Adding a LPG valve to my car

I come to you with a very unusual plan. I want to add a valve to my car (probably next to the regular tank opening, so it looks like my car runs on LPG) and connect that with a gas hose into my trunk, where I'd have a regular propane gas bottle connected to it.

To summarize my reasons as to why I want to do this, because I know most posts will be questions as to why I would do something so moronic, here in Germany, we have very draconic laws regarding most things. You are not allowed to refill gas bottles by yourself at the gas station, and the wagie inside is legally required to stop you from doing so, instead you have to go to a hardware store or whatever and they do it for twice the price LPG costs at the gas station. You are however, allowed to refill your LPG car at the gas station, or gas bottles that are integrated into the car, as long as they have an outside connector. So instead of wagies shouting at me, and potential expensive interactions with the police, I just want to add my own outside connector and not pay the moron tax on LPG. It would still be illegal, because you can't just add a bottle into a car by yourself (obviously), but no one would ever find out.

Now my actual question is, do I just need 2 connectors, one to the LPG pump, one to the gas bottle, and a hose in between those two? Is there anything I'm missing here or is it that simple? And does anyone know which valves exactly I'd need? As far as I know the LPG pump can just be used to refill those bottles, people at the border to the Netherlands supposedly do that all the time by driving over there.
Would it even be possible to connect multiple gas bottles to such a hose at the same time? I know I could just drive off, refit to the next bottle, drive to a different station and repeat, but it would add a lot of convenience if I could refill like 5 bottles at once. This one is optional though if it would be a headache to do, I can live with filling one bottle at a time.

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  1. 11 months ago
    Anonymous

    what a low effort troll
    >germany
    >mod my fuel tank

    • 11 months ago
      Anonymous

      Hello my fellow basketball american, you seem to not have finished elementary school, so your confusion as to what I'm asking is understandable, given your inability to read.
      I'm not modding anything on my car. I want a valve that accepts an LPG pump, connected to some kind of hose, going into a gas bottle that is not connected to the car itself in any way, it's simply sitting in the trunk.

      • 11 months ago
        Anonymous

        >I'm not modding anything on my car.
        >I want to add a valve to my car (probably next to the regular tank opening, so it looks like my car runs on LPG)
        the TÜV will rightfully sent your shitbox straight to africa, sweaty

        • 11 months ago
          Anonymous

          Surely this once-proud people hasn't been reduced to obeying their you-know-who-run government. Is this the power of the Ordnung?

          • 11 months ago
            Anonymous

            Germany consists of little boys who were raised by women. They have no idea how to live in the real, physical world anymore.

            >These gas bottles are rated for the same pressure as the LPG pump, you can easily connect it directly and fill it up, safely.
            OK but that statement doesn't jive with this statement:
            >I don't want to find out the pump doesn't fit into the valve at the gas station, that would be a difficult situation.
            Because someone born of the legendary history of German engineering should realize that connectors that ought to be the same but aren't, aren't the same for a reason.
            (Unless your name is Mohammed in which case you should have a native sense of when your car should and should not blow up)

            Ok your post made me realize that I simply need exactly the same valve as the one on the gas bottle. Does anyone know which valves the bottles here in the EU usually have?

            ok, please post how you installed a vavle right next to the tank opening wihtout drilling or modifying anything on the chassis and tank itself
            [...]
            the tüv is an annoyance, but it keeps our traffic from deteriorating to 3rd world conditions, also an IQ barrier for car ownership. You either know how to fix a car properly or pay a pro. You cant because your a gypsy? Bus for you then.
            No ziptie Black personfix on the break caliper

            Drilling the chassis is fine you busybody.

            • 11 months ago
              Anonymous

              >Ok your post made me realize that I simply need exactly the same valve as the one on the gas bottle.
              I think you're missing the point, let me ask a slightly different question. Since German gas stations have large LPG tanks used to fill up cars, why don't they offer a service to fill up your home tank? Even by an attendant for a similar price as the hardware store.
              (Here in burgerland most gas stations / C-stores have a propane tank exchange, the hardware stores do as well but there are more gas stations than hardware stores. The only place around me that has a LPG dispenser is actually a U-Haul store and their customers are mostly people with RVs)
              The question is, is there a reason why they don't do this, because I suspect the reason is that you can't fill up a home tank off a dispenser used to fill cars.

              • 11 months ago
                Anonymous

                There is no actual reason. The official reason they give is that this has to be done by a trained professional, preferably from the same corporation that sold you the gas bottle, because, and I quote "The bottle could be tipped over while refilling, which would disable the overfill protection and consequently lead to an explosion if the gas bottle overheats while overfilled". Yes I'm not joking that's the reason they came up with.
                Anyways as I said, I could drive over to the netherlands, fill up the same bottle at the same brand gas station at the border, with the same LPG pump, and no one would bat an eye. Over here I can't. It's just legal red tape. But I'm not driving for 3 hours to fill gas bottles, so that's why I want to add a gas valve to the chassis of my car.

              • 11 months ago
                Anonymous

                There is no actual reason. The official reason they give is that this has to be done by a trained professional, preferably from the same corporation that sold you the gas bottle, because, and I quote "The bottle could be tipped over while refilling, which would disable the overfill protection and consequently lead to an explosion if the gas bottle overheats while overfilled". Yes I'm not joking that's the reason they came up with.
                Anyways as I said, I could drive over to the netherlands, fill up the same bottle at the same brand gas station at the border, with the same LPG pump, and no one would bat an eye. Over here I can't. It's just legal red tape. But I'm not driving for 3 hours to fill gas bottles, so that's why I want to add a gas valve to the chassis of my car.

                The reason is, home tanks are designed to supply LP vapor. Vehicle supply tanks are set up to deliver LP liquid.
                They have different fill procedures.

        • 11 months ago
          Anonymous

          It won't be welded in or whatever, I'm just going to put it in when I want to fill up bottles and take it back out again afterwards. Even with our tyrannical laws I believe the valve itself isn't illegal, since it's not connected to the car internals in any way. With your logic car stickers would be illegal as well.

          • 11 months ago
            Anonymous

            ok, please post how you installed a vavle right next to the tank opening wihtout drilling or modifying anything on the chassis and tank itself

            Surely this once-proud people hasn't been reduced to obeying their you-know-who-run government. Is this the power of the Ordnung?

            the tüv is an annoyance, but it keeps our traffic from deteriorating to 3rd world conditions, also an IQ barrier for car ownership. You either know how to fix a car properly or pay a pro. You cant because your a gypsy? Bus for you then.
            No ziptie Black personfix on the break caliper

            • 11 months ago
              Anonymous

              Unless you know certain shithole tüv stations. Then ur free to go with ur shitty rust bucket and ziptie Black personfix on "perfomance bmw" cars

            • 11 months ago
              Anonymous

              >IQ barrier for car ownership
              I thought the amerifat system would be a bigger deal than it is without the filter.
              I think it's OK because of lower pop density and self segregation.

              So does anyone know which kind of valve I need to connect to an EU LPG fuel pump?

              Just get the extension hose for the tank, but one without regulator.

            • 11 months ago
              Anonymous

              >tüv
              The tüv are morons. I got dinged during an audit so I needed to order a document to explain the criteria that I had violated. It had to get here before they left so I paid for courier shipping. It cost 180 USD all said and done. The document cited had nothing to do with the purported violation. They blandly apologized and removed the erroneous citation. They made me waste a full day and 180 USD for nothing.

        • 11 months ago
          Anonymous

          >No you shouldn't do this because it's not allowed and for a good reason!
          Can you please go back to the phpBB forum where you get an Extra Helpful Power Poster badge for being a rules lawyering bore? I wouldn't mind if you were to die in a fire along the way, either.

  2. 11 months ago
    Anonymous

    Alright so LPG is transferred because it's at high pressure, that's how it remains liquid. You hook up a hose to the valve, expose an empty tank at lower pressure, it fills with LPG to equilibrium.
    So the first question you need to ask before you modden zer autowagen is whether the hose at the gassenstation operates at the same pressure as the one at the hardvarestoren. Otherwise you're going to set off a wunderwaffen in the trunk of your car when the tank ruptures. Surely there is some label on the dispenser that you can check against the maximum pressure of your tank?

    • 11 months ago
      Anonymous

      These gas bottles are rated for the same pressure as the LPG pump, you can easily connect it directly and fill it up, safely. It's just a law for creating moron jobs, because someone invested some money into buying politicians. As I said, other countries allow this, it's not like they use different gas bottles or pressures at the LPG pump, else there'd be lots of wunderwaffen when people from other countries drive there to fill up their cars. I'm just doing a sanity check on whether a simple gas hose will do to connect the bottle to the pump, and most importantly which valves exactly I need to do so. I don't want to find out the pump doesn't fit into the valve at the gas station, that would be a difficult situation.

      • 11 months ago
        Anonymous

        >These gas bottles are rated for the same pressure as the LPG pump, you can easily connect it directly and fill it up, safely.
        OK but that statement doesn't jive with this statement:
        >I don't want to find out the pump doesn't fit into the valve at the gas station, that would be a difficult situation.
        Because someone born of the legendary history of German engineering should realize that connectors that ought to be the same but aren't, aren't the same for a reason.
        (Unless your name is Mohammed in which case you should have a native sense of when your car should and should not blow up)

  3. 11 months ago
    Anonymous

    So does anyone know which kind of valve I need to connect to an EU LPG fuel pump?

    • 11 months ago
      Anonymous

      I work on LP equipment all the time. It's not a huge deal, especially if you are just dealing with a premade tank (like what you find on a forklift) and not trying to homeroll your own .

      But... You need to find out if you have either the bayonet (quick disconnect) or the thread on, they are both available on Ebay and Amazon.

      The bayonet/QD is often sold as a "DREHMEISTER EURO filling point adapter 22mm ", and the threaded (as you find in the U.S.) is the " Rego 741M ".

      I do not know what the connectors you are dealing with, so I can't say which is right.

      Pics would help.

      • 11 months ago
        Anonymous

        I'd probably buy the tank in the picture I posted, sadly the Amazon page doesn't say which connector it has. Comments there are just saying it's the regular connector that's found on all the steel/aluminum gas bottles here in Germany, which doesn't help.

      • 11 months ago
        Anonymous

        I found pic related as an adapter, amazon also has a gas hose for connecting two gas bottles to empty one into the other, I can post the picture of that in a second. So this adapter on the outside of the car -> gas hose -> gas bottle in trunk should work?

        • 11 months ago
          Anonymous

          This is the gas hose connector I'd buy, if that would work. Same connector on both ends. Or do I need male/female to connect the adapter and the bottle?
          I'm sorry if I have to be spoonfed, but it's really hard to find any information about this in Germany, and I have no idea beyond what I'm scraping together here.

  4. 11 months ago
    Anonymous

    6/10 bait OP, looks like you harvested some (You)s.

  5. 11 months ago
    Anonymous

    Aussies have been doing this shit for years. Just be careful because your BBQ gas tank doesn't have a shutoff float so you need to pay attention to when to stop filling. If the frickin abbos can do it you can too.

    • 11 months ago
      Anonymous

      Yeah I know, but German autism is relentless as you can see by the replies in this thread, so I need to hide the damn thing to not get in trouble.

      • 11 months ago
        Anonymous

        Here in MURRICA I'd set the tank right on my hood and fill it in front of the clerk. They aren't getting paid enough to say anything to me and no one else is gonna give a shit.

        • 11 months ago
          Anonymous

          Yeah I wish, it's not about the pay here, they're legally liable if they let me fill it up and I explode it later for some reason. The government even sends reminder letters to all gas stations that offer LPG that they have to train their clerks on this or else they'll be held liable and even lose their operating license. You don't even know how moronic a country can become

          Of course you can do it and do so safely after some study.
          Cooking Gas group on Fecesbook will have what you need to know and there are plenty of pics of fittings. Just ask how to assemble an LP cylinder fill connection and manifold with the fill connector on the outside of the vehicle.

          Asking here was of course a terrible idea because too many autspergtards.
          Industrial gas isn't TATP begging to explode.

          Will German gas stations refill vehicle cylinders like forklift cylinders? It's easy to connect those to anything. If EU cylinders for forklifts are "liquid withdrawal" they can be inverted for vapor withdrawal at your home etc.

          If you have to manually vent your cylinder you'll need to cater for that, too. It's not hard to study LP fittings and the group I linked can point you to sources for useful things like high pressure hose and fittings.

          >Will German gas stations refill vehicle cylinders like forklift cylinders?
          No, they fall under the same law that prohibits refilling non-stationary gas bottles. Unless I come in with a forklift with the cylinder secured to it, the wagie will try to shoo me away, and probably call the police afterwards so they send me a fine.
          I will check out that cooking gas group, I hope I don't need an account to read their stuff.
          So do you think the items I posted here

          https://i.imgur.com/mQcCPwf.jpg

          I found pic related as an adapter, amazon also has a gas hose for connecting two gas bottles to empty one into the other, I can post the picture of that in a second. So this adapter on the outside of the car -> gas hose -> gas bottle in trunk should work?

          https://i.imgur.com/oDUHd3b.jpg

          This is the gas hose connector I'd buy, if that would work. Same connector on both ends. Or do I need male/female to connect the adapter and the bottle?
          I'm sorry if I have to be spoonfed, but it's really hard to find any information about this in Germany, and I have no idea beyond what I'm scraping together here.

          would fit to the gas cylinder in the OP picture?

  6. 11 months ago
    Anonymous

    Of course you can do it and do so safely after some study.
    Cooking Gas group on Fecesbook will have what you need to know and there are plenty of pics of fittings. Just ask how to assemble an LP cylinder fill connection and manifold with the fill connector on the outside of the vehicle.

    Asking here was of course a terrible idea because too many autspergtards.
    Industrial gas isn't TATP begging to explode.

    Will German gas stations refill vehicle cylinders like forklift cylinders? It's easy to connect those to anything. If EU cylinders for forklifts are "liquid withdrawal" they can be inverted for vapor withdrawal at your home etc.

    If you have to manually vent your cylinder you'll need to cater for that, too. It's not hard to study LP fittings and the group I linked can point you to sources for useful things like high pressure hose and fittings.

  7. 11 months ago
    Anonymous

    >Can't refill lpg at pumps
    Wat?

  8. 11 months ago
    Anonymous

    You need regular LPG filling valve, some hose (Faro brand preffered) and matching fitting for tank. Could be bought quite easily in Poland. Filling 11 kg lpg tanks comes with some risk lol. There are ones used in capers with multivalves, which could be legally filled at petrol stations.
    Or you could buy standard lpg fuel tank (cylindrical) with multivalve (which comes with electrovalve at outlet, one way valve on inlet and safety features regarding overfilling an over pressurizing), and use it as mobile tank. You can get them in different sizes/capacities, but you would need to use pressure regulator. I use this setup alongside with lpg reducer from car to heat workshop, 60l tank lasts a long time.

  9. 11 months ago
    Anonymous

    Couldn't you just go to a place that fits LPG systems onto cars and buy a receiver fitting from them?

  10. 11 months ago
    Anonymous

    you cant do it. the cylinders are filled by weight and fixed liquid level gauge. you need to open a spitter valve and vent vapor or youre going to blow the cylinder and have a bad time.

    • 11 months ago
      Anonymous

      Why? I can just calculate how much I need to fill by volume and stop at 80% instead.

      • 11 months ago
        Anonymous

        youll be fine until you arent because your betting your life on the meter being precise and you dont know how much residual gas is left.
        also how much more does it cost? multiple tanks and fittings arent cheap.

        • 11 months ago
          Anonymous

          >because your betting your life on the meter being precise
          All meters are being tested and constantly recertified by a government agency here which is even more nit-picky than most other German government agencies. I have full confidence in those things not suddenly misreporting the flow by >20%.
          Also, it's not about the money, it's about sending a message.

          • 11 months ago
            Anonymous

            theyre tested by running hundreds of gallons through a fancier meter because the temperature compensator takes time to adjust. 20 liter fill could be off by 20% if its cold out. even then youll probably be okay but if something goes wrong the message youll send is the regulation is a good idea.

            • 11 months ago
              Anonymous

              You're wrong, they're all temperature adjusted. You think they're going to gift you some LPG when it's cold outside? Besides, it's not like the tank would instantly explode. It would have to heat up significantly first, and it would simply blow the relief valve. That's the worst case.

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