Using RO permeate water whenever possible, either acid or alkaline cleaning will depend on the type of foulant suspected.  Acid cleaning should be performed first even when alkaline cleaning is desired, since if system performance recovers with acid cleaning, then alkaline cleaning is not necessary.

CLEANING SYSTEM
When cleaning the system, begin by connecting the cleaning tank and pump system to the membrane system. Take care not exceed 60 psi pump pressure and it may be necessary to clean one tube at a time.  Return permeate and concentrate tubes to the cleaning tank and include a 10 micron filter in the concentrate return line to the tank.

ACID CLEANING
Preparing the Solution

• Adjust water pH to between 2 and 3 by adding acid cleaner slowly (AM-44 for CA and AM-11 for TF elements) , mixing well.
  
• Wear protective clothing including face mask and rubber gloves and mix with care.
  
• CAUTION IS ADVISED.
  

• Adjust water pH to a pH of 8 for CA elements and 11 for TF elements by adding alkaline cleaner slowly (AM-33 for CA elements and AM-22 for TF elements), stirring continuously and carefully until dissolved. Higher pH will damage membrane. 
  
• Wear protective clothing including face mask and rubber gloves.  Alkaline cleaner can cause severe eye damage.
  
• CAUTION IS ADVISED.