Tankless Water Heaters - Product Recall

The Technical Standards & Safety Authority issued an advisory regarding Navien instantaneous hot water heaters. It states that the joints for the entire venting system of all Navien water heaters manufactured between February 29, 2008 and December 31, 2008 must be
re-inspected to ensure they are properly fused, to prevent any potential flue products from being expelled into the living space of a home. The lack of fusing between joints has been attributed to an inadequate application of cement.
Navien has requested installers to inspect any Navien water heaters manufactured through the end of December 2008 to ensure all collar and exhaust sections are fused appropriately. The company has stated that application of ULC S636 compliant cement - in accordance with the cement manufacturer's instructions - will be required for collar and exhaust sections improperly fused. Navien stated it has tested and approved the use of IPEX System 636 and Royal Group GVS-65 cements for fusing Navien water heater collars to PVC venting pipes. Navien have
also requested service contractors and installers report the number of inspections and remediations undertaken for a water heater back to the distributor where it was purchased. The manufacturing year is located in letters five through eight of the 16-digit serial number (Example: XXXX2008XXXXXXXX).