LP gas line

It's been a while since I did it- but gas co. here used copper if 50' or less would do it, yellow plastic if a longer run.

I found out the hard way that the plastic should be run in a conduit, or sand, or something to keep our stony ground from cutting it.
 

The yellow plastic is not allowed to be exposed to the weather/sun light.
Under ground is ok but it must be protected above ground.

Dusty
 
I installed a 20 KW whole house generator this summer.

The generator is just under 50' (total run) from the propane tanks.

I used 1/2" coiled copper.

Dean
 
BW,

I replaced mine about 5 years ago. I used copper tubing but the Propane guy recommended that I use "refrigerant grade" tubing. I did, but the stuff is so hard I couldn't make a flare with my hand flaring tools. I ended up taking it to a shop that makes hydraulic lines. They have a pneumatic tool for flaring copper. They made perfect flares in about 2 minutes.

Tom in TN
 
You should use Ward Flex and here in MD only a plumber can get it and install it. I have it on my Kohler standby generator. Hal
 
Here's the Ward Flex. Hal
a169064.jpg
 
Typically, under ground gets poly pipe with teflon coated risers and tracer wire. 18" deep. Above ground gets hard piped, galvanized for LP & natural gas gets black pipe, or stainless steel coated pipe such as the ward flex or gastite brands. Coated stainless typically isn't available to the general public. I had to go through a certification process from the manufacturer before the supply house would sell it to me.

Copper is common for LP under ground and I've seen a lot of old farm houses piped with soft copper inside.
 
We built a house last year and I ran the yellow plastic tubing. Hard risers at the tank and regulators. The line is Tee'd at the house and another line ran to my wife's sewing and craft room in another building. A high pressure regulator is on the tank and low pressure regulators are at the buildings.

All the parts were available at a propane supply and there was no question about me purchasing and installing it. The local propane supplier just did a leak test and all is well.

I later found the risers and other components on eBay for about half the price, same brand.
 
I would use poly or coated copper underground. Just my opinion but I wouldn't use csst (corrugated stainless steel)in my house. Its easy for plumbers but to me its a high risk product. Just check the code requirements for installation.
 

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