All venting must be done in accordance with local codes and regulations. Local building codes from city to city and state to state will vary. Some jurisdictions may allow venting material not allowed by other jurisdictions.
All jurisdictions in North America allow for Z-Vent material to be used for venting tankless hot water heaters. The condensation of a tankless water heater is slightly more acidic than that of a standard water heater. Z-Vent is double walled stainless steel vent pipe made specifically for venting tankless heaters. Z-Vent is intended for lifetime use and will never corrode or rust.
Some jurisdictions in North America allow for B-Vent to be used. B-Vent is double walled galvanized vent pipe made for standard water heaters and stove vent pipe. B-Vent is not lifetime material and will eventually corrode after extended use. Before deciding what material to use, you MUST check your local building codes to see what is allowed in your jurisdiction. If you choose to use B-Vent, you MUST check it at least monthly for corrosion and replace vent pipes immediately if corrosion is detected.
Diameter of the vent pipe is 4” for 5L, 4” for 10L, and 5” for 16L units. Use the coupler provided with your unit for installation on the 5L and 10L units. Vent pipe attaches directly to the unit in 16L models. For the 16L tankless when using the Z-Flex stainless steel venting you may also need a 5" stainless universal adapter and then a 5" single wall to double wall stainless adapter if you are going to use 5" double wall stainless steel venting.
For more information about the venting material you may need for your Marey tankless water heater, please consult the Marey Corporation or refer to the installation manual with the heater but the most important fact is to check what your local code requires!!
To order any of the Z-Vent single wall or double wall stainless steel venting pipe, adapters etc. please call us at our toll free number 888-726-9752.