Holding Tank Replacement

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by David P. Hornbach Plumbing 10 photos 4882 views

More to follow - the Holding tank is only 18 gallons and my goal is to replace it with at least 25 gallons capacity. IP indicates that the wall between the 2 compartments beneath the settee is not structural so the question is, can I fit a new tank in there that does not cost an arm and a leg?