Paul M Alva , FL June 14, 2015 Appliance: Model ON UNIT I broke a 1/4" fitting in the membrain housing remove check valve dissassembled lost some small parts replaced membrain Located Appliance parts Pros.com on internet,found phone number,called parts department,talked to a veary helpful person,ordered parts. Installed new parts,flushed system. Read More... 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Wrench Set