high quality s/s housing, instant heating. all copper pipe with different capacity options tankless, energy saving Capacity Options: 6L, ... , 16L/min, 20L/min (25 centigrade temperature rising); Gas Source: LPG, NG, Town Gas Rated gas pressure: 2800 Pa (LPG), 2000 Pa ( NG ... : 0.015 - 0.8 MPa Diameter of gas connector: LPG: 9.5mm, NG: 12-15mm Diameter of cold water connector: G1/2" Diameter ...