The 2021 model code cycle is wrapping up and with it comes the news of what to expect. Knowing what is coming will affect your training, supply chain, marketing, and manufacturing efforts. However, we are still a long way off from the requirements being in effect – consider the current revision of your local plumbing code and when it was adopted!
Regarding the 2021 Uniform Plumbing Code (UPC®) and International Plumbing Code (IPC®), there were some significant updates with respect to the types of backflow prevention devices accepted. Some of these have been in use for some time in the field, but not officially prescribed in the body of codes. To that point, there are a few added ASSE standards confirmed to the 2021 IPC, and similarly, but unconfirmed, to the 2021 UPC. Notwithstanding any changes, here is what you can expect in terms of ASSE backflow standards in the UPC and IPC when they are released:
ASSE 1012, Backflow Preventers with Intermediate Atmospheric Vent
UPC: Now in Section 603.3.12 and Table 603.2.
For low-hazard applications, ASSE 1012 is being added to the UPC for acceptable means of backflow. These dual check valves with intermediate atmospheric vents are normally used for boiler system feed applications or for supplying humidifiers. ASSE 1012 is included in Sections 608.14.3, 608.17.2, 608.17.10, and Table 608.1 of the IPC.
ASSE 1024, Dual Check Backflow Preventers
UPC: Now in Section 603.3.10 and Table 603.2.
These devices are typically used in non-carbonated beverage dispensers or coffee machines. Note that carbonated beverage dispensers need to be protected using an ASSE 1022 device because of the risk of copper poisoning when carbonic acid reacts with the copper in brass or bronze. ASSE 1024 is included in Sections 605.3.1, 608.14.9, 608.17.1.2, and Table 608.1 of the IPC.
ASSE 1035, Laboratory Faucet Backflow Preventers
UPC: Now in Section 603.3.11 and Table 603.2.
You will see ASSE 1035 devices attached to the outlets of gooseneck and other faucets in high schools, hospitals, and laboratories. These fittings typically have hose end connections to supply the various needs of a lab and, as such, are designed to be high-hazard devices and not to be used under continuous pressure. ASSE 1035 is included in Section 608.14.6 and Table 608.1 of the IPC.
ASSE 1064, Backflow Prevention Assembly Field Test Kits
UPC: Now in Section 603.4.2.
IPC: Now in Section 312.10.2.
Field test kits, which qualify whether backflow preventers are operating, did not have to conform to a standard before now. So much of our health depends on properly functioning backflow preventers. These kits are calibrated regularly by professionals, just like you would any other piece of laboratory equipment or test gauge in a manufacturer’s facility.
ASSE 1081, Backflow Preventers with Integral Pressure Reducing Boiler Feed Valve and Intermediate Atmospheric Vent Style for Domestic and Light Commercial Water Distribution Systems
UPC: Now in Section 603.5.10 and Table 603.2.
IPC: Now in Sections 608.14.3, 608.17.2, and Table 608.1.
Typically, you would want your hydronic system to have a pressure regulating valve (PRV) on the cold-water inlet. Per code, you are required to have a backflow preventer at the inlet as well. Companies have been producing combination PRV and vented dual check backflow preventers for a few years now, resulting in ASSE 1081. For low-hazard applications (i.e. no de-scaler or propylene glycol added to the system), you can use an ASSE 1013, 1012, 1015, or now a 1081 assembly to protect against backflow.
Feel free to reach out to me at conrad.jahrling@asse-plumbing.org or anyone else at ASSE if you have any questions on these backflow standards. The more education, and use of the appropriate backflow prevention method for the application, the better.
