... , 20L/min (25 centigrade temperature rising); Gas Source: LPG, NG, Town Gas Rated gas pressure: 2800 Pa (LPG), ... Advantages: Two power systems for choice Water-gas linked automatic control, easy operation; Model ... 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 ...