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Originally Posted by dfkrug The tank bottom was interesting. It had two drain plugs, both of
brass with lead centers. The strange metalurgy must be to arrest any
electrolysis inside the tank. This tank dates back to 1929, according to
the earliest pressure test stamp on top.
This photo shows the bottom, along with some gussets I made from some
scrap tubing. These will support 3 casters. |
The "drain plugs" are the thermal safety valves.
If the tank gets hot, say in a fire, the lead melts releasing the propane preventing (normally) the tank from exploding.