I went to turn on the LP gas on my 1993 Itasca and as I turned the on valve I could smell gas and feel air pressure on my fingers...seems like the leak is from the stem off the on/off knob... Does this make sense.When I close valve leak stops..Anything I can do about it or is it something for tech professional...

If the leak stops when the valve is fully opened, you can either live with the brief leakage or have a tech repair/replace the valve. If the leak does not stop when the valve is fully opened, then repair/replacement is your only option.

Spray some dish washing liquid and water. on knob, and fitting and gas line.look for the bubbles..willing to bet your gas line is dry rot..i have replace mine twice. Its a DIY project. Teflon tape and wrench

My tank is full...do I have to empty it to replace the valve?

Jackutah wrote:My tank is full...do I have to empty it to replace the valve?LPG dealer will take care of that when they replace the valve,

YES tank will need to be emptied when changing out valve.Valve has a double seat.....one that seals when valve is closed and one that seals when valve is fully opened (back-seated).Leak prevention when opening/closing valve is done via packing inside valve stem gland and a packing nut. Unlike a typical valve where packing gland nut can be tightened using a regular wrench most propane service valve packing gland nuts are internal style with recessed slots and require a 'spanner' type adjustment tool (bulk dealer/repair) or replacement of service valve.

LP leaking when I turn on valve... | Good Sam Community

Justas
Explorer
Dec 21, 2024
Today I drove up to fill up my car tank and when I attempted to unscrew the valve to fill up, the valve was leaking and blowing gas out. I looked it up on the internet and people said you should knock on the valve for it to click back in place and lock in, but I had no luck.
- way2roll
  Navigator II
  Dec 29, 2024
  Is this a question? And you are posting this in a 10 year old thread. You might have better luck posting a question in a new topic rather than trying to get responses buried in a 10 year old one.
Justas
Explorer
Dec 21, 2024
Today I drove up to fill up my car tank and when I attempted to unscrew the valve to fill up, the valve was leaking and blowing gas out. I looked it up on the internet and people said you should knock on the valve for it to click back in place and lock in, but I had no luck. I have no experience with maintenance with propane tanks and I do not want to do something unprecedented.
bob_b1
Explorer
Apr 04, 2015
I had this problem on my 1993 Itasca too. It won't leak if you open it all the way or close it all the way. Whichever way you turn it, make sure it is done tightly.
Old-Biscuit
Explorer III
Apr 04, 2015
Jackutah wrote:
I went out and tightened the nut behind the handle.it didn't turn much, but the leaking stopped...I opened...closed...and repeated a few times and it is no longer leaking...
For safety I am still having the entire lp system serviced for the season, but thank you all!

Glad to hear it was fixed with just a snug up on packing gland nut.
That is what it is for. No need to replace/repair further unless you have to tighten nut so much that valve is hard to operate.

Good to go!!

Thanks for the update
wa8yxm
Explorer III
Apr 04, 2015
If it does not leak when fully open.. Use the gas and when you next refill go to a Propane SERVICE station, not a propane Gas Station (one that can work on it,, OFten these are wholesale houses)

They can fix what is broken, or adjust what needs adjustment.
Jackutah
Explorer
Apr 04, 2015
I went out and tightened the nut behind the handle.it didn't turn much, but the leaking stopped...I opened...closed...and repeated a few times and it is no longer leaking...
For safety I am still having the entire lp system serviced for the season, but thank you all!
Dutch_12078
Explorer II
Apr 04, 2015
RayChez wrote:
Dutch_12078 wrote:
RayChez wrote:
It might be a bad regulator. I had to replace mine about eight years ago. This is a very common defect. Change it out, it is not hard to do it. I bought mine at a business where they sell nothing but propane and parts.

A bad regulator would not make the service valve stem leak.

You are correct if it is a bad valve, but I have never seen one yet leak at the valve stem. But one way to find out is to get a little soap and water and a brush and soap every place in the area he thinks it is leaking. Bubbles will show right away where it is leaking.

I've seen more leaking valve packings than I have leaking regulators. The OP said he felt the gas leaking from the valve stem. Maybe he'll come back and tell us whether back seating the valve stopped the leak or not. Obviously that wouldn't stop a regulator leak.
RayChez
Explorer
Apr 04, 2015
Dutch_12078 wrote:
RayChez wrote:
It might be a bad regulator. I had to replace mine about eight years ago. This is a very common defect. Change it out, it is not hard to do it. I bought mine at a business where they sell nothing but propane and parts.

A bad regulator would not make the service valve stem leak.

You are correct if it is a bad valve, but I have never seen one yet leak at the valve stem. But one way to find out is to get a little soap and water and a brush and soap every place in the area he thinks it is leaking. Bubbles will show right away where it is leaking.
Dutch_12078
Explorer II
Apr 04, 2015
RayChez wrote:
It might be a bad regulator. I had to replace mine about eight years ago. This is a very common defect. Change it out, it is not hard to do it. I bought mine at a business where they sell nothing but propane and parts.

A bad regulator would not make the service valve stem leak.
RayChez
Explorer
Apr 03, 2015
It might be a bad regulator. I had to replace mine about eight years ago. This is a very common defect. Change it out, it is not hard to do it. I bought mine at a business where they sell nothing but propane and parts.