Gaslow potential risk

[7735]

I have a single 11kg Gaslow bottle with an inside filler point which I took out of my previous motorhome. I am thinking of installing it in my new van. Although the gas pipes are protected by cut of valves in case of a crash there is no cut off on the filler pipe. If the filler pipe was damaged the whole bottle would vent. Do the new setups provide any safety feature on the filler pipe.
Spongy

 

[icantremember]

I thought the filler pipes have non-return valves at both ends.

 

[pj650]

I would have thought the fill point on the gas bottle would be a non return valve.
My fill hose has no valves in it. But mine is Alugas.

 

[7735]

There isn’t a non return valve on mine because I tried to disconnect the filler pipe from the bottle and gas immediately leaked.

spongy

 

[chaser]

There isn’t a non return valve on mine because I tried to disconnect the filler pipe from the bottle and gas immediately leaked.

spongy

Probably a bit left in from filling, but if it is definitely coming out of the bottle you have something wrong.

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[tonyidle]

There isn’t a non return valve on mine because I tried to disconnect the filler pipe from the bottle and gas immediately leaked.

spongy

The filler pipe has one-way valves on both ends and can be removed without any danger of the bottle emptying. It is however full of gas under cylinder pressure and will vent as soon as a fitting is loosened. This is only the quantity trapped in the filler hose so once it has vented no more will come out.

 

[SpeedyDux]

Do you really need to leave the gas bottle turned on while travelling?

 

[wolfie2]

There isn’t a non return valve on mine because I tried to disconnect the filler pipe from the bottle and gas immediately leaked.

spongy

Isn't this the same as the "psssh" that you get when the pump is disconnected. If there isn't a NRV then you would never be able to remove a partially filled bottle.

 

[Lenny HB]

There isn’t a non return valve on mine because I tried to disconnect the filler pipe from the bottle and gas immediately leaked.

spongy

The filling pressure is around 140psi and with the non-return valve at both ends the pipe will be full of liquid LPG at high pressure that's a hell of a lot of gas when you release it.

 

[Happy1]

Bottle has a non return valve as has filler point, both of mine failed at same time but easily fixed at a repairer probably not a diy fix!

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[hymerman]

I have 2 bottles but never travel with them turned on.

 

[Reallyretired]

Definitely non return valve at both end, but filling pipes hold quite a lot of liquified gas at high pressure, so may look like your bottle is leaking.

 

[chrisinplymouth]

I thought the non return was in the bottle not the hose.

 

[Minxy]

The bottle won't vent off if there is an issue with the filler pipe as the inlet on the bottle has an NRV (as has the filler end of the filler pipe) so if the filler pipe became disconnected/loose where it is attached to the bottle the only gas that would escape is that in the hose which seems like a lot but isn't really - I know this from when I've moved my bottles from one MH/camper to another and have sometimes had to remove the filler pipe from the bottle in the process.

 

[dunnah01]

Don't forget that venting will freeze and seal the majority of pipe leaks in an accident and the tanks are immensely strong so no huge fire risk. The problems start when heat from any other fire causes the liquid in the cylinder to heat and expand, leading to possible cylinder rupture and real fireworks. This is where the emergency services concentrate their efforts to keep cylinder temperatures down by hosing them with water.

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[7735]

Don't forget that venting will freeze and seal the majority of pipe leaks in an accident and the tanks are immensely strong so no huge fire risk. The problems start when heat from any other fire causes the liquid in the cylinder to heat and expand, leading to possible cylinder rupture and real fireworks. This is where the emergency services concentrate their efforts to keep cylinder temperatures down by hosing them with water.

Thanks for all your replies, I hadn’t considered the point that there is high pressure gas in the pipe.

spongy

 

[Martist]

This thread is two years old but nevertheless I found it useful today. As I started to loosen the nut on the cylinder end of the filler pipe gas wooshed out and formed ice. I hurriedly tightened it back up. I imagined that perhaps my non-return valve was faulty. But after reading this thread, about gas being in the pipe under pressure, I loosened the nut again - this time slowly. When gas started escaping I stopped loosening it and just let the gas come out slowly. And then it stopped and I happily disconnected the pipe.