Plumbing and Irrigation (PI)
The Plumbing and Irrigation section emphasizes the efficient use of potable water indoors and outdoors. An EarthCraft project aims to reduce water waste and storm water run-off. Strategies include drought adapted landscaping, improved plumbing distributions systems and efficient plumbing fixtures.
- PI1: High efficiency water heater (determined by Energy Factor; see chart below)
- PI2: Insulate 100% of hot water pipe with >R-3
- PI3: Heat trap on all storage water heaters
- PI4: Water pressure <60 PSI for fixtures
- PI5: WaterSense labeled toilets, showerheads, lavatory faucets and accessories (all must comply; details below)
- PI6: Irrigation system (details below)
- PI7: All pools or spas must have an appropriate cover
- PI8: Ornamental water features must recirculate water