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Old 12-20-2011, 06:25 PM   #29
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Isn't this all a moot point since the ACME fitting tanks have a float which shuts off the ability to fill above 80% of the volume of the tank?
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Old 12-20-2011, 06:38 PM   #30
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Actually, not. The so-called OPD valves are there to prevent overfill, but they are mechanical devices, subject to possible failure and not regularly inspected. The reason why NFPA first required them was to attempt to prevent overfilling by home fillers. Evidently, the requirement has reduced some of the accidents. And even while requiring the OPD on cylinders, NFPA still requires fillers to use either volume or weight. (Note that many states regularly inspect both filling machinery and scales.)

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Isn't this all a moot point since the ACME fitting tanks have a float which shuts off the ability to fill above 80% of the volume of the tank?
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Old 12-20-2011, 06:49 PM   #31
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And all of this can become a non-issue if we all went to those polymer semi-transparent tanks and could see the level visually. I just don't like the look but they would be covered by the tank cover.
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Old 12-20-2011, 06:52 PM   #32
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What is a tank cover?
Can they be polished?
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Old 12-20-2011, 07:01 PM   #33
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I take my tanks to my Gas Dealer with whom I have an account for OX/Actene and those tanks. They weigh and meter what is put into my tanks.
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Old 12-20-2011, 07:18 PM   #34
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I'm in the "open both tanks and wait for the change over camp" I just have one question.

Has anyone parked the trailer close enough to a propane filling station to fill the empty tank without taking it out? Or is that o.k. and safe to do that way?
You probably could, but I'm not sure why you'd want to.

As a former B190 motorhome owner, I can say that one of the things I hated the most about the motorhome was having to drive the camper to get the propane tank filled every time. Believe it or not, I now actually enjoy driving the truck (and JUST the truck) to the gas station to get a propane tank filled. It's a minor thing, I know, but it always really bugged me with the motorhome. I grew up with travel trailers, which is probably why I feel this way.
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Old 12-21-2011, 01:30 PM   #35
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What is a Tank Cover

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What is a tank cover?
Can they be polished?
AS the name implies, a tank cover is a highly polished, clear-coated cover that covers both tanks. Tank valves are accessed via a piano-hinged, painted cover, as shown in the picture.
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Old 12-21-2011, 01:56 PM   #36
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Actually, not. The so-called OPD valves are there to prevent overfill, but they are mechanical devices, subject to possible failure and not regularly inspected. The reason why NFPA first required them was to attempt to prevent overfilling by home fillers. Evidently, the requirement has reduced some of the accidents. And even while requiring the OPD on cylinders, NFPA still requires fillers to use either volume or weight. (Note that many states regularly inspect both filling machinery and scales.)

Lynn
The OPD is supposed to be a safety device, not an operating control. It's still possible to overfill a tank with one, especially when gravity filling them.

I had always understood the reason for the OPD valves to be to address a very specific accident scenario:

1) Homeowner with BBQ grill takes 20# tank to store to have it filled
2) Insufficiently trained, apathetic, minimum wage individual overfills tank
3) Homeowner puts tank in trunk of sedan and drives home in the hot sun
4) Heat of trunk leads propane to expand and vent through relief valve
5) Sedan explodes from accumulation of propane in the trunk

RVs were never really part of the problem, because RV propane tanks are usually mounted on the tongue in a bottomless enclosure, or at worst in a well-ventilated locker. It's hard to imagine enough gas accumulating to reach the lower explosive limit unless the RV is parked indoors or maybe in a depression with no wind, and the accident history isn't there.
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Old 12-21-2011, 02:47 PM   #37
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AS the name implies, a tank cover is a highly polished, clear-coated cover that covers both tanks. Tank valves are accessed via a piano-hinged, painted cover, as shown in the picture.

Ummmm, Kevin - I think Frank was taking a shot at me but I thank you for the picture and description in case he has taken off his aluminum helmet and is being bombarded by gamma rays.
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Old 12-21-2011, 04:37 PM   #38
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If the tank is upright when you fill it then you can't overfill it with an OPD valve. It has a float on it that shuts the valve off. Turn it upside down and it does not work. I really don't see the need for a OPD valve in this case. I would have to downgrade my tanks to put that stupid valve on. Gas companies know how to fill them but the law says not to fill a non OPD tank. It is government messing in our business.

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Old 12-21-2011, 05:11 PM   #39
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In fact, it's 50 different laws as this is a state matter, not a federal one. Actually, it's fewer than 50 since some states don't have any laws in this regard. And at least one state that I know of did not adopt the NFPA recommendation that all DOT cylinders would have to have OPDs.

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If the tank is upright when you fill it then you can't overfill it with an OPD valve. It has a float on it that shuts the valve off. Turn it upside down and it does not work. I really don't see the need for a OPD valve in this case. I would have to downgrade my tanks to put that stupid valve on. Gas companies know how to fill them but the law says not to fill a non OPD tank. It is government messing in our business.

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Old 12-21-2011, 06:46 PM   #40
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AS the name implies, a tank cover is a highly polished, clear-coated cover that covers both tanks. Tank valves are accessed via a piano-hinged, painted cover, as shown in the picture.
Vintage trailers do not have tank covers. Many of us sport polished aluminum tanks that our wives can apply lip stick by. New trailers hide their tanks behind modern Airstream aluminum. My post was a pun directed at Clancy Boy. He knows I am a vintage snob and am very proud of it. I know exactly what a tank cover is and that it indeed cannot be polished.
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Old 12-21-2011, 08:34 PM   #41
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Vintage trailers do not have tank covers. Many of us sport polished aluminum tanks that our wives can apply lip stick by. New trailers hide their tanks behind modern Airstream aluminum. My post was a pun directed at Clancy Boy. He knows I am a vintage snob and am very proud of it. I know exactly what a tank cover is and that it indeed cannot be polished.

As I said before - there is some gamma ray exposure and some living to far north damage going on there. "wives" plural, how do you afford aluminum tanks?
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Old 12-22-2011, 04:57 AM   #42
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Only one wife at this point. If I could find another as good as my current one, I gladly consider a second or third. I did however say "Many is us..." meaning I was speaking for more than just me as a vintage owner.
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