As an active member of WQA and IWA, we participate the conferences, sessions and exhibitions, thus we can understand well the need of commercial and municipal applications.  
Relevant products are, 
1. String wound filter cartridge for pre filtration of sea water desaliantion;
2. Melt blown filter cartridge for pre filtration of sea water desalination and pre-RO filtration;
3. Activated carbon filter cartridge for commercial water filtration.