... min, 8 L/min, 9 L/min, 10 L/min, 12L/min, 16L/min, 20L/min (25 centigrade temperature rising); ... 9 l/min - 12 l/min: 110 mm; 12L/min - 20L/min: 140mm Water pressure: 0.015 - 0.8 MPa Diameter of ... avoid accident. Water over high pressure protection device; Over freezing protection device; Super low water pressure starting design Gas Water Heater, Instant Tankless Water Heater, Natural Gas Water Heater