Gas unions

[Marcel R. Cyr]

In preference to this mess Jeff. ha. ha.

[Marcel R. Cyr]

I do like gas flex lines that look like this.

Attachment 14234

That makes me feel better. ha. ha.

Marcel

[Charley L. Bottger]

Just to throw a twist into this thread would a drip leg be required on a gas Pac or as some describe (package unit) in States or areas that require a drip leg?????

[Marcel R. Cyr]

Originally Posted by cbottger

Just to throw a twist into this thread would a drip leg be required on a gas Pac or as some describe (package unit) in States or areas that require a drip leg?????

Charlie;

What the hell is a gas Pac? ha. ha.

Never to old to learn and this peaks my curiousity.

If I had to guess, I would say yes, just before the final connection of whatever it is.

Marcel

[phinsperger]

Originally Posted by jpope

Flexible appliance connectors are the preferred method in this state. When I see a complete "hard-pipe," I will always recommend upgrading. . .

Jeff, why do you concider flex lines as an upgrade to hard-pipe? I can certianlly understand why it is a preferred method as they are quick to install but why chance a system from hard-pipe to flex if the hard-pipe is already in place?

[Charley L. Bottger]

Originally Posted by mcyr

Charlie;

What the hell is a gas Pac? ha. ha.

Never to old to learn and this peaks my curiousity.

If I had to guess, I would say yes, just before the final connection of whatever it is.

Marcel

Marcel;
A gas PAC as we refer in this area is simply a combination heat and cool unit sets external to the foundation on a pad and the supply and return air plenum's pentrates the foundation stem wall into the crawl or can travel up the gable ends into an attic area enclosed in a fur down made to look like a chimney. Also used in light commercial as a roof top unit.

We here is this area do not install drip legs on units that are exposed to freezing temps because we have high moisture content in the gas supply and do not want any ruptured drip legs.
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[Marcel R. Cyr]

We here is this area do not install drip legs on units that are exposed to freezing temps because we have high moisture content in the gas supply and do not want any ruptured drip legs.
Thanks Charlie;

If that is the case how do you rid the lines of moisture? And how does this affect the efficiency of the units?

Thanks
Marcel

[Jeffrey R. Pope]

Originally Posted by phinsperger

Jeff, why do you concider flex lines as an upgrade to hard-pipe?

Most of this state is in SDC 3 or 4 (seismic design category). Hard piping will almost always result in some type of failure in a moderate earthquake, usually at the fittings. Flexible connectors relieve the stress and allow the appliance to move independent of the piping.

[Jeffrey R. Pope]

Originally Posted by mcyr

I do like gas flex lines that look like this.

Attachment 14234

That makes me feel better. ha. ha.

Those look like "hoses" Marcel. Gas hoses are prohibited in CA except for specific applications. . .

CPC 1212.0 Appliance Connectors. (6) The connection of an indoor appliance with any type of gas hose is prohibited, except when used with laboratory or shop equipment or equipment that requires mobility during operation.

[Doug Edwards, CMI]

Check out this website, in particular this article. Also go to the left side of the page and click on Excessive Flow Valve link for some explanation on seismic issues. Hope this helps.

http://www.toolbase.org/Technology-I...s-steel-tubing

[Charley L. Bottger]

If that is the case how do you rid the lines of moisture? And how does this affect the efficiency of the units?

Thanks
Marcel

Its a trade off safety V/S maintenance issues would rather change out a gas valve than have to replace my home because it burnt down with me in it.

The volume of moisture in the gas supply here is cumlative over time does not have a tremendous effect of the efficiency of the appliance in the short term just long term.

On the other hand I have observed drip legs installed outside and have never observed one ruptured. Go tell I did not make the rule.

[phinsperger]

Originally Posted by jpope

Most of this state is in SDC 3 or 4 (seismic design category). Hard piping will almost always result in some type of failure in a moderate earthquake, usually at the fittings. Flexible connectors relieve the stress and allow the appliance to move independent of the piping.

Ah, I see. That makes sense. We don't have siesmic activity in my area so I never thought about it for that reason. We also do not strap the water heaters like I thing you do in your area.

[Jeffrey R. Pope]

Originally Posted by dedwards

Check out this website, in particular this article. Also go to the left side of the page and click on Excessive Flow Valve link for some explanation on seismic issues. Hope this helps.

EFV's are certainly a good product, but they only function after there is a break or failure in the line.

Most jurisdictions in CA prefer to see flexible appliance connectors to minimize damage to the gas piping during seismic activity. The Greater Los Angeles Area goes even further and requires seismic-shutoff valves to be installed at the gas-main. These will close the gas supply to a home if there is a magnitude 5.0 or greater (light/moderate category).

Our state shakes every day to some degree http://quake.wr.usgs.gov/recenteqs/latest.htm

[Doug Edwards, CMI]

Jeff,
yeah, I know, spent some time out there near San Jose in 1984 (NAS Moffit Field). We had a couple "significant emotional events" while I was there. I would probably have to sleep with one eye open all the time. Valves at the Main is a good idea. Just wish I had been the one to invent them.

[Charley L. Bottger]

(NAS Moffit Field).

That sure sounds like an Airdale

Blackshoe