I screwed up, can it be fixed?

[TexasBob]

We were planning a pool until oil hit $25. Wife was crushed, wanted to do the patio extension still so we have a nicer backyard. This included a fire pit. All became rushed, I didn't do any research. At any rate, I ran flex line under/in the concrete to get gas to the fire pit from a stub out we had for a grill. If you haven't guessed by now, it whistles something awful . Can I do anything to help this other than only running it at about half throttle which makes it stop.

[RR 314]

We were planning a pool until oil hit $25. Wife was crushed, wanted to do the patio extension still so we have a nicer backyard. This included a fire pit. All became rushed, I didn't do any research. At any rate, I ran flex line under/in the concrete to get gas to the fire pit from a stub out we had for a grill. If you haven't guessed by now, it whistles something awful . Can I do anything to help this other than only running it at about half throttle which makes it stop.

Oooof. That stinks. Did you run the flex in conduit? I don't know of any way to get rid of the whistle without pulling new whistle-free line. Hope someone that does this for a living has a solution.

[mfarmer]

did you put a pressure regulator (pancake style) in the line? Line supply is more than likely to high for burner rating.

[captainsling]

Can you water jet under the patio and run a new line? You could cut out the old stub and mortar or grout around with the new one.

[IOWA BOW HUNTER]

Can you water jet under the patio and run a new line? You could cut out the old stub and mortar or grout around with the new one.

^
This is what I was thinking as well.

[mrc]

Propane or natural gas? It sounds like a pressure issue, CSST is ran in houses all of the time and at normal pressure there is no whistling.

[brokeno]

I'm thinking a regulator too

[TexasBob]

thanks guys. Natural gas. I'll try a regulator for sure.

[dawgkllr]

You ran a flex gas line under a concrete slab? I sure hope it never gets a leak in it under there or you're gonna have one mother of a firecracker some day. Gas/ propane is not something to be played with. I recommend calling a licensed plumber for running gas lines.

[FLASH_OUTDOORS]

I’m betting it’s not the line. Pressure is to high for burner. Regulator will solve


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[mrc]

Doe the feed for the line come out of your house or directly from the gas meter? What is the BTU rating of the burner. It sounds like either A) you need to lower the pressure on the line. It should be 6oz. or B) You have too much of a demand on the line which will cause a whistling also.

[TexasBob]

feed comes out of the house. piped in with the rest of my home appliances. Was here when we bought the house. Demand may be another issue its a large burner.

[StrayDog]

thanks guys. Natural gas. I'll try a regulator for sure.

Take a picture of the name plate on your gas meter/regulator at the meter. Call the gas company and ask what pressure they are supplying on the house side of the service (they should give you a value in inches of water column).

Compare the value the city gave you with the required supply pressure range the manufacturer of the gas burner for your fire pit.

Double check the burner for your fire pit was for natural gas fuel not propane. If it was designed for propane fuel then you will have to replace the burner. If the city is supplying gas at a higher pressure than the burner manufacturer recommends then you’ll need a regulator on your pit based on the recommended pressure from the burner manufacturer. You also need to check and make sure your gas line is sized correctly.

For the record, the international gas code requires piping in solid floors to be ran in a channel or be run through a pvc conduit.

[mrc]

Without seeing it all, just based on the info you are giving me it sounds like you burner is over sized for the supply, since you said it quits when you cut back the burner.

[unclefish]

I had the same problem when we installed our fire pit. I took the burner off and drilled the small burner holes out larger. It helped quite a bit with the noise.