Key provisions of the 2020 WE∙Stand include:
- Water efficiency and conservation requirements
- IAPMO Water Demand Calculator™
- Alternate water sources for nonpotable applications such as gray water systems, reclaimed (recycled) water systems, and on-site treated nonpotable water systems
- Potable and nonpotable rainwater catchment systems
- Water heating design
- Non-sewered sanitation systems
- Recirculating shower systems
- Leak detection and control
- Plant irrigation systems
- Composting toilet and urine diversion systems
- On-site blackwater treatment systems
- On-site stormwater treatment systems
- Vacuum drainage systems
- References to industry standards addressing water treatment technologies
