OT Propane Question

Could you have possibly cross threaded one of the fittings? 

Just a guess, but maybe try Teflon tape on the threads?

I didn't see where you said it was leaking propane through the fitting or threads so I'm not sure why people are offering tips on how to seal the threads? Are you saying that you have leaks or are you just concerned or distraught over the high pitch sound at a higher volume of gas output? To me it sounds like the volume of gas being expelled causing a Venturi effect which is giving you the sound pitch you are describing. I often hear this sort of sound using a nitrogen regulator especially when I bump it from a relatively low pressure to a high pressure very quickly.

I wouldn’t worry about it.

It's a long shot, give this a try ... shut off tank, disconnect hose from pizza oven, reconnect, turn tank back on very S-L-O-W-L-Y, light the oven as usual.
Like I said, it's a stab in the dark, it's a remedy for fixing low flame problem especially after connecting a fresh tank, but who knows 

You're good. Says this guy.

alaskanassasin said:

Or hold your lighter around the fittings

This made me laugh 

wouldnt worry about it if its not leaking and the oven gets to high temps.  freeze ups can happen if the propane flow gets to fast and its freezing out, had to change to a bigger regulator on the house and have had that problem on the weber. that noise sometimes happens when they over fill the tank, it may go away once you use it a few times

alaskanassasin said:

Or hold your lighter around the fittings

I had a leak at the shutoff valve on a gas stove once. I about sh!t when the plumber pulled out his lighter and lit it. It sat there burning like a pilot light.

I have a propane question for any experts here. I don't want to hijack this thread though, so please PM me if you have advice.

I made a propane fire pit for my wife in the back yard. I have a 24" round propane burner with the natural gas>propane adapter. It's plumbed to a piece of 1/2" line that is buried under ground and run about 15' and then stubbed out of the ground. I hooked a small propane bottle with regulator to the gas line.

It works like a charm every time I use it - for about 30-45 minutes then it just goes out like the bottle went empty - except the bottle isn't empty. My assumption is that the propane gas on the top of the bottle runs out faster than the LP turns into gas. I bought one of those bottle heater blankets and it didn't help.

How do I fix this? Bigger bottle? Different regulator? People with large propane tanks have a regulator on the tank plumbed to a gas line that runs to the house - how is what I did any different?

ColtsFan said:

alaskanassasin said:

Or hold your lighter around the fittings

I had a leak at the shutoff valve on a gas stove once. I about sh!t when the plumber pulled out his lighter and lit it. It sat there burning like a pilot light.

That is how I roll but probably not safe for the internet... I’ve had the hoses on fire while using cutting torches as well

Only thing I use propane for is my forge... 

I don't recall ever hearing any kind of whistling noise from the setup. Even when I had a gasser, I don't recall that. I do recall having tanks filled in the dead of winter venting when we had a warmer day (I could hear, and smell that) more than a few years back. 

As already noted, if you don't smell the propane leaking, I wouldn't really worry about it. They add some nasty smelling sheit to propane so that you'll pretty much smell any leak level you might have. Or use either soapy water, or even Windex, at the connections to check for leaks visually. 

@nolaegghead Thanks. 

nolaegghead said:

using a lighter to look for leaks is fine except in the rare case the tank is at ambient pressure (empty). 

You'll smell the mercaptan long before you have dangerous gas buildup and those tanks don't explode unless you throw them in a fire or shoot them.

@sci@SciAggie There's a frit in those cheap regulators that can get clogged up if they get wet.  You can usually fix this by heating the regulator disconnected at the lowest setting your oven goes.  Or replace the regulator. 

Sometimes taking the regulator off and venting any pressure in the hose can fix a "stuck" diaphragm.

can confirm that when wrapped in tannerite  packs, lit on fire, and shot with a .223 they will explode. I believe bourbon also plays a critical role in this process.