Bought these to replace a much more expensive similar model from a CO2 system supplier. Worked great initially, but after a very short time all units (4) found a leak in the hose connection closest to the CO2 line connector. Checked with new gaskets, cleaned the ceramic insert, used teflon tape, lowered the CO2 operating pressure --- none of this stopped the CO2 leak. I've tried at least 4 of these units, ALL of which had this leak within 4 weeks of installation. DO NOT BUY. Your CO2 tank suddenly empties without warning as the device releases CO2 into the room instead of diffusing it into the water. Garbage, a false sense of security, looks great at first but will give you away every time.
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