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411.2 Water Consumption
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Water closets shall have a maximum consumption not to exceed 1.6 gallons (6.0 Lpf) of water per flush.
Dual flush water closets shall comply with ASME A112.19.14. The effective flush volume for dual flush water closets shall be defined as the composite, average flush volume of two reduced flushes and one full flush.
Flushometer valve activated water closets shall have a maximum flush volume of 1.6 gallons (6.0 Lpf) of water per flush.
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