Hello, So i am going to be running a irrigation company, however to tie into the main water line, the city requires that a DCVA is installed, To install a DCVA you need a plumber. I was wondering if it would be possible to take a small course or come to some type of agreement with the inspectors/city to allow a specific person to install the setup and test the back flow prevention device each time. Then have a inspector come and check it out. There is still a problem with pulling the permit as i am not a registered plumbing contractor. The installation will be the same every time. Mainline TEE - Elbow - Ball Valve - DVCA - Elbow - PEX-3/4"NPT. Do you think something like this is possible. My other option is to hire a plumber into my company to do this and a few other non-plumbing related things. I am located in Calgary, Canada. I appreciate any information anyone has.