code/modules/plumbing/plumbers/_plumb_reagents.dm 
| /datum/reagents/plumbing | Specialized reagent container for plumbing. Uses the round robin approach of transferring reagents so transfer 5 from 15 water, 15 sugar and 15 plasma becomes 10, 15, 15 instead of 13.3333, 13.3333 13.3333. Good if you hate floating point errors |
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| /datum/reagents/plumbing/reaction_chamber | Excludes catalysts during the emptying process |