User Manual
-14- 
cartridges, remove the old filters, then take the new filters out of the packaging, finally place the 
filters in the filter cartridges, using the filter wrench, tighten the filter cover. 
2. Replacing the 2
nd
 stage granular activated carbon filter 
First close the inlet water ball valve, using the filter cartridge wrench unscrew the 2
nd
 stage filter, 
remove the old filter, then take the new filter out of its packaging (the rubber pad on the filter does 
not need to be taken off), finally place the filter inside the filter cartridge (note: the direction of the 
granular activated carbon filter should be with the rubber pad end up towards the filter covers), use 
the wrench to tighten the filter cover. 
3. Replacing the 3
rd
 stage CTO filter 
First close the inlet water ball valve, using the filter cartridge wrench unscrew the 3
rd
 stage filter, 
remove the old filter, then take the new filter out of its packaging (the rubber pad on the filter does 
not need to be taken off), finally place the filter inside the filter cartridge, use the wrench to tighten 
the filter cover. 
4. For replacement of membrane elements please see “RO Membrane Installation” (Page 10). 
4. Notes 
(1)   Notes before filter use: 
When replacing the granular activated carbon filter, first flush the machine in order to avoid activated 
carbon powder from the granular activated carbon filter from flowing into the third stage filter or even 
the RO membrane, resulting in filter and membrane component damage.    Do the following: 
1. Turn off the water purifier inlet water valve; 
2. Using the filter cartridge wrench, remove the water purifier’s third stage filter; 
3. Place a large container near the third filter cartridge cover to collect the black water; 
4. Open the inlet water valve, wait until the water is no longer black; 
5. Close the inlet water valve, reinsert the third stage filter into the filter cartridge, and screw it in tight. 
For the post-activated carbon filter please flush for 1-2 minutes before using. 
(2)  Other considerations: 
1. RO membrane water production volume 
The RO membrane component water volume is influenced by the inlet water pressure and water 
temperature, this machine’s stated volume of 500GPD is tested with net pressure of 0.5MPa and 
inlet  water  temperature  of  25℃,  if  the  net  pressure  is  less  than  0.5MPa  or  if  the  inlet  water 
temperature  is  less  than  25℃,  the  RO  membrane  element  water  production  will  be  less  than 
500GPD. 
          2. Disposal of old filters 
        After replacing old filters, they cannot be cleaned and reused; it is recommended that you dispose 
of them with solid waste garbage. 
Notes 
★  When  any  of  the  following  situations  occur,  immediately  disconnect  the  water  purifier 
water source (close the inlet water ball valve) and/or the power source and carry out repairs. 
· If the water purifier pipes or related components are leaking. 
· If the water purifier’s related components stop working. 
· If any components leak electricity. 
· If there are any other anomalies or failures. 
★ When you go out or do not use the machine, disconnect the water purifier water source 
(close the inlet water ball valve) and/or power source. 










