I think the theory is that if you 'only' have 1-1# bottle, or 2, in the house, when/if they blow up, they can't cause as much damage as a 20# tank in the house. I wouldn't keep any of them in the house. The 1# in to use and then back out into the cold. As far as just putting 2 1/2# pounds in the 20# tank, you still need to store it outside. I keep it sitting outside, run the hose out under the rubber door gasket to my tank with a quick connect. When done, disconnect and store the hose coiled by my torch.
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ESC
Soft glass on a Minor/concentrator since 1996
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