(1) Low investment, no pool, needless to disinfect.. (2) Compactness, small occupation, convenient to install (3) High efficiency and energy saving, low power expenditure and operating cost (4) Entire stainless flow passage, sanitation and free from secondary pollution (5) Stable water pressure, safe against pressure fluctuation to neighboring municipal network (6) High efficiency and unattended operation design (7) Super-strength protection: automatic display of malfunction and alarm (8) Mimic board man-machine interaction, inquiry, setting and parameter adjusting at any moment (9) Bypass design, automatic switchover, power cut without water off (10) Long life scale: high working efficient improves its service life by three times (11) It can be totally installed under ground, so it is quite suitable for place tension areas