2020 WEStand

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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