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Old 05-13-2020, 02:25 PM   #1
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Default Onboard Propane tank - refurbish or replace

Looking for insights on refurbishing or replacing the propane tank on my GWV. It's a Manchester #6811. It is leaking when I open the valve after being closed all winter, probably the stem packing. The tank is about 13 yrs old and I was considering dropping it, cleaning it up and painting and replacing valves and such. New the tanks look to be about $600.

Any thoughts or experiences?

Dave
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Old 05-13-2020, 02:45 PM   #2
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Originally Posted by DaveBad View Post
Looking for insights on refurbishing or replacing the propane tank on my GWV. It's a Manchester #6811. It is leaking when I open the valve after being closed all winter, probably the stem packing. The tank is about 13 yrs old and I was considering dropping it, cleaning it up and painting and replacing valves and such. New the tanks look to be about $600.

Any thoughts or experiences?

Dave

Don't have directly related actual experience, but unless the tank is "REALLY" rusty and pitted, I'm be inclined to do as you are thinking - ie clean, paint and change valve if needed.

Did you confirm with bubble test if the valve is leaking from the packing, or possibly due to corroded tank threads? If the latter, that could be reason to replace the tank.

If it is leaking at the packing, did you open the valve fully? Some cylinder valves have a "back seal" feature such that opening the valve fully will prevent stem leakage. I don't know if that applies to propane tank valves though.

Brian.
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Old 05-13-2020, 02:59 PM   #3
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Don't have directly related actual experience, but unless the tank is "REALLY" rusty and pitted, I'm be inclined to do as you are thinking - ie clean, paint and change valve if needed.

Did you confirm with bubble test if the valve is leaking from the packing, or possibly due to corroded tank threads? If the latter, that could be reason to replace the tank.

If it is leaking at the packing, did you open the valve fully? Some cylinder valves have a "back seal" feature such that opening the valve fully will prevent stem leakage. I don't know if that applies to propane tank valves though.

Brian.
There appears to be no leak until I start to open the valve. It leaks as I am opening (unscrewing) the valve and still leaks as it is all the way open.
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Old 05-13-2020, 05:53 PM   #4
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I had a tank valve that was leaking also. It didn't leak when closed or fully open. Only in the process of opening. I had the valve replaced at a propane dealer. He evacuated the tank, put on a new valve and refilled the tank to 3/4 full. Can't remember the price but it was under $100. My foggy memory says around $45.

I agree with Brian. A propane place can also check rust/pitted condition and advise you if you aren't comfortable doing your own physical check.
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Old 05-21-2020, 06:37 PM   #5
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valves have two seats you must open it completely to BACK SEAT the vave leaks mid way are not a problem
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Old 05-21-2020, 07:16 PM   #6
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I believe Dave said it still leaked when fully open.
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Old 05-21-2020, 08:50 PM   #7
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Have it checked out by a professional. I went to Amerigas to get the shutoff/on valve replaced. I asked the guy who repaired it, about a 40 year propane expert, how long the tank will last. He replied, "Forever".
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