Hello All, I'm going to be getting a Trek Triton IV SMT cleaner with a integrated water treatment system here in a couple of weeks, and I've got a question that maybe somebody can answer. The onboard treatment system has a 1 cu.ft. Carbon and chelate bed, and two 1.5 cu. ft. cation and anion beds (so you can keep running while changing one set when needed). We're just starting-up, so it'll be a little while anyway before we start cleaning any serious board feet of printed circuit boards. My question is; should I get rental DI columns to fill my cleaner, and provide make-up water for the evaporation that happens during operation? Trek says that I'll lose anywhere from 3-10 gallons an hour during normal operation. They also provide a service that I send them a sample of the tap water we have here and they'll do an analysis to get an idea of how hard the water is. I was thinking that there has to be somebody from the S.F. bay area that's already done this drill before, and knows if I need to rent additional mixed-beds besides the ones that I have in the treatment system...the water is the same all over the area here because we all get our water from the Hetch Hetchy reservoir... I've always had rental beds at other places I've worked at here in "silly- con" valley, but then we were talking 2-4 cleaners at a time and high-volume work...this time it's only one cleaner, and I'm just trying to be "frugal". I was just going to run without a rental bed and monitor things to see how it goes, but I don't want to kill my beds right away if there's a risk of that. Thanks in advance!! -Steve Gregory- ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################