Backflow

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?...

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...

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...

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

Prevention Rather Than Cure” has been ASSE’s motto for as long as anyone can remember. It is a motto that we quote...

The most often asked question about backflow protection is also the title of this article, “How do we decide the proper cross-connection...