be loose, use the WD40. If its loose, and it should be stuck, use the duct tape.

cda: 2006 Fuel Gas Code: 502.2 Connectors required. Connectors shall be used to connect appliances to the vertical chimney or vent, except where the chimney or vent is attached directly to the appliance. Vent connector size, material, construction and installation shall be in accordance with section 503.

(Note: In your case, the vent is not attached directly to the appliance. It is connected to a draft hood located on top of the appliance (or should be)).
 
business's a/c company looked at it and said yes it is a problem

Will correct

Thanks for the backing
 
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