water; reuse; recycling; reduce; reliance; main; source; supply; tap; running; funnel; rainwater; harvesting; drain strainer; wastewater; grey water; treatment; freshwater; drop; household; use; consumption; efficient; beneficial; economic; sustainable; system; management; natural; resource; save; environment; conservation; vector; illustration; concept; outline; flat; graphic; design; icon; sign; symbol; abstract; infographic; background; isolated; element; word; blue –