... choice for heat pumpWork Condition:1)Refrigerant side (Between the tube and shell):R22,R134a,R404a,R407c,R410a,R600a,etc. Max ... pressure is 50 Bar.2)Water side (inside of the tube):Domestic water,tap water,antifreeze (glycol solution) Max working pressure ... -13793452645TEL: +86-534-2299957 FAX: +86-534-2299282http://www.brightaircon.com/ BRIGHT AIR CONDITIONING CO., LTD.Add:No.3379, ZHONGDA INDUSTRIAL ...