CSST in conduit

[rasit]

What are the chances I will be able to pull 3/4" CSST gastite pipe through a
1-1/2" sweep 90*bend (PVC Sch.40 electric conduit)? I ran 50' of straight conduit with one 90* bend under slab when I built the semi-detached garage in case I ever wanted to run propane for a heater. I originally thought I would only need a 1/2" gas line however after running the calculations for a 65,000 BTU heater I picked up, it turns out 3/4" is required. I am concerned about putting the cash out only to find out it won't be flexible enough to make the last three feet of the pull through the bend. Whatcha think???

 

[Saint]

Should work but you'll have to do a good job hooking your pull rope on the end. You also better have someone on the feeding end. If you can round up a couple of electricans to help I'm sure they can get it done.
Good luck, Hal

 

[D.J.]

I wouldn't think it would be a problem. As long as the 9 degree bend is truly a sweep designed fitting. If in doubt maybe try an approved lube for the CSST?
________
Paxil Withdraw

 

[cowboyjosh]

I HATE, HATE, HATE, CSST with a passion. I won't build or own a home with the stuff. Just saying.

Rant over.

 

[MrMark]

why would you even think about doing this? PE pipe seems to me to be way better for this application. I am going to take a class to be certified in PE pipe so I can buy the materials to do a small run of it.

 

[rasit]

why would you even think about doing this? PE pipe seems to me to be way better for this application. I am going to take a class to be certified in PE pipe so I can buy the materials to do a small run of it.

Because it is an approved flexible material for interior gas piping. PE pipe is limited to exterior applications by code. I am adding from my exisiting black iron line in the basement, through a crawl space, through the conduit and into the garage. I already have my certification for CSST installation but have never tried pulling through a conduit.

 

[Saint]

CSST is a listed product and should work fine for your application. I suggested using a couple electricians because they would have experience with pulling wire and you will be doing essentially the same thing. As long as you can work with another person and develop a rhythm during the pull, you will do fine. I don't know if there is a lube you can use but if you use any be sure it is approved as some may attack the CSST outer cover.
The 11/2" electrical pvc should have plenty of radius for your pull.
Good luck, Hal

(retired electrican & building inspector)

 

[59 wagon man]

you may want to check the code and with the manufacturer if the rare eventy of a leak unless you can seal it gas tight you will have an open gas line feeding into the house or garage . in my experience when a gas line is sleeved the sleeve should be sealed and vented to the outside . i am also certified in csst but have never tried to sleeve it in conduit. however there is a special made sleeve kit to do what your are attempting but i guess it defeats the purpose as you would have to re run the sleeving material

 

[cowboyjosh]

I still hate CSST; just my .02 nothing more.

 

[CamarosRus]

How many BTU is 3/4" gastite CSST rated for ????

Somehow I have a 100K BTU REZNOR running/heating my shop on a 70' long 1/2"
line.

 

[Mr onetwo]

I am not sure about the code requirements in PA.I am a licensed tech and I would run a 2 PSI system with a Maxitrol at the heater.That way you can run 1/2"...much cheaper and EZ to pull.Vent the outer end of the sleeve and seal the inside end.Put a vent limiter on the Maxitrol and you are good to go.Very common application....NFPA approved.

 

[ishiboo]

I am not sure about the code requirements in PA.I am a licensed tech and I would run a 2 PSI system with a Maxitrol at the heater.That way you can run 1/2"...much cheaper and EZ to pull.Vent the outer end of the sleeve and seal the inside end.Put a vent limiter on the Maxitrol and you are good to go.Very common application....NFPA approved.

Not sure what a "Maxitrol" is other than a brand, are you just referring to running the second stage regulator at the garage?

If so, I believe the issue is the run is partially inside, where the higher pressure would not be allowed, correct?

 

[philjafo]

The higher pressure is allowed inside, however a maxitrol(pressure regulator) would be needed at each appliance and a new gas meter. If you use the yellow csst be sure its grounded properly because lighting strikes will burn holes in it otherwise, and be sure to check your local codes.

 

[purevil115]

I ran it in gray pvc to my detached garage. easy to run easy to pull i see nothing wrong with it at all. Aslong as its a solid piece from building to building and connects are good inside whats the problem.