Backflow

Question: I am working on a 4” Wilkins reduced pressure principle assembly. The model number is 375A. Can you tell me how this model is...

With things moving toward a new normal and the COVID situation becoming more under control in many areas, we are again on the road...

Question: I have a 1” Febco model 860 reduced pressure principal assembly that is dripping from the relief valve and needs to be repaired. Can...

The focus of this issue of Working Pressure is “New Technology." In the backflow industry, changes occur all the time. Existing product standards are...

Question: I am servicing a 4” Ames Model C400. Can you tell me about this assembly and how to change the rubber parts for the...

Question: I am working on a 2” Watts Model 909M1 assembly. The unit has failed the test and I want to replace the rubber parts....

You may know them by one of their various names: sill cock, wall hydrant, spigot, garden hose faucet, lawn faucet, wall tap,...

Question: I am servicing a 4” Apollo Model RP4AN. Can you tell me about this assembly, and how to replace the check valve discs and...

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 3” Watts Model 007DCDA that needs to be serviced. I want to replace the check valve discs. Can you go over...