Double Check Valve ( DCV ) Possible Failures & Diagnostics on the ABPA Practical Exam - EXPLAINED

Breakdown on the possible failures and diagnostics that you may encounter when taking an ABPA, AWWA, or similar USC 10th edition based practical exam

[@marygarate2202]

I can honestly say that I dont think I would have aced the hands on exam without you diagnostic videos.Thank you for that !

[@LetsTalkBibleOroville]

At 6:17 it’s mentioned that the previous reading is the differential pressure across check valve #1, but I think you meant to say the previous reading is the differential pressure across check valve #2? It’s step T7 in the 10th edition book (Page 288).

[@thebackflowbro6864]

Yeah you’re right .. I misspoke during the video, we were testing CV-2 so you would record the previous reading for CV-2 not CV-1

[@DrainFlavors]

Was just getting ready to comment the same thing , thank you!

[@jrodriguez-lt4mr]

What about if water recedes from test cock three wich indicates leaking number 2 shut off valve with demand and leaking number two check leak also my question will you continue on to test second check or test ends right their ?

[@thebackflowbro6864]

So what you are talking about is a multiple failure scenario, can happen in the field and the book goes over it, but we have it omitted here since they can’t simulate multiple failures on the exams .. but yes I believe if you can tell CV-2 leaks with a SO-2 leak with flow, then you would not need to do the next steps

[@marcoflores8004]

this guys all business goes so fast lol but good

[@thebackflowbro6864]

Thanks bro !

[@AntoinetteFanny-l8s]

Martin George White Mark Miller Eric