I'm guessing when you say "pump drain at the convenience center" you are referring to the low point drains? The cold and hot lines that run out the bottom? They are only to drain any water in the lines of the rig for winterizing. It shouldn't drain your tank even with the pump running.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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