Reply To: zone valve failures on a four zone baseboard heating system Home › Forums › Archives › Old Bulletin Board Archives › zone valve failures on a four zone baseboard heating system › Reply To: zone valve failures on a four zone baseboard heating system 8 Mar 1999 at 1:59 pm #309228 alexParticipant The installation of zone valves may be incorrect. I cannot recall the exact specs but the motor cannot be installed facing down. You may just want to read the installation instructions.
