Siemens series IONPURE EDI LX-HI hot-water sterilize membrane reactor, LX-HI series are the best choice for medium flow rate (not larger than 10gpm) and bacteria control.
 
No regeneration and need no chemicals
More than 150 times available for disinfection by 85℃hot-water
Instant disinfection (slow heating and cooling is unnecessary)
Doubled O ring for leaking prevention
Durable disinfection under 30 psig (2.0 bar)
Water contact materials meet FDA 21 CFR requirements
Low running cost
Part number: IP-LXM30HI-3