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CSST pipe for propane

rickdesfl

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Aug 26, 2024
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2
I live in NH.
I had my 100 gal propane tank, which used to sit right next to my house, moved about 25 feet away from the house. I ran 3 inch PVC pipe from the previous outside house connection to the where the tank was moved. I ran 1 and 1/2 inch liquid tight conduit in the PVC pipe and installed 1/2 inch yellow CSST in the liquid tight conduit. My propane company came up with all kinds of reasons why this would not work from saying CSST pipe cannot be used underground to saying it could not be used in liquid tight conduit to saying CSST is not allowed in NH They wanted to dig everything up and start over using poly pipe. I told them to come up with an alternative without removing the PVC and liquid tight conduit and they left.

So my question is are they FOS and just trying to get $$ out of me to redo the job or are any of their reasons legit? I've had problems with this company before giving me false and misleading information. Any info would be appreciated.




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PCustoms

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Propane company is pretty much in charge here....

Where does the PVC terminate, is it open to the outdoors?
 
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rickdesfl

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The PVC terminates outdoors just as the previous connection was outdoors. None of these responses answer the question.
 

chinboys

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Find a licensed plumber or union pipe fitter in your area and ask them.
Your local zoning board should decide if CSST can be used and how.
 
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mm08822

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Check your csst mfr's specs.

They could argue the sealtite is not used as listed. I would have run copper or poly in a sand bed.

You will need to seal the 3" and 1-1/2" to prevent rain water from entering.

Call your inspector for the final say.
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Jackfre

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N CA
Your propane company is advising you correctly, or advising you as to what they are willing to accept liability wise. They are the gas company and the buck kinda stops with them. I’d have done the poly pipe in the first place. It is a hell of a lot less expensive than CSST, is direct burial and produces no homeowners insurance issues. One of the best parts of the poly pipe is the sweeps that let you go from underground at the building. Pop a gas valve on top of it and it is dry and sealed. I’m a fan of csst inside but would not run it underground. I don’t like being an early adopter of product certs especially in gas products.
I did a lot of work with all the LP companies in NH over the 25 yrs in my business selling and training on gas products. Top notch in my book.
 

fitter30

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Peace Valley,mo
The pvc that was used was it grey electrical? Grey pvc is not water proof it's water resistance. No fittings under ground. Good possibility that ground water could at some point corrode the stainless.
POST 8 read the last paragraph
Check with the manufacturer.
 

Firebrick43

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West central Indiana
Our co-op wouldn't let you be a customer either without redoing it.

First is there rarely such a thing as liquid tight conduit. Most of it will fill up with water eventually unless it has a way to drain. We allow only low pressure CSST to the outlet of the second stage regulator, and prefer it to be sleeved but must have a way to drain.

Second, you say CSST but that is nebulous. There are many brands and styles with very different specs. Most of it is for low pressure use only (under 5 psi). Most setups from the tank to the house are 10 psi.

There is issues with lightning as well with CSST. Yellow CSST has little protection even if bonded. And that is what 95 percent of DIY installations are.

Black covered Flash Shield is much better but it isn't a DIY product.

And then the biggest issue, the propane company is responsible and LIABLE for all the outside piping. DIY install doesn't remove that liability from them. There is no good way to inspect the underground CSST to see if it was installed correctly.

So my question is are they FOS and just trying to get $$ out of me to redo the job or are any of their reasons legit? I've had problems with this company before giving me false and misleading information. Any info would be appreciated.
If they were out just to get money out of you, they would of just hooked you up and sold you gas.

They don't want the liability of a **** install on their hands.
 
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