Polyethylene gas pipe union under ground?

[BellyUpFish]

Any of you guys used a coupler for yellow poly gas pipe in the trench?

I've got a run that's right at 200' I need to install and the local supplier only carriers 150' rolls. Unless I want to buy 425' roll, then they can sell me an entire roll.

So, it's looking like I'm going to be joining these in the trench.

Anyone have experience with these couplers? Don't really like having the joints in the pipe but I'm unfamiliar with it so maybe it's a non-event?

 

[slip knot]

My yellow pipe is connected to the metallic risers underground so I would assume they have a splice that is direct burial rated. check with the supplier.

 

[bullnerd]

I'm in the same boat. Right at 200'.

I'm going with one piece and either selling the leftover or using it for another gas project.

 

[BellyUpFish]

I'm in the same boat. Right at 200'.

I'm going with one piece and either selling the leftover or using it for another gas project.

Yeh, I thought about that, actually that's what I was going to do when they told me they sold 150' and 300' rolls. I just decided to buy the 300' roll, so I get there and they try and load up 2 - 150' rolls.

"Oh, if you want it uncut you have to buy a 4XX' roll.."

 

[The Cobbler]

my risers have typical unions on the ends. the riser has 1" cts poly pipe bonded to them , a 1" cts union and then the poly pipe attached to that.
I followed the manufacturer specs with the proper chamfer tool and had zero problems. there are inside & outside o rings so it's very robust connection. they really stressed the importance of marking the depth of the fitting insertion but I found it to slide on easily to that point and not go any farther. the chamfer tool chamfers both inside & outside of the poly pipe .
I think the proper chamfer tool is the secret to a leak free joint , but an ingenious person could replicate the tool easily
if you need any 1" cts unions I have some that could be available

 

[The Cobbler]

and, just to do a price comparison, look here
https://www.hdpesupply.com/mdpe-gas-pipe-coils/?sort=priceasc
https://www.hdpesupply.com/con-stab-gas-fittings/

 

[Marctrees]

Belly - Bottom line is either bet on replies, or check w Supplier/ Mfgr.

Many Guys here have awesome experience, and will probably be knowledgeable and correct, but I would get something important like this from the Horse's Mouth.

In print, like an emailed PDF or handed to you.. -- Mfg approved install info sheet.


Very different than "What color Racedeck should I get ??"

Future possible 6o'clock News headline- "Alabama home's front yard gas explosion, Entire Girl Scout Cookie selling group hope fully still within the County.... A Team called in to investigate.....

I think it's just too critical to do it any other way.

Marc

 

[Marctrees]

Cobbler does seem to know his stuff on this though.. Marc

 

[D45]

Are you still going with 1" poly?

Buy a 500' roll and sell the rest on CL or somewhere?

Or, just use a Constab coupling fitting?

https://www.hdpesupply.com/1-ips-sdr11-con-stab-gas-coupling/

I worked with 3/4" yellow poly, unions, chamfer tool and the risers when I did a buried gas line into my patio for my grill

It was VERY simple and easy to work with...........I bought everything from HDPE Supply

 

[yeldogt]

Is this for NG or Propane? ... do you have inspections. We have new rules in my PA town about new propane lines and inspections -- they require two now ...... and one must come from a certified propane installer if propane the other from the town. So the propane guy has to be on-site .... in my case its going to be Cu line.

 

[Tunajoe]

It's no problem to have a fused union underground.
Obviously just pressure test it before burial.

 

[ADSR]

I just had a Tee fitting put in mine. They used a special pipe welder that heated both ends and then pushed it on. They tested it to 125 PSI and called it good.

this is what they used....
'
https://www.hdpesupply.com/yellow-mdpe-socket-fusion/

and here's the welder....

https://www.hdpesupply.com/products/R63-TFE-Socket-Fusion-Welder-110v.html

 

[Adk Mike]

I'm a certified installer. Nothing wrong with a coupler in plastic gas line. The stuff is designed for that. We install tees and couplers all the time. I have never seen one installed probably leak. I mean never.

 

[Streetbu]

I weld polyethylene at work. Shouldnt be an issue if you can find a qualified guy with the right equipment. Would only take 2 mins to put a coupler in....

 

[finn]

They tee'd my buried line right in front of my tank.

One leg to the garage, one leg to the house.

 

[HoosierBuddy]

I'm a certified installer. Nothing wrong with a coupler in plastic gas line. The stuff is designed for that. We install tees and couplers all the time. I have never seen one installed probably leak. I mean never.

^^^^^^^^^^^^^^^^^^

This. I prefer heat fusion, but the stab couplings are fine for what you're needing here.

Phil

 

[bullnerd]

Yeh, I thought about that, actually that's what I was going to do when they told me they sold 150' and 300' rolls. I just decided to buy the 300' roll, so I get there and they try and load up 2 - 150' rolls.

"Oh, if you want it uncut you have to buy a 4XX' roll.."

Bummer!

Looks like the stab coupling gets the ok from the pros here so go for it.

No different than the riser fitting really.

 

[BellyUpFish]

I appreciate all the help guys.

No inspections out here. I live in the boondocks. I will have a certified guy do the install from the meter to the pipe and pipe to the heater for insurance purposes, I'll be doing the rest.

Looks like a coupler it is. Need to get the chamfer tool as well.


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[BellyUpFish]

Well this is what I wound up with for TNT service riser.

My only concern is having to guess at 125ftlbs to ensure its tightened.

I don't have a toque wrench that'll work here..




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[nh_yota]

You can use a crowfoot adapter on a regular 1/2" torque wrench if you can find one that will fit the nut. Or just tighten it as hard as you can with two 18" pipe wrenches.

 

[BellyUpFish]

Yeh, I think we'll be going the "hard as you can with pipe wrenches" route.


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[naturalgas]

Buried gas lines are cut and pulled/ ripped apart all the time and repaired with a short piece and couplings. Soap it up to check for leaks. If it makes you sleep better, slide a larger diameter sleeve of schedule.40 before you make final connection and bury it that way.


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