Provides that the New York state uniform fire prevention and building code shall address standards requiring the use of a water demand calculator to determine pipe and fixture sizing for use in new construction and substantial renovations of single-family and multi-unit residential buildings; directs the chairperson of the state fire prevention and building code council to appoint an advisory board to monitor the use of water demand calculators in new construction and substantial renovations and to monitor and keep records of cost savings resulting from the use of such water demand calculators.
S T A T E O F N E W Y O R K
________________________________________________________________________
11488
I N A S S E M B L Y
May 28, 2026
___________
Introduced by COMMITTEE ON RULES -- (at request of M. of A. R. Carroll)
-- read once and referred to the Committee on Governmental Operations
AN ACT to amend the executive law, in relation to requiring the use of a
water demand calculator in new construction and substantial reno-
vations and establishing an advisory board to monitor such usage
THE PEOPLE OF THE STATE OF NEW YORK, REPRESENTED IN SENATE AND ASSEM-
BLY, DO ENACT AS FOLLOWS:
Section 1. Section 378 of the executive law is amended by adding a new
subdivision 21 to read as follows:
21. A. STANDARDS FOR THE USE OF A WATER DEMAND CALCULATOR IN NEW
CONSTRUCTION AND SUBSTANTIAL RENOVATIONS REQUIRING THAT:
(I) ALL PLUMBING SYSTEM DESIGNERS, ARCHITECTS, AND BUILDERS SHALL USE
A WATER DEMAND CALCULATOR TO DETERMINE PIPE AND FIXTURE SIZING FOR USE
IN ALL COVERED BUILDINGS;
(II) CALCULATIONS FOR PIPE AND FIXTURE SIZING BASED ON A WATER DEMAND
CALCULATOR SHALL BE SUBMITTED AS PART OF ANY CONSTRUCTION PERMIT APPLI-
CATION FOR A COVERED BUILDING;
(III) BUILDING PERMIT APPROVAL FOR COVERED BUILDINGS SHALL BE CONTIN-
GENT UPON VERIFIED USE OF A WATER DEMAND CALCULATOR; AND
(IV) FAILURE TO COMPLY WITH THE REQUIREMENTS OF THIS PARAGRAPH SHALL
RESULT IN DESIGN REJECTION OR DELAYED PERMITS FOR COVERED BUILDINGS.
B. THE COUNCIL SHALL BE AUTHORIZED TO CERTIFY WATER DEMAND CALCULATORS
DEEMED TECHNICALLY SOUND FOR USE IN COVERED BUILDINGS.
C. AS USED IN THIS SUBDIVISION, THE FOLLOWING TERMS SHALL HAVE THE
FOLLOWING MEANINGS:
(I) "WATER DEMAND CALCULATOR" SHALL MEAN AN ALGORITHM, SUCH AS THE
UNIFORM PLUMBING CODE APPENDIX M WATER DEMAND CALCULATOR, CERTIFIED
PURSUANT TO PARAGRAPH B OF THIS SUBDIVISION TO BE USED TO ESTIMATE THE
WATER DEMAND OF A BUILDING.
(II) "COVERED BUILDING" SHALL MEAN ANY NEW CONSTRUCTION OR SUBSTANTIAL
RENOVATION OF A SINGLE-FAMILY OR MULTI-UNIT RESIDENTIAL BUILDING.
(III) "SUBSTANTIAL RENOVATION" SHALL MEAN A PROJECT THAT INVOLVES THE
FULL REPLACEMENT OF A PLUMBING SYSTEM, SIGNIFICANT CHANGES TO EXISTING
PLUMBING SYSTEMS, AND RENOVATIONS OR CONVERSIONS THAT REQUIRE NEW PLUMB-
EXPLANATION--Matter in ITALICS (underscored) is new; matter in brackets
[ ] is old law to be omitted.
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