Sorry, Don't mean to completely resurrect an old thread, but since people will likely be reading these threads for several more years, I thought I'd throw in some info that will be relevant to anyone else attempting repairs on the Fleck 7000. Fleck has discontinued the 7000 control valve back in 2016. They have only promised parts availability for about 5 years from the point of discontinuation, so parts may only be available through about 2021. Some dealers and OEM's had already reported difficulty in obtaining parts as of late 2018. If you have extensive repairs to do on your 7000 model, it may be best to update the control valve with another valve type or even replace the entire unit so you aren't throwing a bunch of money into an obsolete machine...