Granite State Trade School has learned that, according to the State Fire Marshal’s Office, based on a failure of the state legislature to ratify and formally adopt the January 1st, 2016 amendment that changed the way category III and Category IV gas appliances were vented, the amendment has now “sunsetted” and is no longer a provision of the code.
What does this mean? Good news in some ways. The way the venting amendment was written placed the full responsibility to select the proper venting material squarely on the shoulders of the installer, essentially exempting the manufacturer if they recommended some material other than what the amendment allowed. Now we are back to just abiding by the 2009 NFPA 54 which says to install according to manufacturer’s recommendations when it comes to plastic pipe. The entry is found in chapter 12, specifically 12.5.3 under Plastic Vent Joints.
Potential bad news could be included in the reversion back to the code as the code also says in 12.5.2 that the venting material must be “approved”. With all the recent developments concerning PVC being used as a gas vent material, who will approve PVC as a vent material and who will not approve it? The state inspectors have indicated that they won’t approve PVC as a venting material, even though the manufacturers continue to tell installers to use it in their installation instructions.
So where do we go from here? We are still on the 2009 NFPA 54 code, and now their is no NH amendment to contend with. We install according manufacturer’s instructions, checking with the local authority having jurisdiction to see if they have any issue or local ordinance that prohibits the use of whatever venting material the manufacturer recommends.
Granite State Trade School will wait to see what the next move is for NH in terms of this Category III and Category IV venting discussion. Massachusetts has recently passed what looks to be a complete ban on PVC as a gas venting material. Will NH follow suit?