NRS 338.193
Standards for plumbing fixtures.
1.
Each public building sponsored or financed by a public body must meet the standards made applicable for the building pursuant to this section.2.
Except as otherwise provided in subsections 3 and 4, each public building, other than a prison or jail, on which construction begins on or after March 1, 1992, and each existing public building which is expanded or renovated on or after March 1, 1992, must incorporate the following minimal standards for plumbing fixtures:(a)
A toilet which uses water must not be installed unless its consumption of water does not exceed 3.5 gallons of water per flush.(b)
A shower apparatus which uses more than 3 gallons of water per minute must not be installed unless it is equipped with a device to reduce water consumption to 3 gallons of water or less per minute.(c)
Each faucet installed in a lavatory or kitchen must not allow water to flow at a rate greater than 3 gallons per minute.(d)
A toilet or urinal which employs a timing device or other mechanism to flush periodically irrespective of demand must not be installed.3.
Except as otherwise provided in subsection 4, each public building, other than a prison or jail, on which construction begins on or after March 1, 1993, and each existing public building which is expanded or renovated on or after March 1, 1993, must incorporate the following minimal standards for plumbing fixtures:(a)
A toilet which uses water must not be installed unless its consumption of water does not exceed 1.6 gallons of water per flush.(b)
A shower apparatus which uses more than 2.5 gallons of water per minute must not be installed unless it is equipped with a device to reduce water consumption to 2.5 gallons of water or less per minute.(c)
A urinal which uses water must not be installed unless its consumption of water does not exceed 1 gallon of water per flush.(d)
A toilet or urinal which employs a timing device or other mechanism to flush periodically, irrespective of demand, must not be installed.(e)
A urinal which continually flows or flushes water must not be installed.(f)
Each faucet installed in a lavatory or kitchen must not allow water to flow at a rate greater than 2.5 gallons per minute.(g)
Each faucet installed in a public restroom must contain a mechanism which closes the faucet automatically after a predetermined amount of water has flowed through the faucet. Multiple faucets that are activated from a single point must not be installed.4.
The requirements of this section for the installation of certain plumbing fixtures do not apply to any portion of an existing public building which is not being expanded or renovated.
Source:
Section 338.193 — Standards for plumbing fixtures., https://www.leg.state.nv.us/NRS/NRS-338.html#NRS338Sec193.