Zalman only make crap , i made the mistake of buying their Lq1000 case .. the CPU block had pre-corrosion inside where the fittings had been screwed in, the "anti-corrosion" blue additive that came with it (mix with distilled water) crystilised all of the CPU fittings, clogging the system, the alarm shut down the pump once the flow was too low, my brand new (1 month old) i7 970 hit 100C in speedfan overnight and sat there.. it was now a 5 core cpu.. i took apart my loop trying to blow through each component until i found the clog. the flow measureing spinner was clogged up too with a thick blue scum from the additive that came with the case... the cpu block (void warrenty if opened) was a terrible internal design of just corsses cut into the plate like a crossword, all of them plugged with crystals, the out flow fitting was plugged up completely, needing to be chisiled open with a screw driver.
the non existant phone number for zalman which is unlisted by them got me a call back a week later. this was after calling several times and leaving a message with general reception... the phone number has many dead end connections resulting in hangups.
zalman told me tough luck after i very politely told them what happened, te offered to replace the spinner and i could keep the old one. the bottle of additive (which i would no longer ever use) wouldn't be replaced even though it had all gone to waist flushing the system. the cpu block wouldn't be replaced as i had opened it (4screws no damage done) and they for sure wern't on the hook for my now f'd up $580 cpu.
Intel was so gracious they mailed me a new 970 chip immediately, i simply put the old chip in the box it came in and put the PREPAID mailing label on it and phoned for pickup.
I phoned thermaltake and explained i had an old kandalf case that i had replaced with the zalman because i was tired of the door on the kandalf and it's massive size, thermal take mailed me an i7 kit to mount my thermaltake cpu block to my i7 motherboard FOR FREE. and they also sent me FOR FREE 4 litres of there green UV reactive additive that i had told them i had always used in the past.
ZALMAN ... overpriced junk