Gas Water Heater Vent Pipe Code

For safety water heaters must be vented using a listed and approved venting system that provides adequate size height and draft.

Gas water heater vent pipe code.

Code expert glenn mathewson describes 10 common water heater code issues including confusion about drip pans and drains unsupported expansion tanks and plastic vents lack of combustion air and more. The national fuel gas code ansi z223 1 nfpa 54 link to 2012 edition. Understanding water heater installation code requirements can be a real pain. With a replacement high efficiency furnace the existing vent pipe does not work for water heater only because the vent is too large.

These questions answers about codes standards for venting gas fired water heaters were posted originally at gas fired water heater venting be sure to review the codes and standards given there. When we are talking about gas furnace vent pipe code we need to talk about the different types of the vents first after all you want to keep your family safe from harm. If the draft hood that came with your water heater has a top opening diameter designed for 3 vent pipe and you have 4 vent pipe installed use an adapter increaser. Installing a tank water heater might seem easy but homeowners who refinish their basements often create a number of code violations with respect to the water heater.

Copper glavanized steel cpvc and pex or pe rt are all approved. The pan shall be not less than 1 1 2 inches 38 mm in depth and shall be of sufficient size and shape to receive all dripping or condensate from the tank or water heater. For some reason the installer of the water heater shown below decided that the tpr drain piping needed a vent pipe. All water heaters that burn natural gas or liquid propane lp gas require a venting system.

504 7 1 pan size and drain. Gas water heater draft hoods come in different sizes and if you are replacing water heater make sure that the draft hood and the water heater vent pipe match each other. 11 pipe should be of approved materials. These vents must be made of suitable materials and be kept clear of.

The different types of venting. Use the manufacturer provided draft hood. Violating these codes may result in fines voiding your warranty or putting your family at risk. Well making sure that you choose the right venting style will protect them.

The photo below shows typical combined furnace water heater venting. When installed correctly this venting arrangement works with an 80 gas furnace or lower than 80 gas water heater. The pan shall be drained by an indirect waste pipe having a diameter of not less than 3 4 inch 19 mm.