by Jason Rose » Tue May 29, 2018 6:29 am
John Cole found this on the pipe from the Lava Pump House to the Lava Tank. This coupling changes the pipe from 3" to 4". He's assuming it's a check-valve, but would like to know for sure.
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Jason Rose
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Ferroequinearcheologist-in-Training
RioGrandeExplorations.net
Spring, Texas - MP 209.7 - UP Palestine Sub
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