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On pre fab firplaces with the knockout on the side for a gas line, is it required to seal the area around the gas line.I always call these out to be sealed.Seems like I read that somewhere.Recently while inspecting new homes I have not seen where this area is sealed.It is so prevalent that this area is not sealed I have started to question if I'm correct for calling it out.I have gone to manufacturers installation pages where it is not mentioned.

Danny Pritchard

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Danny,

I have never even thought about what you are now questioning. I don't know. You must be very thorough. However, drawing on my years of experience as an HVAC service tech, I can't figure out why it would be needed, unless called for in the manufacturers installation instructions.

George

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Originally posted by Danny Pritchard

On pre fab firplaces with the knockout on the side for a gas line, is it required to seal the area around the gas line.I always call these out to be sealed.Seems like I read that somewhere.Recently while inspecting new homes I have not seen where this area is sealed.It is so prevalent that this area is not sealed I have started to question if I'm correct for calling it out.I have gone to manufacturers installation pages where it is not mentioned.

Danny Pritchard

Okay, I got what I was looking for.....

The following is from a Majestic fireplace manual:

Vermont Castings Majestic Products fireplaces are

designed to accept a 1/2 inch gas line for installation of

an approved gas appliance. (Vermont Castings Majestic

Products manufactures a wide variety of gas logs for

use in Vermont Castings Majestic Products fireplaces.)

Be sure to have the appliance installed in accordance

with building codes.

Gas connection may enter from either left or right side

of the fireplace.

Locate appropriate gas line in the outer casing of

fireplace and remove insulation from gas line tube.

(Fig. 26)

From inside the fireplace, locate the knockout on the

firebrick -- be sure you are on the appropriate or "gas

line" side of the fireplace. Using a flat bladed screwdriver

or small chisel and hammer, carefully tap around

the knockout until it loosens and falls out.

Install 1/2 inch certified gas pipe through opening. After

gas pipe installation is complete, use insulation that

was removed from gas line tube to repack space

around the pipe. Material should be inserted from

outside of the fireplace and packed tightly to totally seal

between the pipe and tube.

Note: Gas pipe should not come in contact with

any wood structures until it has reached a point at

least one (1) inch away from fireplace side.

Okay, that's what the mfg. sez. After sealing it w/ the fiberglass, my source also recommended laying some refractory cement over the fiberglass to seal it in place.

Many thanks to "Chimney Bob" Priesing, of Havelock Chimney Sweep, Inc. in Havelock, NC. If any of you get a chance to hear this man talk about fireplaces, do it; he's the best.

http://www.havelockschimneysweep.com

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