Backflow

There is one application of backflow preventers that is often overlooked — the use of backflow preventers with beverage dispensers. This application is important...

ASSE International was recently granted a Certificate of Registration for the ASSE One Year Field Test (ASSE 1YT®) certification mark by the U.S. Trademark...

In 1933, Chicago hosted the World’s Fair, which resulted in an unintentional backflow disaster. The sewer systems in the city were undersized and the...

There are many parts to a successful cross-connection control program. The installation, testing, and maintenance of backflow prevention protection is one of the most...

In each issue of Working Pressure, we ask 10 questions to a training coordinator or instructor of an ASSE-approved training provider. Some questions are...

Question: I have a 6” Watts model 909 reduced pressure principle assembly with a badly worn and pitted first check valve seat. Are these seats...

Is the testing of backflow prevention assemblies on fire systems different than testing the backflow prevention assemblies on domestic water systems? The correct answer...

Question: I have a 4” Apollo DCDA 4A that needs service. I am not familiar with this unit. What is the best way to remove...

According to the ASSE International Plumbing Dictionary, working pressure is the maximum pressure in a water piping system allowable under normal working conditions. Likewise,...

Question: I have a 3” Flomatic model RPZ that needs repair. Can you give me some basic information about this assembly? Are there any repair...