Yep, that's a 1" bulkhead. Remember that the sizing is the interior dimension of the pipe at schedule 80. The outside dimension will be the size plus the thickness of the pipe walls. Schedule 40 pipe has the same nominal extirior dimension and a thinner wall (so its actually about 1 1/8" inside).
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I retired and got a fixed income but it's broke.
Ed
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50 gallon FOWLR, 10 gallon sump.
130 gallon reef, 20 gallon sump, 10 gallon refugium.
10 gallon quarantine.
60 gallon winter tank for pond fish.
300 gallon pond with waterfall.
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