I have some 20 lb. LP gas tanks that I use from time to time. The tanks have the new type valve which has threads on the inside that will receive the standard brass hose fitting that has to be attached with a wrench, and has very coarse threads on the outside which will receive the black plastic -brass hose fitting which can be screwed on by hand.
I bought a couple of these plastic-brass knobs and attached them to the end of the hose. I can attach the hose to the tank by hand but when I turn on the gas to the appliance (in this case a turkey fryer) I get very little pressure and it will not work.
When I look at the brass fitting inside the plastic knob it has a small orifice and has what looks like a stainless steel ball bearing down in behind the orifice fitting.
The original brass fitting has about a 3/16″ hole all the way through and works fine.
Can someone tell me what I’m doing wrong If you are familiar with this fitting ?
This new fitting must be used for something other than I what am trying to use it for.
Replies
The new fittings are alignment critical, i.e. the center part of the valve must be pushed in by the connector for it to release gas. Kind of like the valve stem on a tire.
As you are tightening the threaded part, wiggle the fitting so it doesn't hang up & does press in on the center. Might take a try or two. If you check, you'll find you can't blow off some lp just by opening the valve - it must be hooked up to a proper connector. Safety, you know.
Paul
Thanks for the reply. Since my post I've been reading about this from one of the LP gas websites.
They say not to use the connector on a device like a fish cooker. That may be the problem.
When I look at the brass fitting inside the plastic knob it has a small orifice and has what looks like a stainless steel ball bearing down in behind the orifice fitting.
The original brass fitting has about a 3/16" hole all the way through and works fine.
There is your problem.....flow restriction. go back to the original fitting.
One thing that is very easy to overlook, especially when you are using a 'turkey fryer', is to check the air-ventury port for the burner and make sure it isn't clogged up with a insect cocoon or other foreign matter.
These chinese made burners are very crude and an easy place for an insect to seek refuge and set up house.
I ran into a similar situation with a LP burner that stays outside on the porch.