Adding Spigot to Roughneck

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I have a bulkhead at the bottom of a rubbermaid Brute container which I use for RO water, it is not leaking. I am not happy with the spigot attached past the bulkhead, I bought a pvc spigot with male hose thread, but the inside valve diameter is so restricted that flow is quite impaired, it takes a few minutes to fill up a 5 gallon bucket. I'm looking for a hose spigot that is reef safe has a male garden hose size thread and has a high flow-through rate if anyone has any suggestions.