I am running COR-20 on each of my returns, 2 total.
The plumbing on this tank is 1.25", but the problem is the bulkhead on my sump is 1". Should I go from 1.25" on the COR and reduce for the 1" bulkhead then it goes back to 1.25" or just keep it at 1" from the COR-20 to the bulkhead?
Thanks
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