Delete "or showers" from the sentence "Newly installed aerators or flow restrictors added to private lavatories or showers must be WaterSense labeled.”
LEEDuser’s viewpoint
Frank advice from LEED experts
LEED is changing all the time, and every project is unique. Even seasoned professionals can miss a critical detail and lose a credit or even a prerequisite at the last minute. Our expert advice guides our LEEDuser Premium members and saves you valuable time.
Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Building Water Use
For the fixtures and fittings listed in Table 1, as applicable to the project scope, reduce aggregate water consumption by 20% from the baseline. Base calculations on the volumes and flow rates shown in Table 1. All newly installed toilets, urinals, private lavatory faucets, and showerheads that are eligible for labeling must be WaterSense labeled (or a local equivalent for projects outside the U.S.).Table 1. Baseline water consumption of fixtures and fittings
Commercial Fixtures, Fittings, and Appliances | Current Baseline (IP Units) | Current Baseline (SI units) |
---|---|---|
Water closets (toilets)* | 1.6 gallons per flush (gpf) | 6 liters per flush (lpf) |
Urinal* | 1.0 (gpf) | 3.8 lpf |
Public lavatory (restroom) faucet | 0.5 gpm at 60 psi all others except private applications | 1.9 lpm at 415 kPa, all others except private applications |
Private lavatory faucet* | 2.2 gpm at 60 psi | 8.3 lpm at 415 kPa |
Kitchen faucet (excluding faucets used exclusively for filling operations) | 2.2 gpm at 60 psi | 8.3 lpm at 415 kPa |
Showerhead* | 2.5 gpm at 80 psi per shower stall | 9.5 lpm at 550 kPa per shower stall |
* WaterSense label available for this product type gpf = gallons per flush gpm = gallons per minute psi = pounds per square inch lpf = liters per flush lpm = liters per minute kPa = kilopascals |
Appliance and process water use
Install appliances, equipment, and processes within the project scope that meet the requirements listed in the tables below .Table 2. Standards for appliances
Appliance | Requirement |
---|---|
Residential clothes washers | ENERGY STAR or performance equivalent |
Commercial clothes washers | CEE Tier 3A |
Residential dishwashers (standard and compact) | ENERGY STAR or performance equivalent |
Prerinse spray valves | ≤ 1.3 gpm (4.9 lpm) |
Ice machine | ENERGY STAR or performance equivalent and use either air-cooled or closed-loop cooling, such as chilled or condenser water system |
lpm = liters per minute
Table 3. Standards for processes
Process | Requirement |
---|---|
Heat rejection and cooling | No once-through cooling with potable water for any equipment or appliances that reject heat |
Cooling towers and evaporative condensers | Equip with:
|
Table 4. Standards for appliances
Kitchen equipment | Requirement (IP units) | Requirement (SI units) | |
---|---|---|---|
Dishwasher | Undercounter | ≤ 1.6 gal/rack | ≤ 6.0 liters/rack |
Stationary, single tank, door | ≤ 1.4 gal/rack | ≤ 5.3 liters/rack | |
Single tank, conveyor | ≤ 1.0 gal/rack | ≤ 3.8 liters/rack | |
Multiple tank, conveyor | ≤ 0.9 gal/rack | ≤ 3.4liters/rack | |
Flight machine | ≤ 180 gal/hour | ≤ 680 liters/hour | |
Food steamer | Batch | ≤ 6 gal/hour/pan | ≤ 23 liters/hour/pan |
Cook-to-order | ≤ 10 gal/hour/pan | ≤ 38 liters/hour/pan | |
Combination oven | Countertop or stand | ≤ 3.5 gal/hour/pan | ≤ 13 liters/hour/pan |
Roll-in | ≤ 3.5 gal/hour/pan | ≤ 13 liters/hour/pan |
Table 5. Standards for processes
Process | Requirement |
---|---|
Discharge water temperature tempering | Where local requirements limit discharge temperature of fluids into drainage system, use tempering device that runs water only when equipment discharges hot water OR Provide thermal recovery heat exchanger that cools drained discharge water below code-required maximum discharge temperatures while simultaneously preheating inlet makeup water OR If fluid is steam condensate, return it to boiler |
Venturi-type flow-through vacuum generators or aspirators | Use no device that generates vacuum by means of water flow through device into drain |
What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
Is the WaterSense label really required, even if a non-labeled fixture has a comparable flush or flow rate? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Not all fixture types can get the WaterSense label. Which fixtures do we need to ensure have the WaterSense label for our project? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
How does the CEE Tier 3A criteria for commercial clothes washers compare to ENERGY STAR certified washers? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Addenda
Delete "or showers" from the sentence "Newly installed aerators or flow restrictors added to private lavatories or showers must be WaterSense labeled.”
In the related “International Water Labeling Programs” Guidance Document (http://www.usgbc.org/resources/international-water-labeling-programs), edit the note at the bottom of the document to read:
“Note: countries without a listed labeling program must meet the flush and flow requirements of “Table 6. Maximum installed flush or flow rates for prescriptive path” listed in the Step-by-Step Guidance section of the LEED Reference Guide.
“Projects served by water supply pressures different than specified in LEED v4 may install pressure compensating aerators in flow fixtures to achieve the desired flow rate without compromising user satisfaction.”
Under Step 4. Select High-Efficiency Appliances, add the following content after the sentence that begins "ENERGY STAR may not be readily available in all areas": "Existing appliances intended for reuse in the project are not required to meet the requirements in Table 2. Standards for appliances"
Under Step 5. Design Process Water Systems, add the following content after the sentence that begins "Where applicable, select and design appliances and equipment": "Existing equipment intended for reuse in the project is not required to meet the requirements in Table 3. Standards for processes."
BD+C reference guide, STEP-BY-STEP GUIDANCE section:
Under Step 4. Select High-Efficiency Appliances, add the following content after the sentence that begins "Select appliances that meet the labeling or performance requirements":
"Existing appliances intended for reuse in the project are not required to meet the requirements in Table 2. Standards for appliances"
Under Step 5. Design Process Water Systems, add the following content after the sentence that begins "Where applicable, select and design appliances and equipment": "Existing equipment intended for reuse in the project is not required to meet the requirements in Table 3. Standards for processes."
O+M reference guide: Revise the Group Approach section to read: "Eligible. The percentage reduction can be based on the total combined water use reduction in all LEED project buildings. The baseline adjustment for year of substantial system completion should be averaged based on all plumbing fixtures in all buildings. If nonpotable water systems will be shared by multiple projects, ensure adequate supply to meet the demands of all projects using nonpotable water. The nonpotable water may not be double-counted among projects. Submit separate documentation for each building, as required for WE Prerequisite Indoor Water Use Reduction. "
Change the last sentence to read: “A plumbing fixture schedule is acceptable, provided it contains the fixture manufacturer, model, flush or flow rate information, and the WaterSense designation where applicable.”
Additions
For credit compliance, include in the credit documentation all plumbing fixtures necessary to meet the occupants’ needs whether they will be installed as part of the project’s scope of work or not. Include at a minimum all necessary restroom fixtures (toilets, urinals, and lavatories) to meet the project occupants’ needs, and showers when seeking LT Credit Bicycle Facilities. The WaterSense label requirement does not apply to fixtures that are outside of the scope of the LEED project.
Added Neighborhood Development calculations
Add "treated seawater" to the list of acceptable alternative water sources, behind stormwater.
Can automated-maintenance urinals be considered "waterless" for the purposes of WE prerequisite and credit Indoor Water Use Reduction?
Yes, automated maintenance urinals with water use not to exceed 150 gallons (568 liters) annually can be considered as waterless urinals for the purposes of credit achievement calculations in LEED v4 WE prerequisite and credit Indoor Water Use Reduction. Do not include the volume of water used by these urinals in the LEED v4 Indoor Water Use Calculator (they can be excluded, or considered to have a water use of 0 gallons/liters). Projects must also submit manufacturer documentation showing the annual volume of water used by the urinals.
Documentation toolkit
The motherlode of cheat sheets
LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.
Get the inside scoop
Our editors have written a detailed analysis of nearly every LEED credit, and LEEDuser premium members get full access. We’ll tell you whether the credit is easy to accomplish or better left alone, and we provide insider tips on how to document it successfully.
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Building Water Use
For the fixtures and fittings listed in Table 1, as applicable to the project scope, reduce aggregate water consumption by 20% from the baseline. Base calculations on the volumes and flow rates shown in Table 1. All newly installed toilets, urinals, private lavatory faucets, and showerheads that are eligible for labeling must be WaterSense labeled (or a local equivalent for projects outside the U.S.).Table 1. Baseline water consumption of fixtures and fittings
Commercial Fixtures, Fittings, and Appliances | Current Baseline (IP Units) | Current Baseline (SI units) |
---|---|---|
Water closets (toilets)* | 1.6 gallons per flush (gpf) | 6 liters per flush (lpf) |
Urinal* | 1.0 (gpf) | 3.8 lpf |
Public lavatory (restroom) faucet | 0.5 gpm at 60 psi all others except private applications | 1.9 lpm at 415 kPa, all others except private applications |
Private lavatory faucet* | 2.2 gpm at 60 psi | 8.3 lpm at 415 kPa |
Kitchen faucet (excluding faucets used exclusively for filling operations) | 2.2 gpm at 60 psi | 8.3 lpm at 415 kPa |
Showerhead* | 2.5 gpm at 80 psi per shower stall | 9.5 lpm at 550 kPa per shower stall |
* WaterSense label available for this product type gpf = gallons per flush gpm = gallons per minute psi = pounds per square inch lpf = liters per flush lpm = liters per minute kPa = kilopascals |
Appliance and process water use
Install appliances, equipment, and processes within the project scope that meet the requirements listed in the tables below .Table 2. Standards for appliances
Appliance | Requirement |
---|---|
Residential clothes washers | ENERGY STAR or performance equivalent |
Commercial clothes washers | CEE Tier 3A |
Residential dishwashers (standard and compact) | ENERGY STAR or performance equivalent |
Prerinse spray valves | ≤ 1.3 gpm (4.9 lpm) |
Ice machine | ENERGY STAR or performance equivalent and use either air-cooled or closed-loop cooling, such as chilled or condenser water system |
lpm = liters per minute
Table 3. Standards for processes
Process | Requirement |
---|---|
Heat rejection and cooling | No once-through cooling with potable water for any equipment or appliances that reject heat |
Cooling towers and evaporative condensers | Equip with:
|
Table 4. Standards for appliances
Kitchen equipment | Requirement (IP units) | Requirement (SI units) | |
---|---|---|---|
Dishwasher | Undercounter | ≤ 1.6 gal/rack | ≤ 6.0 liters/rack |
Stationary, single tank, door | ≤ 1.4 gal/rack | ≤ 5.3 liters/rack | |
Single tank, conveyor | ≤ 1.0 gal/rack | ≤ 3.8 liters/rack | |
Multiple tank, conveyor | ≤ 0.9 gal/rack | ≤ 3.4liters/rack | |
Flight machine | ≤ 180 gal/hour | ≤ 680 liters/hour | |
Food steamer | Batch | ≤ 6 gal/hour/pan | ≤ 23 liters/hour/pan |
Cook-to-order | ≤ 10 gal/hour/pan | ≤ 38 liters/hour/pan | |
Combination oven | Countertop or stand | ≤ 3.5 gal/hour/pan | ≤ 13 liters/hour/pan |
Roll-in | ≤ 3.5 gal/hour/pan | ≤ 13 liters/hour/pan |
Table 5. Standards for processes
Process | Requirement |
---|---|
Discharge water temperature tempering | Where local requirements limit discharge temperature of fluids into drainage system, use tempering device that runs water only when equipment discharges hot water OR Provide thermal recovery heat exchanger that cools drained discharge water below code-required maximum discharge temperatures while simultaneously preheating inlet makeup water OR If fluid is steam condensate, return it to boiler |
Venturi-type flow-through vacuum generators or aspirators | Use no device that generates vacuum by means of water flow through device into drain |
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:
- Calculators to help assess credit compliance.
- Tracking spreadsheets for materials purchases.
- Spreadsheets and forms to give to subs and other team members.
- Guidance documents on arcane LEED issues.
- Sample templates to help guide your narratives and LEED Online submissions.
- Examples of actual submissions from certified LEED projects.
Is the WaterSense label really required, even if a non-labeled fixture has a comparable flush or flow rate? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Not all fixture types can get the WaterSense label. Which fixtures do we need to ensure have the WaterSense label for our project? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
How does the CEE Tier 3A criteria for commercial clothes washers compare to ENERGY STAR certified washers? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Delete "or showers" from the sentence "Newly installed aerators or flow restrictors added to private lavatories or showers must be WaterSense labeled.”
In the related “International Water Labeling Programs” Guidance Document (http://www.usgbc.org/resources/international-water-labeling-programs), edit the note at the bottom of the document to read:
“Note: countries without a listed labeling program must meet the flush and flow requirements of “Table 6. Maximum installed flush or flow rates for prescriptive path” listed in the Step-by-Step Guidance section of the LEED Reference Guide.
“Projects served by water supply pressures different than specified in LEED v4 may install pressure compensating aerators in flow fixtures to achieve the desired flow rate without compromising user satisfaction.”
Under Step 4. Select High-Efficiency Appliances, add the following content after the sentence that begins "ENERGY STAR may not be readily available in all areas": "Existing appliances intended for reuse in the project are not required to meet the requirements in Table 2. Standards for appliances"
Under Step 5. Design Process Water Systems, add the following content after the sentence that begins "Where applicable, select and design appliances and equipment": "Existing equipment intended for reuse in the project is not required to meet the requirements in Table 3. Standards for processes."
BD+C reference guide, STEP-BY-STEP GUIDANCE section:
Under Step 4. Select High-Efficiency Appliances, add the following content after the sentence that begins "Select appliances that meet the labeling or performance requirements":
"Existing appliances intended for reuse in the project are not required to meet the requirements in Table 2. Standards for appliances"
Under Step 5. Design Process Water Systems, add the following content after the sentence that begins "Where applicable, select and design appliances and equipment": "Existing equipment intended for reuse in the project is not required to meet the requirements in Table 3. Standards for processes."
O+M reference guide: Revise the Group Approach section to read: "Eligible. The percentage reduction can be based on the total combined water use reduction in all LEED project buildings. The baseline adjustment for year of substantial system completion should be averaged based on all plumbing fixtures in all buildings. If nonpotable water systems will be shared by multiple projects, ensure adequate supply to meet the demands of all projects using nonpotable water. The nonpotable water may not be double-counted among projects. Submit separate documentation for each building, as required for WE Prerequisite Indoor Water Use Reduction. "
Change the last sentence to read: “A plumbing fixture schedule is acceptable, provided it contains the fixture manufacturer, model, flush or flow rate information, and the WaterSense designation where applicable.”
Additions
For credit compliance, include in the credit documentation all plumbing fixtures necessary to meet the occupants’ needs whether they will be installed as part of the project’s scope of work or not. Include at a minimum all necessary restroom fixtures (toilets, urinals, and lavatories) to meet the project occupants’ needs, and showers when seeking LT Credit Bicycle Facilities. The WaterSense label requirement does not apply to fixtures that are outside of the scope of the LEED project.
Added Neighborhood Development calculations
Add "treated seawater" to the list of acceptable alternative water sources, behind stormwater.
Can automated-maintenance urinals be considered "waterless" for the purposes of WE prerequisite and credit Indoor Water Use Reduction?
Yes, automated maintenance urinals with water use not to exceed 150 gallons (568 liters) annually can be considered as waterless urinals for the purposes of credit achievement calculations in LEED v4 WE prerequisite and credit Indoor Water Use Reduction. Do not include the volume of water used by these urinals in the LEED v4 Indoor Water Use Calculator (they can be excluded, or considered to have a water use of 0 gallons/liters). Projects must also submit manufacturer documentation showing the annual volume of water used by the urinals.