Skip to main content

802 Prescriptive Path

Above Green
  • Updated

802.1 - Indoor hot water usage

Indoor hot water supply system is in accordance with one of the practices listed in items (1) through (5). The maximum water volume from the source of hot water to the termination of the fixture supply is determined in accordance with Tables 11.802.1(1) or11. 802.1(2). The maximum pipe length from the source of hot water to the termination of the fixture supply is 50 feet.

[Where more than one water heater is used or where more than one type of hot water supply system, including multiple circulation loops, is used, points are awarded only for the system that qualifies for the minimum number of points.]

[Systems with circulation loops are eligible for points only if pumps are demand controlled. Circulation systems with timers or aquastats and constant-on circulation systems are not eligible to receive points.]

[Points awarded only if the pipes are insulated in accordance with Section 705.6.3.]

  1. The maximum volume from the water heater to the termination of the fixture supply at furthest fixture is 128 ounces (1 gallon or 3.78 liters). (8 points)

  2. The maximum volume from the water heater to the termination of the fixture supply at furthest fixture is 64 ounces (0.5 gallon or 1.89 liters). (12 points)

  3. The maximum volume from the water heater to the termination of the fixture supply at furthest fixture is 32 ounces (0.25 gallon or 0.945 liters). (20 points)

  4. A demand controlled hot water priming pump is installed on the main supply pipe of the circulation loop and the maximum volume from this supply pipe to the furthest fixture is 24 ounces (0.19 gallons or 0.71 liters). (24 points)

    1. The volume in the circulation loop (supply) from the water heater or boiler to the branch for the furthest fixture is no more than 128 ounces (1 gallon or 3.78 liters). (4 additional points)

  5. A central hot water recirculation system is implemented in multifamily buildings in which the hot water line distance from the recirculating loop to the engineered parallel piping system (i.e., manifold system) is less than 30 feet (9,144 mm) and the parallel piping to the fixture fittings contains a maximum of 64 ounces (1.89 liters) (115.50 cubic inches) (0.50 gallons). (9 points)

  6. Tankless water heater(s) with at least 0.5 gallon (1.89 liters) of storage are installed, or a tankless water heater that ramps up to at least 110F within 5 seconds is installed. The storage may be internal or external to the tankless water heater. (4 additional points)

Required Documentation

Calculation showing maximum amount of water in the piping between heater and any fixture.

802.2 - Water-conserving appliances

Energy Star or equivalent water-conserving appliances are installed.

  1. dishwasher (2 points)
  2. clothes washer, or (13 points)
  3. clothes washer with an integrated Water Factor of 3.8 or less (18 points)

Note: Washing machines are installed in individual units or provided in common areas of multifamily buildings.

Required Documentation

For products to comply, it is not enough solely to have an ENERGY STAR label. The product must meet the ENERGY STAR product specifications in Chapter 14 REFERENCED DOCUMENTS. Verifiers must ensure that the products/appliances installed meet the program performance criteria.

802.3 - Water usage metering

Water meters are installed meeting the following:

[Points earned in Section 11.802.3(2) shall not exceed 50% of the total points earned for the Indoor and Outdoor Water Use Category]

  • Where not otherwise required by the local AHJ, installation of a meter for water consumed from any source associated with the building or building site. (2 points per unique use meter)

  • Each water meter shall be capable of communicating water consumption data remotely for the dwelling unit occupant and be capable of providing daily data with electronic data storage and reporting capability that can produce reports for daily, monthly, and yearly water consumption. (Fire sprinkler systems are not required to be metered). (2 points per sensor package)

Required Documentation 

Building plans.

802.4 - Showerheads

Showerheads are in accordance with the following:

  • The total maximum combined flow rate of all showerheads in a shower compartment with floor area of 2600 square inches or less is equal or less than 2.0 gpm. For each additional 1300 square inches or any portion thereof of shower compartment floor area, an additional 2.0 gpm combined showerhead flow rate is allowed. Showerheads shall comply with ASME A112.18.1/CSA B125.1 and shall meet the performance criteria of the U.S. EPA WaterSense Specification for showerheads. Showerheads shall be served by an automatic compensating valve that complies with ASSE 1016/ASME A112.1016/CSA B125.16 or ASME A112.18.1/CSA B125.1 and specifically designed to provide thermal shock and scald protection at the flow rate of the showerhead.

    [Points awarded per shower compartment; 7 max. In multifamily buildings, the average of the points assigned to individual dwelling units or sleeping units may be used as the number of points awarded for this practice, rounded to the nearest whole number.]

  • All shower compartments in the dwelling unit(s) or sleeping unit(s) and common areas meet the requirements of 11.802.3(1) and all showerheads are in accordance with one of the following:

    • maximum of 1.8 gpm (6 additional)

    • maximum of 1.5 gpm (10 additional)

  • Any shower control that can shut off water flow without affecting temperature is installed. [1 points awarded per shower control; 3 max.]

    For SI: 1 gallon per minute = 3.785 L/m

Required Documentation

Manufacturer’s specifications showing compliance.

802.5 - Faucets

802.5.1 

Install water-efficient lavatory faucets with flow rates not more than 1.5 gpm (5.7 L/min), tested in compliance with ASME A112.18.1/CSA B125.1 and meeting the performance criteria of the EPA WaterSense High-Efficiency Lavatory Faucet Specification:

  1. Flow rate ≤ 1.5 gpm [*all faucets in a bathroom are in compliance]

    [1 points awarded for each bathroom; 3 max. In multifamily buildings, the average of the points assigned to individual dwelling units or sleeping units may be used as the number of points awarded for this practice, rounded to the nearest whole number.]

  2. Flow rate ≤ 1.20 gpm [*all faucets in a bathroom are in compliance] (2 points; 6 max)

  3. Flow rate ≤ 1.5 gpm for all lavatory faucets in the dwelling unit(s) or sleeping unit(s) (6 additional points)

  4. Flow rate ≤ 1.5 gpm for all lavatory faucets in the dwelling unit(s), and at least one bathroom has faucets with flow rates ≤ 1.20 gpm (8 additional points)

  5. Flow rate ≤ 1.20 gpm for all lavatory faucets in the dwelling unit(s) (12 additional points)

Required Documentation

Manufacturer’s specifications showing compliance.

802.5.2

Water-efficient residential kitchen faucets are installed in accordance with ASME A112.18.1/CSA B125.1. Residential kitchen faucets may temporarily increase the flow above the maximum rate but not to exceed 2.2 gpm.

  1. All residential kitchen faucets have a maximum flow rate of 1.8 gpm. (3 points)

  2. All residential kitchen faucets have a maximum flow rate of 1.5 gpm. (1 additional point)

Required Documentation

Manufacturer’s specifications showing compliance.

802.5.3 

Self-closing valve, motion sensor, metering, or pedal-activated faucet is installed to enable intermittent on/off operation. [1 points awarded per fixture; 3 max.]

802.5.4 - Water closets and urinals

Water closets and urinals are in accordance with the following:

  1. Gold and emerald levels: All water closets and urinals are in accordance with Section 802.5.4. (not available)

  2. A water closet is installed with an effective flush volume of 1.28 gallons (4.85 L) or less in accordance with ASME A112.19.2/CSA B45.1 or ASME A112.19.14 as applicable. Tank-type water closets shall be in accordance with the performance criteria of the U.S. EPA WaterSense Specification for Tank-Type Toilets 

    [2 points awarded per fixture; 6 max. In multifamily buildings, the average of the points assigned to individual dwelling units or sleeping units may be used as the number of points awarded for this practice, rounded to the nearest whole number.]

  3. All water closets are in accordance with Section 802.5(2).  (11 additional point)

  4. All water closets are in accordance with Section 802.5(2) and one or more of the following are installed:

    1. Water closets that have an effective flush volume of 1.2 gallons or less. (1 additional point; 3 max)

      [Points awarded per toilet. In multifamily buildings, the average of the points assigned to individual dwelling units or sleeping units may be used as the number of points awarded for this practice, rounded to the nearest whole number.]

    2. One or more urinals with a flush volume of 0.5 gallons (1.9L) or less when tested in accordance with ASME A112.19.2/CSA B45.1. (1 additional point)

    3. One or more composting or waterless toilets and/or nonwater urinals. Nonwater urinals shall be tested in accordance with ASME A112.19.2/CSA B45.1. (6 additional points)

Required Documentation

Manufacturer’s specifications or literature.

802.6 - Irrigation systems

Required Documentation

Review irrigation plan and confirm prepared by qualified professional.

802.6.1 

Where an irrigation system is installed, an irrigation plan and implementation are executed by a qualified professional or equivalent. (MANDATORY)

802.6.2

Irrigation sprinkler nozzles shall be tested according to ANSI standard ASABE/ICC 802-2014 Landscape Irrigation Sprinkler and Emitter Standard by an accredited third party laboratory. (6 points)

Required Documentation

Manufacturer’s literature.

802.6.3

Drip irrigation is installed.

  1. Drip irrigation is installed for all landscape beds. (4 points)

  2. Subsurface drip is installed for all turf grass areas. (4 points)

  3. Drip irrigation zones specifications show plant type by name and water use/need for each emitter [Points awarded only if specifications are implemented.] (5 points)

Required Documentation

Nozzle performance test results by an accredited third-party laboratory and results are posted on Smart Water Application Technologies (https://www.epa.gov/watersense/water-budget-tool) website or similar.

802.6.4

The irrigation system(s) is controlled by a smart controller or no irrigation is installed. [Points are not additive.]

  1. Irrigation controllers shall be in accordance with the performance criteria of the EPA WaterSense program  (10 points)

  2. No irrigation is installed and a landscape plan is developed in accordance with Section 503.5, as applicable. (15 points)

Required Documentation

Plan and statement from WaterSense professional indicating compliance.

802.6.5 - Commissioning and water use reduction for irrigation systems

[Points are not additive per each section.]

  1. All irrigation zones utilize pressure regulation so emission devices (sprinklers and drip emitters) operate at manufacturer’s recommended operating pressure. (3 points)

  2. Where dripline tubing is installed, a filter with mesh size in accordance with the manufacturer’s recommendation is installed on all drip zones. (3 points)

  3. Utilize spray bodies that incorporate an in-stem or external flow shut-off device. (3 points)

  4. For irrigation systems installed on sloped sites, either an in-stem or external check valve is utilized for each spray body. (3 points)

  5. Where an irrigation system is installed, a flow sensing device is installed to monitor and alert the controller when flows are outside design range. (3 points)

Required Documentation

Written report from a qualified water commissioning agent that the irrigation system meets any of the above practices.

802.7 - Rainwater collection and distribution 

Rainwater collection and distribution is provided.

802.7.1 

Rainwater is used for irrigation in accordance with one of the following:

  1. Rainwater is diverted for landscape irrigation without impermeable water storage (5 points)

  2. Rainwater is diverted for landscape irrigation with impermeable water storage in accordance with one of the following:

    1. 50 – 499 gallon storage capacity (5 points)

    2. 500-2499 gallon storage capacity (10 points)

    3. 2500 gallon or larger storage capacity (system is designed by a professional certified by The American Rainwater Catchment Systems Association or equivalent) (15 points)

    4. All irrigation demands are met by rainwater capture (documentation demonstrating the water needs of the landscape is provided and the system is designed by a professional certified by The American Rainwater Catchment Systems Association or equivalent). (25 points)

Required Documentation 

Building and/or site plan.

802.7.2

Rainwater is used for indoor domestic demand as follows. The system is designed by a professional certified by The American Rainwater Catchment Systems Association or equivalent.

  1. Rainwater is used to supply an indoor appliance or fixture for any locally approved use. (5 points awarded per appliance or fixture; 15 max) 

  2. Rainwater provides for total domestic demand. Where rainwater is used as potable water the potable rainwater system shall meet the requirements of IRC Sections P2906 and Section P2912. (25 points)

    The following shall also apply:

    1. The following roof materials shall not be used to collect rainwater: shingles with fire retardant, copper, and materials that contain asbestos. Materials that contain lead, including but not limited to flashings and roof jacks, shall be prohibited.

    2. Potable water supplies shall be protected against cross connection with rainwater as specified in IRC Section P2902.1.

    3. Disinfection shall be provided by at least one of the following:

      1. Ultraviolet (UV) light providing at least 40 mJ/cm2 at 254 nm for the highest water flow rate. A UV sensor with visible alarm, audible alarm, or water shutoff shall be triggered when the UV light is below the minimum at the sensor. In addition filtration no greater than 5 µm shall be located upstream of the UV light or

      2. filtration no greater than 0.2 µm, or

      3. other approved disinfection

    4. Materials and systems that collect, convey, pump, or store rainwater for potable rainwater systems shall comply with NSF 53, NSF 61 or equivalent.

    5. The quality of the water at the point of use shall be verified in accordance with the requirements of the jurisdiction.

    6. The rainwater storage shall not admit sunlight.

    7. Potable rainwater pipe shall not be required to be purple after the point that the water is disinfected.

802.8 - Sediment filters

Water filter is installed to reduce sediment and protect plumbing fixtures for the whole building or the entire dwelling unit or the sleeping unit. (1 point)

802.9 - Water treatment devices

802.9.1

Water Softeners shall not be installed where the supplied water hardness is less than 8.0 grains per gallon measured as total calcium carbonate equivalents. Water softeners shall be listed to NSF 44 and a rated salt efficiency of 3400 grains of total hardness per 1.0 pound of salt based on sodium chloride equivalency. Devices shall not discharge more than 4.0 gallons of water per 1000 grains of hardness removed during the service or recharge cycle.

  1. No water softener (5 points)
  2. Water softener installed to supply softened water only to domestic water heater. (2 points)

Required Documents

Building plans.

802.9.2

Reverse Osmosis (R/O) water treatment systems shall be listed to NSF 58 and shall include automatic shut-off valve to prevent water discharge when storage tank is full.

  1. No R/O system. (3 points)

  2. Combined capacity of all R/O systems does not exceed 0.75 gallons. (1 point)

Required Documentation

Manufacturer’s specifications.

802.10 - Pools and spas

802.10.1 

Pools and Spas with water surface area greater than 36 square feet and connected to a water supply shall have a dedicated meter to measure the amount of water supplied to the pool or spa.

  1. Automated motorized non-permeable pool cover that covers the entire pool surface. (10 points)

© 2020 Home Innovation Research Labs, Inc. All rights reserved.

 

Comments

0 comments

Please sign in to leave a comment.